Telit Wireless Solutions UE866-N3G, UE866-EU Hardware User's Manual

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UE866 HARDWARE USER
GUIDE

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APPLICABILITY TAB L E

PRODUCTS

UE866-N3G

UE866-EU

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DISCLAIMER

LEGAL NOTICE

These Specifications are general guidelines pertaining to product selection and application and may
not be appropriate for your particular project. Telit (which hereinafter shall include, its agents, licensors
and affiliated companies) makes no representation as to the particular products identified in this
document and makes no endorsement of any product. Telit disclaims any warranties, expressed or
implied, relating to these specifications, including without limitation, warranties or merchantability,
fitness for a particular purpose or satisfactory quality. Without limitation, Telit reserves the right to
make changes to any products described herein and to remove any product, without notice.
It is possible that this document may contain references to, or information about Telit products,
services and programs, that are not available in your region. Such references or information must not
be construed to mean that Telit intends to make available such products, services and programs in
your area.

USE AND INTELLECTUAL PROPERTY RIGHTS

These Specifications (and the products and services contained herein) are proprietary to Telit and its
licensors and constitute the intellectual property of Telit (and its licensors). All title and intellectual
property rights in and to the Specifications (and the products and services contained herein) is owned
exclusively by Telit and its licensors. Other than as expressly set forth herein, no license or other
rights in or to the Specifications and intellectual property rights related thereto are granted to you.
Nothing in these Specifications shall, or shall be deemed to, convey license or any other right under
Telit’s patents, copyright, mask work or other intellectual property rights or the rights of others.

You may not, without the express written permission of Telit: (i) copy, reproduce, create derivative
works of, reverse engineer, disassemble, decompile, distribute, merge or modify in any manner these
Specifications or the products and components described herein; (ii) separate any component part of
the products described herein, or separately use any component part thereof on any equipment,
machinery, hardware or system; (iii) remove or destroy any proprietary marking or legends placed
upon or contained within the products or their components or these Specifications; (iv) develop
methods to enable unauthorized parties to use the products or their components; and (v) attempt to
reconstruct or discover any source code, underlying ideas, algorithms, file formats or programming or
interoperability interfaces of the products or their components by any means whatsoever. No part of
these Specifications or any products or components described herein may be reproduced, transmitted,
transcribed, stored in a retrieval system, or translated into any language or computer language, in any
form or by any means, without the prior express written permission of Telit.

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HIGH RISK MATERIALS

Components, units, or third-party products contained or used with the products described herein
are NOT fault-tolerant and are NOT designed, manufactured, or intended for use as on-line control
equipment in the following hazardous environments requiring fail-safe controls: the operation of
Nuclear Facilities, Aircraft Navigation or Aircraft Communication Systems, Air Traffic Control, Life
Support, or Weapons Systems (“High Risk Activities"). Telit, its licensors and its supplier(s) specifically
disclaim any expressed or implied warranty of fitness for such High Risk Activities.

TRADEMARKS

You may not and may not allow others to use Telit or its third party licensors’ trademarks. To the
extent that any portion of the products, components and any accompanying documents contain
proprietary and confidential notices or legends, you will not remove such notices or legends.

THIRD PARTY RIGHTS

The software may include Third Party Right software. In this case you agree to comply with all terms
and conditions imposed on you in respect of such separate software. In addition to Third Party Terms,
the disclaimer of warranty and limitation of liability provisions in this License shall apply to the Third
Party Right software.

TELIT HEREBY DISCLAIMS ANY AND ALL WARRANTIES EXPRESS OR IMPLIED FROM ANY
THIRD PARTIES REGARDING ANY SEPARATE FILES, ANY THIRD PARTY MATERIALS
INCLUDED IN THE SOFTWARE, ANY THIRD PARTY MATERIALS FROM WHICH THE SOFTWARE
IS DERIVED (COLLECTIVELY “OTHER CODE”), AND THE USE OF ANY OR ALL THE OTHER
CODE IN CONNECTION WITH THE SOFTWARE, INCLUDING (WITHOUT LIMITATION) ANY
WARRANTIES OF SATISFACTORY QUALITY OR FITNESS FOR A PARTICULAR PURPOSE.

NO THIRD PARTY LICENSORS OF OTHER CODE SHALL HAVE ANY LIABILITY FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND WHETHER
MADE UNDER CONTRACT, TORT OR OTHER LEGAL THEORY, ARISING IN ANY WAY OUT OF
THE USE OR DISTRIBUTION OF THE OTHER CODE OR THE EXERCISE OF ANY RIGHTS
GRANTED UNDER EITHER OR BOTH THIS LICENSE AND THE LEGAL TERMS APPLICABLE TO
ANY SEPARATE FILES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

Copyright © Telit Communications PLC.

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CONTENTS

1 Introduction 8

1.1 Scope 8

1.2 Audience 8

1.3 Contact Information, Support 8

1.4 List of acronyms 9

1.5 Text Conventions 10

1.6. Related Documents 10

2 Overview 11
3 Pins Allocation 12

3.1 Pin-out 12

LGA Pads Layout 16

4 Power Supply 17

4.1 Power Su pp l y Requirements 17

4.2 Power Consumption 18

4.3 General Design Rules 19

Electrical Design Guidelines 19

+5V Source Power Supply Design Guidelines 19
+ 12V input Source Power Supply Design Guidelines 20
Battery Source Power Supply Design Guidelines 21
Thermal Design Guidelines 22
Power Supply PCB layout Guidelines 23

4.4 RTC Bypass out 24

4.5 VAUX Power Output 24

5 Digital Section 25

5.1 Logic Levels Specification 25

5.2 Power on 26

5.3 Power off 29

5.4 Reset 30

5.5 Communication ports 33

USB 2.0 HS 33
SPI 34

SPI Connections 34

Serial Ports 35

MODEM SERIAL PORT 1 (USIF0) 35

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MODEM SERIAL PORT 2 (USIF1) 37
RS232 LEVEL TRANSLATION 38

5.6 General Purpose I/O 39

Using a GPIO as INPUT 40
Using a GPIO as OUTPUT 40
Indication of network service availability 41
SIMIN Detection 42

5.7 External SIM Holder 42

5.8 ADC Converter 43

5.9 DAC Converter 44

Enabling DAC 44
LOW Pass filter Example 45

6 RF Section 46

6.1 Bands Variants 46

6.2 TX Output Power 46

6.3 RX Sensitivity 47

6.4 Antenna Requirements 48

PCB design guidelines 48
PCB Guidelines in case of FCC Certification 50

Transmission line design 50
Transmission Line Measurements 51
Antenna Installation Guidelines 54

7 Audio Section 55

7.1 Overview 55

7.2 Digital Voice Inter f ac e 55

CODEC Examples 55

8 Mechanical Design 56

8.1 Drawing 56

9 Application Design 57

9.1 Footprint 57

9.2 PCB pad design 58

9.3 PCB pad dimensions 58

9.4 Stencil 60

9.5 Solder paste 60

9.6 Solder reflow 60

10 Packaging 62

10.1 Tray 62

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10.2 Moisture sensitivity 64

11 SAFETY RECOMMANDATIONS 65
12 FCC/IC Regulatory notices 66
13 Document History 69

13.1 Revisions 69

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1 INTRODUCTION

1.1 Scope

The aim of this document is the description of some hardware solutions useful for developing a product
with the Telit UE866 module.

1.2 Audience

This document is intended for Telit customers, who are integrators, about to implement their applications
using our UE866 modules.

1.3 C ontact Informat ion, Support

For general contact, technical support services, technical questions and report documentation errors
contact Telit Technical Support at:

[e-mail]
[e-mail]
[e-mail]

Alternatively, use:

http://www.telit.com/support

For detailed information about where you can buy the Telit modules or for recommendations on
accessories and components visit:

http://www.telit.com

Our aim is to make this guide as helpful as possible. Keep us informed of your comments and
suggestions for improvements.
Telit appreciates feedback from the users of our information.

