Datasheet XE0068 Datasheet (XECOM)

XECOM (1) XE0068

XE0068

1/99

FCC Registered Phone Line Interface

Description

The XE0068 is a compact, FCC registered telephone
line interface. Designers can use the XE0068 in their
telecom designs without going through the time and
expense of FCC Part 68 Registration. This makes the
XE0068 perfect for low volume and prototype designs.

To attain FCC part 68 Registration on the XE0068,
Xecom was required to control the output level to the
telephone line and provide a 2-second billing delay.
Xecom designed an Automatic Gain Control circuit to
meet FCC rules limiting transmit level. Xecom's Auto­matic Gain Control circuit optimizes a wide range of in­put signal levels for placement on the telephone line.

The XE0068 can support data, fax, voice, and DTMF
signalling applications.

Features

* Small Size - 1.75" x 1.08" x 0.42";
* User Transferrable FCC Part 68 Registration;
* Ring Detection and Hookswitch Control;
* 1500 Volt Isolation;
* 800 Volt Surge Protection;
* Integrated supplemental lightening protection
* Integral 2-Second Billing Delay;
* Automatic Gain Control of transmit signal;
* Integral 2 to 4 wire convertor;
* Suitable for broad bandwidth applications;

Ring

Detect

Hook­switch

Control

Billing
Delay

2 to 4 wire

convertor

AGC

XMIT

RCVR

D/V

TIP

RING

RI

OH

Line

Transformer

BLOCK DIAGRAM

XECOM (2) XE0068

A

B

Denotes Pin 1

C

D

G

J

H

E

F

K

Inches Metric(MM)

Dim Min Max Min Max

A 1.735 1.765 44.07 44.83
B 1.065 1.095 27.05 27.81
C 0.420 0.430 10.67 10.92
D 0.890 0.910 22.61 23.11
E 1.190 1.210 30.23 30.73

F 0.125 0.200 3.18 5.08
G 0.080 0.100 2.03 2.54
H 0.265 0.285 6.73 7.24

J 0.090 0.110 2.29 2.79

K 0.020 0.025 0.51 0.64

Pins are 0.025 inch square, tin plated.
Recommended PCB hole size is 0.056 inches (0.86 MM)

RJ11C

TIP
RING

+5V

RECEIVE SIGNAL

TRANSMIT SIGNAL

D/V

1

13

26
24

14

XE0068

3
4

22
21

19
18

RI

OH

RCVR
XMIT

System Controller

Signal
Source

Signal
Decoder

TPB270

Ferrite Beads

470 pFd

Mechanical Specifications

Typical Connection Diagram

XECOM (3) XE0068

VCC

1

13

D/V

26
24

22
21

19
18

14

TIP
RING
RI

OH

RCVR
XMIT

GND

XE0068

20

17
16
15

N/C

N/C

N/C
N/C

2
3
4
5
6
7
8
9

12

11

10

N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C

N/C

XE0068 PIN CONFIGURATION

PIN DESCRIPTIONS

PIN NAME I/O DESCRIPTION

1 VCC -- - +5 Volt power;

13 D/V I A TTL Low on Data/Voice selects a transmit level output of 0 dBm for voice or

DTMF signaling applications. A High on Data/Voice sets a maximum -9 d B m

transmit level for data transfer.
14 GND --- Ground reference for the XE0068;
18 XMIT I XMIT is the Analog input signal to the XE0068. The input impedance on XMIT is

typically 10 Kohms at 1800 Hz. Signals placed on XMIT less than 0 dBm will be

placed on the telephone line at a maximum of -9 dBm when the Data/Voice signal

is driven high and a maximum of 0 dBm when Data/Voice is driven low.
19 RCVR O RCVR is the Analog output signal from the 2-4 wire converter. The output imped-

ance of RCVR is typically 10 ohms at 1800 hz. The signal level on RCVR will be

within 1 dBm of the received signal level present on the telephone line.
21 OH I Hookswitch control. A High on OH closes the internal relay to connect the equipment

to the phone line.
22 RI O Ring Indicate, output, active low, TTL, indicates the modem is receiving a ring signal.
24 Ring --- Ring connection to the phone line (RJ11 Pin 4).

XECOM (4) XE0068

Supply Voltage +6.5 V olts
Storage Temperature Range -25O C to 85O C
Operating T emperature Range 0O C to 70O C
Lead Temperature 260O C
Maximum Soldering Duration 2 seconds

* Exceeding these levels may result in permanent damage to the device.

