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Low-Profile, V.34 Compatible Telephone Line Interface
XE0017
05/99
Description
The XE0017 is fully-integrated, low-profile, highperformance telephone line interface module. It
complies with FCC Part 68 requirements for direct
connection to the public switched telephone network.
The XE0017 meets the technical requirements for data
transmission at rates up to 33,600 bps. It is also suitable
for fax and voice communications. The XE0017 was
specifically designed to be compatible with Rockwell
Socket Modems.
The XE0017 is a complete DAA. It includes a low
distortion telephone line transformer, ring detector,
hookswitch and 2-4 wire convertor. The 2-4 wire
convertor separates transmit and receive signals. The
XE0017 operates from a single +5 volt supply and fits in
a 0.260 inch high package.
Features
* Small Size:
0.95 inches by 0.925 inches by 0.260 inches
* FCC Part 68 Compliant
* V.34 compatible
* Compatible with Rockwell's Socket Modems
* 2 to 4 Wire Converter
* Ring Detection
* Single +5V Operation
* Hookswitch Control
* UL and CSA Recognized
* Extended Temperature Range Parts available
XE0017 Block Diagram
Tx
Rx
OH
RI
2 TO 4
WIRE
CONVERTER
SURGE
AND
PROTECTIVE
NETWORK
LINE
CURRENT
CIRCUIT
HOOK-
SWITCH
CONTROL
RING
DETECT
CIRCUIT
XECOM (1) XE0017
TIP
RING
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XE0017 Mechanical Specifications
Inches Millimeters
Dim Min Max Min Max
A 0.905 0.945 22.99 24.00
B 0.930 0.970 23.62 24.64
C 0.250 0.270 6.35 6.86
D 0.790 0.810 20.07 20.57
E 0.390 0.410 9.91 10.41
F 0.200 0.220 5.08 5.59
G 0.065 0.085 1.65 2.16
H 0.065 0.085 1.65 2.16
J 0.090 0.110 2.29 2.79
K 0.430 0.450 10.92 11.43
Pins are .010 by .020 inches.
All Pins are tin-plated for solderability
XE0017 Typical Connection Diagram
+5 Volts
Modem Analog
Front End
Transmit
Receive
9 Gnd Tip 1
8Tx Ring2
7 VCC
6 N/C OH 3
5 Rx /RI 4
XE0017
D
R1
R2
C
G
RV1
H
A
Denotes Pin 1
J
E
FB1
FB2
C1
K
B
F
RJ11
3
4
C2
/Ring
OHRLY
Recommended Parts
Designation Description
C1, C2 470 pFd, 3000 Volts (Sprague Part Number 30GA-T47)
R1, R2 10 ohm, 1/2 Watt
FB1, FB2 Ferrite Bead (TDK Part Number CB30-453215B)
RV1 Sidactor, Minimum breakover 260 Volts (Teccor Part Number P3100BA70)
XECOM (2) XE0017
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XE0017 Pin Configuration
Tip
Ring
OH
/RI
1
2
3
4
XE0017
Gnd
9
TX
8
VCC
7
N/C
6
RX
5
XE0017 Pin Descriptions
PIN NAME DESCRIPTION
1 Ring Ring connection to the phone line (RJ11 Pin 4). The Ring pin has 1500 volts isolation
from the rest of the circuitry. This isolation must be preserved throughout the system.
The XE0017 is not polarity sensitive.
2 Tip Tip Connection to the phone line (RJ11 Pin 3). The Tip pin has 1500 volts isolation
from the rest of the circuitry. This isolation must be preserved throughout the system.
3 OH Hookswitch relay control. A high on OH closes the internal relay and connects the equip-
ment to the telephone line.
4 /RI Ring Indicate, output, active low, TTL, indicates that the modem is receiving a ring sig-
nal. /RI provides a square wave representation of the Ring signal present at Tip and
Ring.