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1.4 Li s t of acronyms

Acronym

Description

TTSC

Telit Technical Support Centre

USB

Universal Serial Bus

HS

High Speed

DTE

Data Terminal Equipment

UMTS

Universal Mobile Telec ommunication System

WCDMA

Wideband Code Division Multiple Access

HSDPA

High Speed Downlink Packet Access

HSUPA

High Speed Uplink Packet Access

UART

Universal Asynchronous Receiver Transmitter

HSIC

High Speed Inter Chip

SIM

Subscriber Identification Module

SPI

Serial Peripheral Interface

ADC

Analog – Digital Converter

DAC

Digital – Analog Converter

I/O

Input Output

GPIO

General Purpose Input Output

CMOS

Complementary Metal – Oxide Semiconductor

MOSI

Master Output – Slave Input

MISO

Master Input – Slave Output

CLK

Clock

MRDY

Master Ready

SRDY

Slave Ready

CS

Chip Select

RTC

Real Time Clock

PCB

Printed Circuit Board

ESR

Equivalent Series Resistance

VSWR

Voltage Standing Wave Radio

VNA

Vector Network Analyzer

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1.5 Text Conventions

Danger – This information MUST be followed or catastrophic equipment failure
or bodily injury may occur.

Caution or Warning – Alerts the user to important points about integrating the
module, if these points are not followed, the module and end user equipment
may fail or malfunction.

Tip or Information – Provides advice and suggestions that may be useful when
integrating the module.

All dates are in ISO 8601 format, i.e. YYYY-MM-DD.

1.6. Related Documents

• Digital Voice Interface Application Note 80000NT10050A

• SPI Port Application Note 80000NT10053A

• SIM Holder Design Guides 80000NT10001a

• AT Commands Reference Guide 80378ST10091A

• Telit EVK2 User Guide 1vv0300704

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2 OVERVIEW

The aim of this document is the description of some hardware solutions useful for developing a product
with the Telit UE866 module.
In this document all the bas ic functions of a mobile phone will be taken into account; for each one of
them a proper hardware s olution will be suggested a nd eventually the wrong solut ions and common
errors to be avoided wil l be evidenc ed. Obviousl y this docum ent cannot em brace the whole h ardware
solutions and products that may be designed. T he wrong solutions to be avoided shall be consi dered
as mandatory, while the suggested hardware configurations shall not be considered mandatory, instead
the information given shall be used as a guide and a starting point for properly developing your product
with the Telit UE866 module. F or further hard ware details that m ay not be explai ned in this docum ent
refer to the Telit UE866 Product Description document where all the hardware information is reported.

NOTICE:

(EN) The integration of the WCDMA UE866 cellular m odu le with in user
application shall be done according to the design rules described in this
manual.

(IT) L’integrazione del modulo cellulare WCDMA UE866 all’interno
dell’applicazione dell’utente dovrà rispettare le indicazioni progettuali descritte
in questo manuale.

(DE) Die Integration des UE866 WCDMA Mobilfunk-Moduls in ein Gerät muß
gemäß der in diesem Dokument beschriebenen Kunstruktionsregeln erfolgen.

(SL) Integracija WCDMA UE866 modula v uporabniški aplikaciji bo morala
upoštevati projektna navodila, opisana v tem priročniku.

(SP) La utilización del modulo WCDMA UE866 debe ser conforme a los usos
para los cuales ha sido deseñado descritos en este manual del usuario.

(FR) L’intégration du module cellulaire WCDMA UE866 dans l’application de
l’utilisateur sera faite selon les règles de conception décrites dans ce manuel.

(HE)

The information presented in this document is believed to be accurate and reliable. However, no
responsibility is assumed by Telit Communications S.p.A. for its use, nor any infringement of patents or
other rights of third parties which may result from its use. No license is granted by implication or
otherwise under an y patent rights of Telit Comm unications S.p.A. ot her than for c ircuitry embodi ed in
Telit products. This document is subject to change without notice.

UE866

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3 PINS ALLOCATION

3.1 Pin-out

Pin

Signal

I/O

Function

Type

Comment

USB HS 2.0 COMMUNICATION PORT

E5

USB_D+

I/O

USB differential Data (+)

-

E6

USB_D-

I/O

USB differential Data (-)

-

D4

USB_VBUS AI

Power sense for the internal
USB transceiver.

-

Asynchronous Serial Port (USIF0) - Prog. / Data + HW Flow Control

B2

C109/DCD O

Output for Data carrier detect
signal (DCD) to DTE

CMOS 1.8V

B3

C125/RING O

Output for Ring indicator
signal (RI) to DTE

CMOS 1.8V

A3

C107/DSR O

Output for Data set ready
signal (DSR) to DTE

CMOS 1.8V

A2

C108/DTR I

Input for Data terminal ready
signal (DTR) from DTE

CMOS 1.8V

A1

C105/RTS I

Input for Request to send
signal (RTS) from DTE

CMOS 1.8V

B1

C106/CTS O

Output for Clear to send signal
(CTS) to DTE

CMOS 1.8V

A4

C103/TXD I

Serial data input (TXD) from
DTE

CMOS 1.8V

A5

C104/RXD

O

Serial data output to DTE

CMOS 1.8V

Asynchronous Auxiliary Serial Port (USIF1)

C2

RXD_AUX /SPI_MISO

I O Auxiliary UART (RX Data)

SPI_MISO

CMOS 1.8V

C1

TXD_AUX / SPI_MOSI

O I Auxiliary UART (TX Data)

SPI_MOSI

CMOS 1.8V

SIM card interface

C7

SIMVCC -

External SIM signal – Power
supply for the SIM

1.8 / 3V

B7

SIMRST

O

External SIM signal – Reset

1.8 / 3V

A7

SIMCLK

O

External SIM signal – Clock

1.8 / 3V

A6

SIMIO

I/O

External SIM signal – Data I/O

CMOS 1.8

X

SIMIN

I

Presence SIM input

1.8 / 3V

All GPI0 can be used

DIGITAL IO

C5

GPIO_01 / DVI_WA0

I/O

GPIO01 Configurable GPIO

CMOS 1.8V

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/ Digital Audio Interface (WA0)

C6

GPIO_02 / JDR / DVI_ R X I/O

GPIO02 I/O pin

/ Jammer Detect Report

/ Digital Audio Interface (RX)

CMOS 1.8V

D6

GPIO_03 / DVI_TX I/O

GPIO03 GPIO I/O pin
/ Digital Audio Interface (TX)

CMOS 1.8V

D5

GPIO_04 / DVI_CLK I/O

GPIO04 Configurable GPIO

Digital Audio Interface (CLK)

CMOS 1.8V

B5

GPIO_05

I/O

GPIO05 Configurable GPIO

CMOS 1.8V

B4

GPIO_06 I/O

GPIO06 Configurable GPIO
/ ALARM

CMOS 1.8V

C4

GPIO_07 I/O

GPIO07 Configurable GPIO
/ STATLED

CMOS 1.8V

Alternate Function STAT
LED

F11

SPI_CLK

I/O

SPI_CLK

CMOS 1.8V

E11

SPI_SRDY

I/O

SPI_SRDY

CMOS 1.8V

D11

SPI_MRDY

I/O

SPI_MRDY

CMOS 1.8V

ADC and DAC

F4

ADC_IN1 AI Analog/Digital converter input A/D

Accepted values 0 to 1.2V
DC

E4

DAC_OUT AO

Digital/Analog converter
output

D/A

RF SECTION

G2

Antenna

I/O

Antenna pad – 50 Ω

RF

Miscellaneous Functions

F5

VRTC AO

backup for the embedded
RTC supply (1.8V)

-

G4

RESET*

I

Reset Input

CMOS 1.8V

G6

VAUX / PWR MON O

1.8V stabilized output

Imax=100mA

/ Power ON monitor

Power

Power Supply

E2

VBATT -

Main power supply
(Baseband)

Power

E1

VBATT_PA

-

Main power supply (Radio PA)