Electrical Specifications (VCC = +5.0 Volts + 5%; Ta = 0

o

C to +70o C)

Parameter Conditions Min Typ Max Units

Supply Current Off hook 16 20 mA
Line Impedance At 1000 Hz 540 600 660 Ohms
AGC Input Range Output level <-9dBm; D/V high -40 0 dBm
AGC Output Level D/V held high -20 -9 dBm
AGC Output Level D/V held low --11 0 dBm
Billing Delay OH activated 2.0 2.3 sec
Transhybrid Loss at 1000 Hz 40 dB
Receive Loss at 1000Hz -1.0 0.0 1.0 dB
Ring Detect Sensitivity Min. AC voltage between Tip & Ring 38 Vrms

Type B ringer

Ring Indicate Output Ring Voltage present on Tip & Ring 0.2 0.5 Volts
Voltage

Loop Current Switch ON: (off-hook) 2.0 3.0 Volts
Control Voltage OFF: (on-hook) 0.2 0.5 Volts

Loop Current Switch OFF-Hook 0.1 2.0 mA
Control Current

Loop Current OFF-Hook current draw from 0 20 100 mA

Absolute Maximum Ratings*

XECOM (5) XE0068

This product complies with Part 68 of the FCC Rules and Regulations. With each device shipped,there is a label which
contains, among other information, the FCC Registration Number and Ringer Equivalence Number

(REN) for this

product. You must, upon request, give this information to your telephone company.

Mounting this device in the final assembly must be made in such a manner as to preserve the high voltage protection
between the TIP/RING connection and the rest of the system. Typically, this may be accomplished by maintaining a
minimum spacing .100 mils between the TIP/RING trace to the RJ-11C Jack and low voltage portion of the system. No
additional circuitry may be attached between TIP/RING and the telephone line connection unless specifically allowed in
the rules.

The REN is useful to determine the quantity of devices you may connect to the telephone line and still have all of these
devices ring when the number is called. In most, but not all areas, the sum of the RENs of all devices connected to one
line should not exceed five (5.0). T o be certain of the number of devices you may connect to the line, as determined by
the REN, you should contact the local telephone company to determine the maximum REN for your calling area.

If your system causes harm to the telephone network, the telephone company may discontinue service temporarily. If
possible, they will notify you in advance. If advance notification is not practical, you will be notified as soon as possible.

Your telephone company may make changes in its facilities, equipment, operations or procedures that could affect
proper functioning of your equipment. If they do, you will be notified in advance to give you an opportunity to maintain
uninterrupted service.

If you experience trouble with the device, please contact XECOM an [phone] for information on obtaining
service or repairs. The telephone company may ask you to disconnect this device from the network until the problem has
been corrected or until you are sure that the device is not malfunctioning.

There are no repairs that can be made by the customer to the XE0068.

The device may not be used on coin service lines provided by the telephone company (this does not apply to private coin
telephone applications which use standard telephone lines). Connection to party lines is subject to state tariffs.

FCC Information

FCC Registration Number DWEUSA-75283-DP-W
Ringer Equivalence 0.5B
Telephone Jack RJ11C

XECOM (6) XE0068

Terms of Sale

Devices sold by XECOM are covered by the warranty provisions appearing in its Terms of Sale only. XECOM
makes no warranty, express, statutory, implied, or by description regarding the information set forth herein, or
regarding the freedom of the described devices from patent infringement. XECOM makes no warranty of
merchantability or fitness for any purposes. XECOM reserves the right to discontinue production and change
specifications and prices at any time and without notice. This product is intended for use in normal commercial
applications. Applications requiring extended temperature range, unusual environmental requirements, or high
reliability applications, such as military, medical life-support or life-sustaining equipment, are specifically not
recommended without additional processing and authorization by XECOM for such application.

Xecom assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xecom

Life Support Policy

Xecom's products are not authorized for use as Critical Components in Life Support Devices or Systems.

Life Support Devices or Systems are devices or systems which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions pro­vided in the labeling, can be reasonably expected to result in significant injury to the user.

A Critical Component is any component of a life support device or system whose failure to perform can be rea­sonably expected to cause failure of the life support device or system, or to affect its safety or effectiveness.

Copyright, Xecom © 1999
While Xecom, Inc. has made every effort to ensure that the information presented here is accurate, Xecom will not
be liable for any damages arising from errors or omission of fact. Xecom reserves the right to modify specifications
and/or prices without notice. Product mentioned herein are used for identification purposes only and may be trade­marks and/or registered trademarks of their respective companies.

Xecom

Incorporated
374 Turquoise Street, Milpitas, CA 95035
Ph:408-945 -6640 Fax:[phone]
Email: [email protected]