5 RX RX provides the analog output signal from the 2-4 wire converter of the XE0017.
6 N/C No Connection
7 VCC +5 Volt power source
8 TX TX provides the analog input signal to the 2-4 wire convertor of the XE0017.
9 GND Ground
XECOM (3) XE0017
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XE0017 Electrical Specifications (VCC= 5 Volts + 10%, Ta 0 to 70 C)
Parameter Conditions Min Typ Max Units
Power Supply Current XE0017 Off-hook 10 15 mA
XE0017 On-hook 5 10 mA
XE0017 Tx Insertion loss 600 Ohm Impedence, 1800 Hz 6.0 6.5 7.0 dB
XE0017 Rx Insertion loss 600 Ohm Impedance, 1800 Hz -0.50 0 0.50 dB
Line Impedance At 1800 Hz 540 600 660 ohms
XE0017 Transhybrid Loss 600 Ohm Impedance, 1800 Hz 18 23 dB
Total Harmonic Distortion 600 Ohm Impedance, 1800 Hz -72 -76 dB
Ring Detect Sensitivity Min. AC voltage between Tip & 38 150 Vrms
Ring Type B ringer
Ring Indicate Output Ring Voltage present on Tip 0.2 0.5 Volts
Voltage & Ring
Hook-Switch Control ON: (off-hook) 2.0 3.0 Volts
Voltage OFF: (on-hook) 0.2 0.5 Volts
Loop Current Switch 0.3 0.5 mA
Control Current
Loop Current Off-hook 20 100 mA
Abosulte Maximum Ratings
Storage Temperature -25oC to +85oC
Operating Temperature Range 0oC to +70oC
Maximum Lead T emperature 260oC
(soldering 2 seconds per wave)
XECOM (4) XE0017
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FCC Information
When developing a product to be connected to the telephone line, it is necessary to use a circuit described as a Data Access
Arrangement (DAA) which is approved by the appropriate governmental agency. In the US, for example, this agency is the Federal
Communications Commission (FCC), while in Canada it is the Department of Communications (DOC). These agencies test and
approve the product to ensure that it meets their specifications, thereby protecting the telephone system from damage and
protecting the user from high voltage transients (such as lightning strikes) which may come down the telephone line.
The XE0017 has been designed to meet all FCC Part 68 requirements for hazardous voltage, surge protection and leakage current.
If the system developed transmits data, or DTMF tones on the telephone line, the user must certify that the signals transmitted meet
basic FCC requirements for maximum transmission levels, out of band energy and billing delay . Full details may be obtained from
the FCC under Part 68 of the FCC Rules and Regulations, or in Title 47 of the Code of Federal Regulations, however the basic
requirements are as follows:
1. Maximum Transmit Level
For the normal “permissive” (standard) telephone line, equipment which transmits data (such as a modem) must not exceed a
transmission level of -9 dBm.
2. Out of Band Energy
Data equipment must not transmit “out of band” energy on the telephone line which exceeds the following limits:
Frequency Range Max. Power
200Hz to 3990Hz -9 dBm
3990Hz to 4005Hz -27 dBm
4005Hz to 16kHz -16 dBm
8kHz to 94kHz -47 dBm
86kHz to 270kHz -46 dBm
270kHz t o 6MHz -6 dBm
3. DTMF Transmission Level
If the system is capable of DTMF dialing, the maximum DTMF transmission level must be less than 0 dBm averaged over a 3
second interval.
4. Billing Delay
A delay of 2 seconds or greater is required after the time the XE0017 is taken “off hook” and before any information is transmitted.
This is required to ensure that billing information may be exchanged between telephone company central offices without
interference.
The user of the XE0017 must certify to the FCC that the final system meets the requirements of Part 68 which include the criteria
above as well as the high voltage protection provided by the XE0017. This is generally accomplished through an independent
testing lab which tesst the System and submits the proper paperwork to the FCC for approval. Since the XE0017 already comply
with FCC Part 68 rules, this is a relatively simple process.
XECOM (5) XE0017
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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 product.
No other circuits, patents, or licenses are implied.
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.
Incorporated
Xecom
374 Turquoise Street, Milpitas, CA 95035
Ph:408-945 -6640 Fax:408 -942-1346
Email: [email protected]
XECOM (6) XE0017
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