Power

D1

GND

-

Ground

Power

F1

GND

-

Ground

Power

G1

GND

-

Ground

Power

D2

GND

-

Ground

Power

F2

GND

-

Ground

Power

C3

GND

-

Ground

Power

E3

GND

-

Ground

Power

F3

GND

-

Ground

Power

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G3

GND

-

Ground

Power

F6

GND

-

Ground

Power

A8

GND

-

Ground

Power

G8

GND

-

Ground

Power

A11

GND

-

Ground

Power

G11

GND

-

Ground

Power

RESERVED

D3

RESERVED

-

RESERVED

G5

RESERVED

-

RESERVED

B6

RESERVED

-

RESERVED

D7

RESERVED

-

RESERVED

E7

RESERVED

-

RESERVED

F7

RESERVED

-

RESERVED

G7

RESERVED

-

RESERVED

B8

RESERVED

-

RESERVED

C8

RESERVED

-

RESERVED

D8

RESERVED

-

RESERVED

E8

RESERVED

-

RESERVED

F8

RESERVED

-

RESERVED

A9

RESERVED

-

RESERVED

B9

RESERVED

-

RESERVED

C9

RESERVED

-

RESERVED

D9

RESERVED

-

RESERVED

E9

RESERVED

-

RESERVED

F9

RESERVED

-

RESERVED

G9

RESERVED

-

RESERVED

A10

RESERVED

-

RESERVED

B10

RESERVED

-

RESERVED

C10

RESERVED

-

RESERVED

D10

RESERVED

-

RESERVED

E10

RESERVED

-

RESERVED

F10

RESERVED

-

RESERVED

G10

RESERVED

-

RESERVED

B11

RESERVED

-

RESERVED

C11

RESERVED

-

RESERVED

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WARNING:
Reserved pins must not be connected

If not used, almost all pins should be left disconnected. The only exceptions are the following pins:

PAD

Signal

Note

E2

VBATT

E1

VBATT_PA

D1, F1, G1, D2, F2, C3, E3,

F3, G3, F6, A8, G8, A11,

G11

GND

G2

Antenna

A4

C103/TXD

If not used should be connected to a Test Point

A5

C104/RXD If not used should be connected to a Test Point

A1

C105/RTS

If not used should be connected to a Test Point

B1

C106/CTS

If not used should be connected to a Test Point

G6

VAUX / PWR MON

G4

RESET*

C1

TXD_AUX

If not used should be connected to a Test Point

C2

RXD_AUX

If not used should be connected to a Test Point

E5

USB D+

If not used should be connected to a Test Point or an
USB connector

E6

USB D-

If not used should be connected to a Test Point or an
USB connector

D4

USB_VBUS

If not used should be connected to a Test Point or an
USB connector

C7

SIMVCC

B7

SIMRST

A7

SIMCLK

A6

SIMIO

RTS pin should be connected to the GND (on the module side) if flow control is not used.
The above pins are also necessary to debug the application when the module is assembled on it so
we recommend connecting them also to dedicated test point.

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LGA Pads Layout

TOP VIEW

A B C D E F G

1

C105/RTS C106/CTS TX AUX GND VBATT_PA GND GND

2

C108/DTR C109/DCD RX AUX GND VBATT GND ANT

3

C107/DSR C125/RING GND RFU GND GND GND

4

C103/TXD GPIO_06 GPIO_07 USB_VBUS DAC_OUT ADC_IN1 RESET*

5

C104/RXD GPIO_05 GPIO_01 GPIO_04 USB_D+ VRTC

RESERVED

6

SIMIO

RESERVED

GPIO_02 GPIO_03 USB_D- GND

VAUX/PWR

MON

7

SIMCLK SIMRST SIMVCC

RESERVED RESERVED RESERVED RESERVED

8

GND

RESERVED

RFU RFU RFU RFU GND

9 RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED

10 RESERVED RESERVED RESERVED RESERVED

RFU

RESERVED RESERVED

11

GND

RESERVED RESERVED

SPI_MRDY SPI_SRDY SPI_CLK GND

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4 POWER SUPPLY

The power supply circuitry and board layout are a very important part in the full product design and
they strongly reflect on the product overall performances, hence read carefully the requirements and
the guidelines that will follow for a proper design.

4.1 Power Supply Requir ements

The external power supply must be connected to VBATT & VBATT_PA signals and must fulfil the
following requirements:

Power Supply

Value

Nominal Supply Voltage

3.8V

Normal Operating Voltage Range

3.40 V÷ 4.20 V

Extended Operating Voltage Range

3.10 V÷ 4.50 V

NOTE:
The Operating Voltage Range MUST never be exceeded; care must be taken
when designing the application’s power supply section to avoid having an
excessive voltage drop.
If the voltage drop is exceeding the limits it could cause a Power Off of the
module.
The Power supply must be higher than 3.22 V to power on the module

Overshoot voltage (regarding MAX Extended Operating Voltage) and drop in
voltage (regarding MIN Extended Operating Voltage) MUST never be
exceeded;
The “Extended Operating Voltage Range” can be used only with completely
assumption and application of the HW User guide suggestions.

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4.2 Power Consumpti on

Mode

Average (mA)

Mode Description

Switched OFF

180uA

Module supplied but Switched Off

Idle mode (GSM/EDGE)

AT+CFUN=1

19

Normal mode: full functionality of the
module

AT+CFUN=4

16.5

Module is not registered on the network

AT+CFUN=5

1.2

Full functionality with power saving;
DRX9 (1.3mA in case of DRX5).

Operative mode (GSM)

CSD TX and RX Mode

GSM Voice Call

GSM 850/900 CSD PL5

220

DCS1800/ PCS1900 CSD PL0

167

GPRS 4TX+ 1RX

GPRS Sending Data Mode

GSM 850/900 PL5

580

DCS1800/ PCS1900 PL0

438

Idle mode (WCDMA)

AT+CFUN=1

19

Normal mode: full functionality of the
module

AT+CFUN=5

1.6 mA

Disabled TX and RX; DRX7

Operative mode (WCDMA)

WCDMA Voice

175

WCDMA voice call (TX = 10dBm)

WCDMA HSDPA (22dBm)

490

WCDMA data call (Cat 8, TX = 22dBm)

NOTE:
The electrical design for the Power supply should be made ensuring it will be
capable of a peak current output of at least 1 A.

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4.3 General Design Rules

The principal guidelines for the Power Supply Design embrace three different design steps:

• the electrical design

• the thermal design

• the PCB layout.

Ele c trical Design Guidelines

The electrical des ign of th e po w er s u pply depends str ong l y from the power so urc e wher e th is p o wer is
drained. We will distinguish them into three categories:

• +5V input (typically PC internal regulator output)

• +12V input (typically automoti ve)

• Battery

+5V Source Power Supply Design Guidelines

• The desired output for the power supply is 3.8V, hence there's not a big difference between the
input source and the d esired output and a linear reg ulator can be used. A switching po wer
supply will not be suited because of the low drop out requirements.

• When using a linear regulator, a proper heat sink shall be prov ided in order to diss ipate the
power generated.

• A Bypass low ESR capac it or of adeq uate c a pac i t y m ust be pro vi ded in order t o c ut the c urr ent
absorption peaks close to the Module, a 100μF capacitor is usually suited.

• Make sure the low ESR capacitor on the power supply output rated at least 10V.

• A protection diode sh ould be inserted close to the p ower input, in order to save th e UE866

from power polarity inversion. This can be the same diode as for spike protection.

An example of linear regulator with 5V input is:

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+ 12V input Source Power Supply Design

Guidelines

• The desired output for the power su pply is 3.8V, hence due to the big diff erence between t he
input source and the des ired output, a linear regula tor is not suited and shal l not be used. A
switching power supply will be preferable because of its better efficiency.

• When using a switching regulator, a 500kHz or more switching frequency regulator is preferable
because of its smaller ind uc tor si ze and its f aster transient res pons e. This allows the regu lator
to respond quickly to the current peaks absorption.

• In any case the f requency and Switching des ign selection is related to the application to be
developed due to the fact the switching frequency could also generate EMC interferences.

• For car PB battery the input voltage c an r ise u p to 15 ,8V and this should be kept i n m ind when
choosing components: all components in the power supply must withstand this voltage.

• A Bypass low ESR capac it or of adeq uate c a pac i t y m ust be pro vi ded in order t o c ut the c urr ent
absorption peaks, a 100μF capacitor is usually suited.

• Make sure the low ESR capacitor on the power supply output is rated at least 10V.

• For Car applications a spike protection diode should be inser ted close to the power input, in

order to clean the supply from spikes.

• A protection diode sh ould be inserted close to the p ower input, in order to save th e UE866
from power polarity inversion. This can be the same diode as for spike protection.

An example of switching regulator with 12V input is in the below schematic:

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Battery Source Power Supply Design Guidelines

The desired nom inal output for the po wer supply is 3.8V an d the maximum voltage allowed is 4.2V ,
hence a single 3.7V Li-Ion cell battery type is suited for supplying the power to the Telit UE866 module.

• A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current
absorption peaks, a 100μF tantalum capacitor is usually suited.

• Make sure the low ESR capacitor (usually a tantalum one) is rated at least 10V.

• A protection diode should be inserted close to the power input, in order to save the UE866 from

power polarity invers ion. Otherwise the battery connec tor should be done in a way to avo id
polarity inversions when connecting the battery.

• The battery capac ity must be at least 500mAh in order to withstand the cur rent peaks of 2A;
the suggested capacity is from 500mAh to 1000mAh.

WARNING:
The three cells Ni/Cd or Ni/MH 3,6 V Nom. battery types or 4V PB types MUST
NOT BE USED DIRECTLY since their maximum voltage can rise over the
absolute maximum voltage for the UE866 and damage it.

NOTE:
DON'T USE any Ni-Cd, Ni-MH, and Pb battery types directly connected with
UE866. Their use can lead to overvoltage on the UE866 and damage it. USE
ONLY Li-Ion battery types.

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Thermal Design Guidelines

The thermal design for the power supply heat sink should be done with the following specifications:

• Average current consumption during HSDPA transmission @PWR level max : 700 mA

• Average current during idle: 1.8 mA

Considering the very low current during idle, especially if Power Saving function is enabled, it is possible
to consider from the thermal point of view that the device absorbs current significantly only during calls.

If we assume that the device stays into transmission for short periods of time (let's say few minutes) and
then remains for a quite long time in idle (let's say one hour), then the power supply has always the time
to cool down between the calls and t he heat sink c ould be smaller than th e calculated one f or 700mA
maximum RMS current, or even could be the simple chip package (no heat sink).
Moreover in the average net work c onditions the dev ice is requeste d to transm it at a lower po wer level
than the maximum and hence the current consumption will be less than the 700mA, being usually around
150mA.

In order to ensure a good thermal cond ition and to avoid overheating a groun d plane as widest as
possible according to application board and more vias to connect to module ground plane are
recommended.
In this way, the generated heat will be mostly conducted to the ground plane under the UE866; you must
ensure that your application can dissipate it.

NOTE:
The average consumption during transmissions depends on the power level at
which the device is requested to transmit by the network. The average current
consumption hence varies significantly.

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Power Supply PCB layout Guidelines

As seen on the elec trical design guidel ines the power supp ly shall have a lo w ESR capacitor on the
output to cut the current peaks on the input to protect the s upply from spikes The placement of this
component is crucial f or th e c orr ec t working of the circuitr y. A misplaced com ponent can be useless or
can even decrease the power supply performances.

• The Bypass low ESR capacitor must be placed close to the Telit UE866 power input pads or in
the case the power suppl y is a switching t ype it can be placed clos e to the inductor to cut the
ripple provided the PCB t race from the capacitor to the UE866 is wide enough to ensure a
dropless connection even dur ing an 1A curre nt p eak.

• The protection diode must be placed c lose to the inpu t connector where t he power source is
drained.

• The PCB traces from the input c onnector to the power regulator IC m ust be wide enough to
ensure no voltage drops occur when an 1A current peak is absorbed.

• The PCB traces to the UE866 and the Bypass capacitor must be wide eno ugh to ensure no
significant voltage drops occ ur. T his is f or th e sam e re ason as pre vious point. T ry to k eep th is
trace as short as possible.

• To reduce the EMI du e to s witc hing, it is important t o k eep ver y sm all the m es h invo lved; thus
the input capacitor, the o ut put dio de (if not em bodied i n the IC) and th e regu lator have to f orm
a very small loop.This is done in order to reduce the radiated field (n oise) at the switching
frequency (100-500 kHz usually).

• A dedicated ground for the Switching regulator separated by the common ground plane is
suggested.

• The placement of the po wer supply on the board sho uld be done in such a way to guarantee
that the high current return paths in the ground plane are not overlapped to any noise sensitive
circuitry as the microphone amplifier/buffer or earphone amplifier.

• The power supply input cables should be kept separate from noise sensitive lines such as
microphone/earphone cables.

• The insertion of EMI filter on VBATT pins is suggested in those designs where antenna is
placed close to battery or supply lines.
A ferrite bead like Murata BLM18EG101TN1 or Taiyo Yuden P/N FBMH1608HM101 can be
used for this purpose.

The below figure shows the recommended circuit:

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4.4 RTC Bypass out

The VRTC pin brings out the Real Time Clock supply, which is separate from the rest of the digital
part, allowing having only RTC going on when all the other parts of the device are off.
To this power output a backup capacitor can be added in order to increase the RTC autonomy during
power off of the battery. NO Devices must be powered from this pin.

In order to keep the RTC active when VBATT is not supplied it is possible to back up the RTC section
connecting a backup circuit to the related VRTC signal (pad F5 on module’s Pinout).

For additional details on the Backup solutions please refer to the related application note (RTC
Backup Application Note)

4.5 VAUX Power Output

A regulated power supply output is provided in order to supply small devices from the module. The
signal is present on Pad G6 and it is in common with the PWRMON (module powered ON indication)
function.
This output is always active when the module is powered ON.

The operating range characteristics of the supply are:

Item

Min

Typical

Max

Output voltage

1.77V

1.80V

1.83V

Output current - -

60mA

Output bypass

capacitor

(inside the module)

22uF

NOTE:
The Output Current MUST never be exceeded; care must be taken when
designing the application section to avoid having an excessive current
consumption.
If the Current is exceeding the limits it could cause a Power Off of the module.

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5 DIGITAL SECTION

5.1 Logic Levels Speci fication

ABSOLUTE MAXIMUM RATINGS – NOT FUNCTIONAL:

OPERATING RANGE - INTERFACE LEVELS (1.8V CMOS):

Parameter

Min

Max

Input high level

1.5V

1.9V

Input low level

0V

0.35V

Output high level

1.6V

1.9V

Output low level

0V

0.2V

CURRENT CHARACTERISTICS:

Parameter

AVG

Output Current

1mA

Input Current

1uA

Parameter

Min

Max

Input level on any digital pin (CMOS 1.8) with respect to ground

-0.3V

2.1V

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5.2 Power on

The UE866 will automatically power on itself when VBATT & VBATT_PA are applied to the module.
VAUX / PWRMON pin will be at the high logic level and the module can be considered fully operating
after 5 seconds. The following flow chart shows the proper turn on procedure:

NOTE:
The power supply must be applied either at the same time on pins VBATT and
VBATT_PA.
To guarantee a correct module’s start-up please check that the Power Supply
is with a level >3.22V within 21mS.

PWRMON=ON

?

“Modem ON Proc”

START

PWR Supply ON

& > 3.22V?

PWRMON=ON

?

Delay = 300 ms

AT Init Sequence

Enter AT<CR>

N

Delay 1s – 5s for Low Voltage

Operating

Y

Y

N

Y

Delay = 1 sec

N

Start AT CMD

AT Answer in

1sec?

Modem Reset Proc

N

Y

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A flow chart showing the AT commands managing procedure is displayed below:

NOTE:
In order to avoid a back powering effect it is recommended to avoid having any
HIGH logic level signal applied to the digital pins of the UE866 when the
module is powered off or during an ON/OFF transition.

“Start AT CMD”

START

Delay = 300 msec

Enter AT <CR>

Disconnect PWR Supply

AT answer in

1 sec ?

GO TO

“Modem ON Proc.”

“Start AT CMD”

END

Y

N

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WARNING:
It is recommended to power on the module only after VBATT is higher than 3.22V.
The maximum rump up time for VBATT is 21mS.
In case this condition it is not satisfied you could use the HW_SHUTDOWN* line to recover it.

An example of this is described in the following diagram:

After RESET* is released the module will automatically power on itself.

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5.3 Power off

The following flowchart shows the proper Turn-off procedure:

In order to avoid a back powering effect it is recommended to avoid having any
HIGH logic level signal applied to the digital pins of the UE866 when the
module is powered off or during an ON/OFF transition.

“Modem OFF Proc”

AT#SYSHALT

10s Timeout

Disconnect PWR Supply

“Modem ON Proc.”

Delay 1.5s

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5.4 Reset

To unconditionally reboot the UE866, the pad RESET* must be tied low for at least 200 milliseconds
and then released.
The maximum current that can be drained from the RESET* pad is 0,15 mA.
The hardware unconditional Restart must not be used during normal operation of the device since it
does not detach the device from the network. It shall be kept as an emergency exit procedure to be
done in the rare case that the device gets stuck waiting for some network or SIM responses.

Do not use any pull up resistor on the RESET* line nor any totem pole digital output. Using pull up
resistor may bring to latch up problems on the UE866 power regulator and improper functioning of the
module.
The line RESET* must be connected only in open collector configuration; the transistor must be
connected as close as possible to the RESET* pin.

The unconditional hardware restart must always be implemented on the boards and the software must
use it as an emergency exit procedure.

PIN DESCRIPTION

Signal

Function

I/O

PAD

RESET*

Unconditional Shutdown of the Module

I

G4

OPERATING LEVELS

Signal Status

Min

Max

RESET* Input high

1.5V

1.9V

RESET* Input Low

0V

0.35V

WARNING:
The hardware unconditional Shutdown must not be used during normal
operation of the device since it does not detach the device from the network. It
shall be kept as an emergency exit procedure.

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A typical circuit is the following:

NOTE:
In order to avoid a back powering effect it is recommended to avoid having any
HIGH logic level signal applied to the digital pins of the UE866 when the
module is powered off or during an ON/OFF transition.

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In the following flow chart is detailed the pr oper restart procedure:

NOTE:
Do not use any pull up resistor on the HW_SHUTDOWN* line nor any totem
pole digital output. Using pull up resistor may bring to latch up problems on the
UE866 power regulator and improper functioning of the module.
To proper power on again the module please refer to the related paragraph
(“Power ON”)
The unconditional hardware shutdown must always be implemented on the
boards and should be used only as an emergency exit procedure.

Modem RESET

Proc.

RESET* = LOW

Delay = 200ms

Start At CMD

RESET* = HIGH

Delay = 1s

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5.5 C om munication ports

USB 2.0 HS

The UE866 includes one integrated universal serial bus (USB 2.0 HS) transceiver.
The following table is listing the available signals:

PAD

Signal

I/O

Function

Type

NOTE

E5

USB_D+

I/O

USB differential Data (+)

3.3V

E6

USB_D-

I/O

USB differential Data (-)

3.3V

D4

VUSB AI

Power sense for the internal USB
transceiver.

5V

Accepted range:

4.4V to 5.25V

The USB_DPLUS and USB_DMINUS signals have a clock rate of 480 MHz.
The signal traces should be routed carefully. Trace lengths, number of vias and capacitive loading
should be minimized. The characteristic impedance value should be as close as possible to 90 Ohms
differential.
In case there is a need to add an ESD protection, the suggested connection is the following:

NOTE:
VUSB pin should be disconnected before activating the Power Saving Mode.

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SPI

The UE866 Module is pro vided b y one SPI interf ac e.
The SPI interface defines two handshake lines for flow control and mutual wake-up of the modem and
the Application Processor: SRDY (slave ready) and MRDY (master ready).
The AP has the master role, that is, it supplies the clock.
The following table is listing the available signals:

PAD

Signal

I/O

Function

Type

NOTE

C1

SPI_MOSI

I

SPI MOSI

CMOS 1.8V

Shared with TX_AUX

C2

SPI_MISO

O

SPI MISO

CMOS 1.8V

Shared with RX_AUX

F11

SPI_CLK I SPI C l oc k CMOS 1.8V

D11

SPI_MRDY I SPI_MRDY CMOS 1.8V

E11

SPI_SRDY O SPI_SRDY CMOS 1.8 V

NOTE:
Due to the shared functions, when the SPI port is used, it is not possible to use
the AUX_UART port.

SPI Connections

SPI MISO

SPI MOSI

SPI CLK

SPI MRDY

SPI SRDY

C2

C1

F11

D11

E11

UE866

AP

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Serial Ports

The UE866 module is provided with by 2 Asynchronous serial ports:

• MODEM SERIAL PORT 1 (Main)

• MODEM SERIAL PORT 2 (Auxiliary)

Several configurations can be designed for the serial port on the OEM hardware, but the most common
are:

• RS232 PC com port

• microcontroller UART @ 1.8V (Universal Asynchronous Receive Transmit)

• microcontroller UART @ 5V or other voltages different from 1.8V

Depending from the type of serial port on the OEM hardware a level translator circuit may be needed to
make the system work.
On the UE866 the ports are CMOS 1.8.

MODEM SERIAL PORT 1 (USIF0)

The serial port 1 on the UE866 is a +1.8V UART with all the 7 RS232 signals.
It differs from the PC-RS232 in the signal polarity (RS232 is reversed) and levels.

The following table is listing the available signals:

RS232

Pin

Signal

Pad

Name

Usage

1 C109/DCD

B2

Data Carrier Detect

Output from the UE866 that indicates
the carrier presence

2 C104/RXD

A5

Transmit line *see
Note

Output transmit line of UE866 UART

3 C103/TXD

A4

Receive line *see
Note

Input receive of the UE866 UART

4 C108/DTR

A2

Data Terminal Ready

Input to the UE866 that controls the DTE
READY condition

5 GND

D1, F1, G1,

D2, F2, C3,
E3, F3, G3,
F6, A8, G8,

A11, G11

Ground Ground

6 C107/DSR

A2

Data Set Ready

Output from the UE866 that indicates
the module is ready

7 C106/CTS

A1

Clear to Send

Output from the UE866 that controls the
Hardware flow control

8 C105/RTS

B1

Request to Send

Input to the UE866 that controls the
Hardware flow control

9 C125/RING

B3

Ring Indicator

Output from the UE866 that indicates
the incoming call condition

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The following table shows the typical input value of internal pu ll-up resistors for RTS, DTR and TXD
input lines and in all module states:

STATE

RTS DTR TX D

Pull up tied to

ON

5K to 12K

1V8

OFF Schottky diode

RESET

Schottky diode

POWER SAVING

5K to 12K

1V8

The input line ON_OFF and HW_SHDN state can be treated as in picture below

NOTE:
According to V.24, some signal names are referred to the application side,
therefore on the UE866 side these signal are on the opposite direction:
TXD on the application side will be connected to the receive line (here named
C103/TXD)
RXD on the application side will be connected to the transmit line (here named
C104/RXD)

For a minimum implementation, only the TXD, RXD lines can be connected,
the other lines can be left open provided a software flow control is
implemented.

In order to avoid a back powering effect it is recommended to avoid having any
HIGH logic level signal applied to the digital pins of the UE866 when the
module is powered off or during an ON/OFF transition.

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MODEM SERIAL PORT 2 (USIF1)

The secondary serial port on the UE866 is a CMOS1.8V with only the RX and TX signals.
The signals of the UE866 serial port are:

PAD

Signal

I/O

Function

Type

NOTE

C1

TX_AUX O

Auxiliary UART (TX Data to
DTE)

CMOS 1.8V Shared with SPI_MOSI

C2

RX_AUX I

Auxiliary UART (RX Data
from DTE)

CMOS 1.8V Shared with SPI_MISO

NOTE:
Due to the shared pins, when the Modem Serial port is used, it is not possible
to use the SPI functions.

In order to avoid a back powering effect it is recommended to avoid having any
HIGH logic level signal applied to the digital pins of the UE866 when the
module is powered off or during an ON/OFF transition.

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RS232 LEVEL TRANSLATION

In order to interface the UE866 with a PC com port or a RS232 (EIA/TIA-232) application a level
translator is required. This level translator must:

• invert the electrical signal in both directions;

• Change the level from 0/1.8V to +15/-15V.

Actually, the RS232 UART 16450, 1655 0, 16 650 & 1 6750 ch ipsets accept s igna ls with l ower l evels o n
the RS232 side ( EIA/TIA-562), allowing a lower voltage-m ultiplying ratio on th e level translator. N ote
that the negative signal voltage must be less than 0V and hence some sort of level translation is always
required.
The simplest way to transl ate the levels and inv ert the signal is b y using a single c hip level translat or.
There are a multitude of them, differing in the number of drivers and receivers and in the levels (be sure
to get a true RS232 level translator not a RS485 or other standards).
By convention the dr iver is the level tra nslat or f rom t he 0-1.8 V U ART to t he RS23 2 level. T he recei ver
is the translator from the RS232 level to 0-1.8V UART.
In order to translate the whole set of control lines of the UART you will need:

• 5 drivers

• 3 receivers

An example of RS232 level adaptation circuitry could be done using a MAXIM transceiver (MAX218)
In this case the chipset is capable to translate directly from 1.8V to the RS232 levels (Example done
on 4 signals only).

The RS232 serial port lines are usually connected to a DB9 connector with the following layout:

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5.6 General Purpose I/O

The UE866 module is pro vided b y a set of Configurable Digital Input / Output pins (CMOS 1.8V)
Input pads can only be read; they report the digital value (high or low) present on the pad at the read
time.
Output pads can only be written or queried and set the value of the pad output.
An alternate function pad is internally controlled by the UE866 firmware and acts depending on the
function implemented.

The following table shows the available GPIO on the UE866:

PAD

Signal

I/O

Drive

Strength

Default

State

NOTE

C5

GPIO_01 I/O

1 mA

INPUT

Alternate function Digital Audio
Interface (WA0

C6

GPIO_02 I/O

1 mA

INPUT

Alternate functions Jammer Detect Report

/ Digital Audio Interface (RX)

D6

GPIO_03 I/O

1 mA

INPUT

Alternate function Digital Audio
Interface (TX)

D5

GPIO_04 I/O

1 mA

INPUT

Alternate function

TX Disable / Digital Audio Interface

(CLK)

B5

GPIO_05

I/O

1 mA

INPUT

B4

GPIO_06

I/O

1 mA

INPUT

Alternate function ALARM

C4

GPIO_07

I/O

1 mA

INPUT

Alternate function STAT LED

NOTE:
The internal GPIO’s pull up/pull down could be set to the preferred status for
the application using the AT#GPIO command.
Please refer for the AT Commands User Guide for the detailed command
Syntax.

WARNING:
During power up the GPIOs may be subject to transient glitches.

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Also the UART’s control flow pins can be usable as GPIO:

PAD

Signal

I/O

Input/output

current

Default

State

ON_OFF

state

Reset

State

NOTE

B2 GPO_A O 1uA/1mA INPUT 0 0

Alternate function
C109/DCD

B3 GPO_B O 1uA/1mA INPUT 0 0

Alternate function
C125/RING

A3 GPO_C O 1uA/1mA INPUT 0 0

Alternate function
C107/DSR

A2 GPI_E I 1uA/1mA INPUT 0 0

Alternate function
C108/DTR

A1 GPI_F I 1uA/1mA INPUT 0 0

Alternate function
C105/RTS

B1 GPO_D O 1uA/1mA INPUT 0 0

Alternate function
C106/CTS

Using a GPIO as INPUT

The GPIO pads, when used as inputs, can be connected to a digital output of another device and
report its status, provided this device has interface levels compatible with the 1.8V CMOS levels of the
GPIO.
If the digital output of the device to be connected with the GPIO input pad has interface levels different
from the 1.8V CMOS, then it can be buffered with an open collector transistor with a 47K pull up to

1.8V.

NOTE:
In order to avoid a back powering effect it is recommended to avoid having any
HIGH logic level signal applied to the digital pins of the UE866 when the
module is powered off or during an ON/OFF transition.
The V_AUX / PWRMON pin can be used for input pull up reference or/and for
ON monitoring.

Using a GPIO as OUTPUT

The GPIO pads, when used as outputs, can drive 1.8V CMOS digital devices or compatible hardware.
When set as outputs, the pads have a push-pull output and therefore the pull-up resistor may be
omitted.

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Indication of network service availability

The STAT_LED pin status shows information on the network service availability and Call status.
The function is availab le as alternate function of GPIO_07 (to be enabled usin g the AT#GPIO=7,0,2
command).
In the UE866 modules, the STAT_LED needs an external transistor to drive an external LED.
Therefore, the status indicated in the following table is reversed with respect to the pin status.

Device Status

Led Status

Device off

Permanently off

Not Registered

Permanently on

Registered in idle

Blinking 1sec on + 2 sec off

Registered in idle + power saving

It depends on the event that

triggers the wakeup (In sync with
network paging)

Voice Call Active

Permanently on

Dial-Up Blinking 1 sec on + 2 sec off

A schematic example could be:

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SIMIN Detection

All the GPIO pins can be used as SIM DETECT input. The AT Command used to enable the function
is:

AT#SIMINCFG

Use the AT command AT#SIMDET=2 to enable the SIMIN detection
Use the AT command AT&W0 and AT&P0 to store the SIMIN detection in the common profile.

NOTE:
Don’t use the SIM IN function on the same pin where the GPIO function is
enabled and vice versa!

5.7 External SIM Hold er

Please refer to the related User Guide (SIM Holder Design Guides, 80000NT10001a).

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5.8 ADC Converter

The UE866 is provided by one AD converter. It is able to read a voltage level in the range of 0÷1.2
volts applied on the ADC pin input, store and convert it into 10 bit word.
The input line is named as ADC_IN1 and it is available on Pad F4

The following table is showing the ADC characteristics:

Item

Min

Typical

Max

Unit

Input Voltage range

0 - 1.2

Volt

AD conversion

- - 10

bits

Input Resistance

1 - -

Mohm

Input Capacitance -

1

- pF

The ADC could be controlled using an AT command.
The command is AT#ADC=1,2
The read value is expressed in mV

Refer to SW User Guide or AT Commands Reference Guide for the full description of this function.

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5.9 D A C Converter

The UE866 provides a Digital to Analog Converter. The signal (named DAC_OUT) is available on pin
E4 of the UE866.
The on board DAC is a 10 bit converter, able to generate an analogue value based on a specific input
in the range from 0 up to 1023. However, an external low-pass filter is necessary

The following table is showing the ADC characteristics:

Item

Min

Max

Unit

Voltage range (filtered) 0 1.8 Volt

Range 0 1023 Steps

The precision is 10 bits so, if we consider that the maximum voltage is 2V, the integrated voltage could
be calculated with the following formula:

Integrated output voltage = (2 *value) / 1023

DAC_OUT line must be integrated (for example with a low band pass filter) in order to obtain an
analog voltage.

Enabling DAC

An AT command is available to use the DAC function.
The command is: AT#DAC= [<enable> [, <value>]]

<value> - scale factor of the integrated output voltage (0..1023 - 10 bit precision)
it must be present if <enable>=1

Refer to SW User Guide or AT Commands Reference Guide for the full description of this function.

NOTE:
The DAC frequency is selected internally. D/A converter must not be used
during POWERSAVING.

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LOW Pass filter Example

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6 RF SECTION

6.1 Bands Variants

The following table is listing the supported Ban ds :

6.2 TX Output Power

Product

Supported 2G bands

UE866-N3G

-

UE866-EU

GSM900, DCS1800

Product

Supported 3G bands

UE866-N3G

FDD B2, B5

UE866-EU

FDD B1, B8

Band

Power Class

GSM 900

Class 4 (2W)

DCS 1800

Class 1 (15W)

FDD B1, B8

Class 3 (0.25W)

FDD B2, B5

Class 3 (0.25W)

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6.3 RX Sensitivity

Band

Sensitivity

GSM 900

-109dBm

DCS 1800

-110dBm

FDD B1, B8

-111dBm

FDD B2, B5

-110dBm

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6.4 Antenna Requir em ents

The antenna connection and board layout design are the most important aspect in the full product
design as they strongly affect the product overall performances, hence read carefully and follow the
requirements and the guidelines for a proper design.
The antenna and antenna transmission line on PCB for a Telit UE866 device shall fulfil the following
requirements:

PCB design guidelines

When using the UE866, since there's no antenna connector on the module, the antenna must be
connected to the UE866 antenna pad by means of a transmission line implemented on the PCB.
In the case the antenna is not directly connected at the antenna pad of the UE866, then a PCB line is
needed in order to connect with it or with its connector .
This transmission line shall fulfil the following requirements:

Item

Value

Frequency range

Depending by frequency band(s) provided by the network

operator, the customer shall use the most suitable antenna for

that/those band(s)

Bandwidth

80 MHz in GSM900
170 MHz in DCS

Bandwidth (WCDMA)

70 MHz in WCDMA Band V

140 MHz in WCDMA Band II
250 MHz in WCDMA B I

80 MHz in WCDMA B VIII

Impedance

50 ohm

Input power

>33 dBm (2W) peak power in GSM
>24dBm Average power in WCDMA

VSWR absolute max

≤ 10:1 (limit to avoid permanent damage)

VSWR recommended

≤ 2:1 (limit to fulfill all regulatory requirements)

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The transmission line should be designed according to the following guidelines:

• Ensure that the antenna line impedance is 50 ohm;

• Keep the antenna line on the PCB as short as possible, since the antenna line loss shall be

less than 0,3 dB;

• Antenna line must have uniform characteristics, constant cross section; avoid meanders and
abrupt curves;

• Keep, if possible, one layer of the PCB used only for the Ground plane;

• Surround (on the sides, over and under) the antenna line on PCB with Ground, avoid having

other signal tracks facing directly the antenna line track;

• The ground around the antenna line on PCB has to be strictly connected to the Ground Plane
by placing vias every 2mm at least;

• Place EM noisy devices as far as possible from UE866 antenna line;

• Keep the antenna line far away from the UE866 power supply lines;

• If you have EM noisy devices around the PCB hosting the UE866, such as fast switching ICs,

take care of the shielding of the antenna line by burying it inside the layers of PCB and
surround it with Ground planes, or shield it with a metal frame cover.

• If you don't have EM noisy devices around the PCB of UE866, by using a micro strip on the
superficial copper layer for the antenna line, the line attenuation will be lower than a buried
one;

Item

Value

Characteristic Impedance

50 ohm

Max Attenuation

0,3 dB

Coupling

Coupling with other signals shall be avoided

Ground Plane

Cold End (Ground Plane) of antenna shall be equipotential to
the UE866 ground pins

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The following image is showing the suggested layout for the Antenna pad

connection:

PCB Guidelines in case of FCC Certificatio n

In the case FCC certification is required for an application using UE866-N3G, according to FCC KDB
996369 for modular approval requirements, the transmission line has to be similar to that implemented
on UE866 interface board and described in the following chapter.

Transmission line design

During the design of the UE866 interface board, the placement of components has been chosen
properly, in order to keep the line length as short as possible, thus leading to lowest power losses
possible. A Grounded Coplanar Waveguide (G-CPW) line has been chosen, since this kind of
transmission line ensures good impedance control and can be implemented in an outer PCB layer as
needed in this case. A SMA female connector has been used to feed the line.
The interface board is realized on a FR4, 4-layers PCB. Substrate material is characterized by relative
permittivity ε

r

= 4.6 ± 0.4 @ 1 GHz, TanD= 0.019 ÷ 0.026 @ 1 GHz.

A characteristic impedance of nearly 50 Ω is achieved using trace width = 1.1 mm, clearance from

coplanar ground plane = 0.3 mm each side. The line uses reference ground plane on layer 3, while
copper is removed from layer 2 underneath the line. Height of trace above ground plane is 1.335 mm.

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Calculated characteristic impedance is 51.6 Ω, estimated line loss is less

than 0.1 dB. The line geometry is shown below:

Transmission Line Measurements

An HP8753E VNA (Full-2-port calibration) has been used in this measurement session.
A calibrated coaxial cable has been soldered at the pad corresponding to RF output; a SMA connector
has been soldered to the board in order to characterize the losses of the transmission line including
the connector itself. During Return Loss / impedance measurements, the transmission line has been
terminated to 50 Ω load.
Return Loss plot of line under test is shown below:

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Line input impedance (in Smith Chart format, once the line has been terminated to 50 Ω load) is

shown in the following figure:

Insertion Loss of G-CPW line plus SMA connector is shown below:

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Antenna Installation Guidelines

Install the antenna in a place covered by the WCDMA signal.
If the device antenna is located farther than 20cm from the human body and there are no co-located
transmitter then the Telit FCC/IC approvals can be re-used by the end product.
If the device antenna is located closer than 20cm from the human body or there are co-located
transmitter then the additional FCC/IC testing may be required for the end product (Telit FCC/IC
approvals cannot be reused).
Antenna shall not be installed inside metal cases.
Antenna shall be installed also according to antenna manufacturer instructions.

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7 AUDIO SECTION

7.1 Overview

The UE866 is provided by one Digita l A ud io Interface.

7.2 D igi tal Voice Int erface

The UE866 Module is provided by one DVI digital voice interface.
The Signals are available on the following Pads and alternate function of the GPIOs:

PAD

Signal

I/O

Function

C5

DVI_WA0

I/O

Digital Voice Interface (Word Alignment / LRCLK)

C6

DVI_RX

I

Digital Voice Interface (RX)

D6

DVI_TX

O

Digital Voice Interface (TX)

D5

DVI_CLK

I/O

Digital Voice Interface (BCLK)

CODEC Examples

Please refer to the Digital Audio Application note.

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8 MECHANICAL DESIGN

8.1 Drawing

In case of UE866-EU shield mechanical design slightly differs from UE866 other variants, but overall
dimensions are the same and there is no impact on assembling and footprint area.

Pin A1

Dimensions in mm

Lead-free Alloy:

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9 APPLICATION DESIGN

The UE866 modules have been designed in order to be compliant with a standard lead-free SMT
process.

9.1 Footprint

In order to easily rework the UE866 is suggested to consider on the application a 1.5 mm placement
inhibit area around the module.
It is also suggested, as common rule for an SMT component, to avoid having a mechanical part of the
application in direct contact with the module.

NOTE:
In the customer application, the region under WIRING INHIBIT (see figure
above) must be clear from signal or ground paths.

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9.2 PCB pad design

Non solder mask defined (NSMD) type is recommended for the solder pads on the PCB.

9.3 PCB pad dimensions

The recommendation for the PCB pads dimensions are described in the following image (dimensions
in mm)

Solder resist openings

PCB

Copper Pad Solder Mask

SMD

(Solder Mask Defined)

NSMD

(Non Solder Mask Defined)

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It is not recommended to place via or micro-via not covered by solder resist in an area of 0,3 mm
around the pads unless it carries the same signal of the pad itself

(see following figure).

Holes in pad are allowed only for blind holes and not for through holes.

Recommendations for PCB pad surfaces:

Finish

Layer Thickness (um)

Properties

Electro-less Ni / Immersion Au 3 –7 / 0.05 – 0.15

good solder ability protection,

high shear force values

The PCB must be able to resist the higher temperatures which are occurring at the lead-free process.
This issue should be discussed with the PCB-supplier. Generally, the wettability of tin-lead solder
paste on the described surface plating is better compared to lead-free solder paste.
It is not necessary to panel the application’s PCB, however in that case it is suggested to use milled
contours and predrilled board breakouts; scoring or v-cut solutions are not recommended.

Inhibit area for micro-via

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9.4 Stencil

Stencil’s apertures layout can be the same of the recommended footprint (1:1), we suggest a
thickness of stencil foil ≥ 120 µm.

9.5 Solder paste

Item

Lead Free

Solder Paste Sn/Ag/Cu

We recommend using only “no clean” solder paste in order to avoid the cleaning of the modules after
assembly.

9.6 Solder reflow

Recommended solder reflow profile:

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Profile Feature

Pb-Free Assembly

Average ramp-up rate (TL to TP)

3°C/second max

Preheat

– Temperature Min (Tsmin)
– Temperature Max (Tsmax)

– Time (min to max) (ts)

150°C
200°C

60-180 seconds

Tsmax to TL
– Ramp-up Rate

3°C/second max

Time maintained above:

– Temperature (TL)
– Time (tL)

217°C
60-150 seconds

Peak Temperature (Tp)

245 +0/-5°C

Time within 5°C of actual Peak
Temperature (tp)

10-30 seconds
Ramp-down Rate

6°C/second max.

Time 25°C to Peak Temperature

8 minutes max.

NOTE:
All temperatures refer to topside of the package, measured on the package
body surface

WARNING:
The UE866 module withstands one reflow process only.

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10 PACKAGING

10.1 Tray

The UE866 modules are packaged on trays of 70 pieces each. These trays can be used in SMT
processes for pick & place handling.

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10.2 Moisture sensitivity

The UE866 is a Moisture Sensitive Device level 3, in according with standard IPC/JEDEC J-STD-020,
take care all the relatives requirements for using this kind of components.
Moreover, the customer has to take care of the following conditions:
a) Calculated shelf life in sealed bag: 12 months at <40°C and <90% relative humidity (RH).
b) Environmental condition during the production: 30°C / 60% RH according to IPC/JEDEC J-STD­033A paragraph 5.
c) The maximum time between the opening of the sealed bag and the reflow process must be 168
hours if condition b) “IPC/JEDEC J-STD-033A paragraph 5.2” is respected
d) Baking is required if conditions b) or c) are not respected
e) Baking is required if the humidity indicator inside the bag indicates 10% RH
or more

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11 SAFETY

RECOMMANDATIONS

READ CAREFULLY
Be sure the use of this product is allowed in the country and in the environment required. The use of
this product may be dangerous and has to be avoided in the following areas:
Where it can interfere with other electronic devices in environments such as hospitals, airports,
aircrafts, etc
Where there is risk of explosion such as gasoline stations, oil refineries, etc
It is responsibility of the user to enforce the country regulation and the specific environment regulation.

The equipment is intended to be installed in restricted area locations.
Do not disassemble the product; any mark of tampering will compromise the warranty validity.
We recommend following the instructions of the hardware user guides for a correct wiring of the
product. The product has to be supplied with a stabilized voltage source and the wiring has to be
conforming to the security and fire prevention regulations.
The product has to be handled with care, avoiding any contact with the pins because electrostatic
discharges may damage the product itself. Same cautions have to be taken for the SIM, checking
carefully the instruction for its use. Do not insert or remove the SIM when the product is in power
saving mode.
The system integrator is responsible of the functioning of the final product; therefore, care has to be
taken to the external components of the module, as well as of any project or installation issue,
because the risk of disturbing the GSM network or external devices or having impact on the security.
Should there be any doubt, please refer to the technical documentation and the regulations in force.

Every module has to be equipped with a proper antenna with specific characteristics. The antenna has
to be installed with care in order to avoid any interference with other electronic devices and has to
guarantee a minimum distance from the body (20 cm). In case of this requirement cannot be satisfied,
the system integrator has to assess the final product against the SAR regulation.

Maximum ambient working temperature for the standard IEC 60950-1: +60 ºC.

The European Community provides some Directives for the electronic equipments introduced on the
market. All the relevant information’s are available on the European Community website:

http://europa.eu.int/comm/enterprise/rtte/dir99-5.htm

The text of the Directive 99/05 regarding telecommunication equipments is available, while the
applicable Directives (Low Voltage and EMC) are available at:

http://europa.eu.int/comm/enterprise/electr_equipment/index_en.htm

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12 FCC/IC REGULATORY

NOTICES

Modification statement
Telit has not approved any changes or modifications to this device by the user. Any changes or
modifications could void the user’s authority to operate the equipment.

Telit n’approuve aucune modification apportée à l’appareil par l’utilisateur, quelle qu’en soit la nature.
Tout changement ou modification peuvent ann ul er le dr oit d’util isation de l’appareil par l’utilisateur.

Interference statement
This device complies with Part 15 of the FCC Rules and Industry Canada licence-exempt RSS
standard(s). Operation is subject to the following two conditions: (1) this device may not cause
interference, and (2) this device must accept any interference, including interference that may cause
undesired operation of the device.

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio
exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit
pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique
subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

Wireless notice
This equipment complies with FCC and IC radiation exposure limits set forth for an uncontrolled
environment. The antenna should be installed and operated with minimum distance of 20 cm between
the radiator and your body. Antenna gain must be below:

Frequency Band

Gain

Band II (1900 MHz)

9.01 dBi

Band V (850 MHz)

7.76 dBd

This transmitter must not be co-located or operati ng in conjunc tio n with any other antenna or
transmitter.

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Cet appareil est conforme aux limites d'exposition aux rayonnements de la IC pour un environnement
non contrôlé. L'antenne doit être installé de façon à garder une distance minimale de 20 centimètres
entre la source de rayonnements et votre corps. Gain de l'antenne doit être ci-dessous:

Bande de fréquence

Gain

Band II (1900 MHz)

9.01 dBi

Band V (850 MHz)

7.76 dBd

L'émetteur ne doit pas être colocalisé ni fonctionner conjointement avec à autre antenne ou autre
émetteur.

FCC Class B digital device notice
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.

Wireless notice IC

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. The
antenna should be installed and operated with minimum distance of 20 cm between the radiator and your body.

Antenna gain must be below:

Frequency Band

Gain

Band II (1900 MHz)

9.01 dBi

Band V (850 MHz)

4.96 dBd

This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

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Cet appareil est conforme aux limites d'exposition aux rayonnements de la
IC pour un environnement non contrôlé. L'antenne doit être installé de façon
à garder une distance minimale de 20 centimètres entre la source de rayonnements et votre corps.
Gain de l'antenne doit être ci-dessous:

Bande de fréquence

Gain

Band II (1900 MHz)

9.01 dBi

Band V (850 MHz)

4.96 dBd

L'émetteur ne doit pas être colocalisé ni fonctionner conjointement avec à autre antenne ou autre
émetteur.

Labelling Requirements for the Host device
The host device shall be properly labelled to identify the modules within the host device. The
certification label of the module shall be clearly visible at all times when installed in the host device,
otherwise the host device must be labelled to display the FCC ID and IC of the module, preceded by
the words "Contains transmitter module", or the word "Contains", or similar wording expressing the
same meaning, as follows:

Contains FCC ID: RI7UE866N3
Contains IC: 5131A-UE866N3

L'appareil hôte doit être étiqueté comme il faut pour permettre l'identification des modules qui s'y
trouvent. L'étiquette de certification du module donné doit être posée sur l'appareil hôte à un endroit
bien en vue en tout temps. En l'absence d'étiquette, l'appareil hôte doit porter une étiquette donnant le
FCC ID et le IC du module, précédé des mots « Contient un module d'émission », du mot « Contient »
ou d'une formulation similaire exprimant le même sens, comme suit :

Contains FCC ID: RI7UE866N3
Contains IC: 5131A-UE866N3

CAN ICES-3 (B) / NMB-3 (B)
This Class B digital apparatus complies with Canadian ICES-003.

Cet appareil numérique de classe B est conforme à la norme canadienne ICES-003.

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13 DOCUMENT HISTORY

13.1 Revisions

Revision

Date

Changes

0

2014-09-19

Preliminary Version

1

2014-09-30

Updated Chapter 4.1; removed chapter 1.4

2

2014-10-03

Updated Chapter 4.1

3

2014-10-09

Updated Chapter 2, 3, 8.5

4

2015-01-08

Updated Document Template, Packaging, Flowcharts

5 2015-01-13

Added Safety Recommendations

Added FCC / IC Regulatory notices

Updated Chapter 2

6 2015-03-30

Updated chapters 4.2, 4.4, 4.5, 5.2, 5.8, 12
Added RX Sensitivity
Added Third Party Rights

7

2015-04-17

Updated Chapter 12

8

2015-06-29

Updated Chapter 8.1

9

2015-07-17

Updated Chapter 12

10 2016-07-27

Added UE866-EU reference

Updated Chapter 4, par 4.2

Updated Chapter 6

11 2016-09-21

Updated Chapter 11
Updated Chapter 4.3.1.4

12

2016-02-10

Updated Chapter 10