XECOM XE002B Datasheet

DAA with 2/4 Wire Hybrid

XE0002B

Features

• Small Size - 1.25" x 1.0" x 0.5"

• FCC Part 68 Compliant

• Ring Detection

• 2 to 4 Wire Converter

• 1500 Volt Isolation

• 800 Volt Surge Protection

• Hookswitch Control

Description

The XE0002B Data Access Arrangement provides a
'direct connect' telephone line interface. It complies
with FCC Part 68 hazardous voltage, surge and leakage
current specifications. This component may be used as
the direct connect telephone line interface for virtually
any application in which voice or data is to be
transmitted over the public switched telephone network.

The XE0002B provides high voltage isolation,
independent on/off hook control, ring detection circuitry
and a 2 to 4 wire converter hybrid for use in modem
applications. It operated from ±5 volt power supplies
and occupies 1.25 square inches of board space.

1 • 20
2
3
4 17
5
6
7 14
8 13
9 12
10 11

VDD
Vcc

RI

RCVR

XMIT

XMFR

T1

OH

GND

T2

TIP

RING

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

PIN CONFIGURATION

C A U T I O N

PINS 17 & 20 HAVE 1500V ISOLATION FROM THE REST OF

THE CIRCUITRY. THIS ISOLATION SHOULD BE

PRESERVED THROUGHOUT THE SYSTEM

XECOM

(Top View)

Block Diagram

Typical Connection Diagram

2/XECOM XE0002B

PIN NAME I/O DESCRIPTION

Pin Descriptions

1 VDD --- -5 Volts.
2 VCC --- +5 Volts
3 \RI O Ring Indicator, output, active LO, TTL. When low indicates the

modem is receiving a ring signal.

4 RCVR O Analog signal output from the 2-4 wire convertor.
5 XMIT I Analog signal input to the 2-4 wire convertor.

6 XMFR I Analog input/output from the Surge and Protective Network to the

internal 2-4 wire convertor. Must be tied to pin 7, T1, to use the

internal 2-4 wire convertor.
7 T1 I Analog Signal input/output to the Surge and Protective network.
8 OH I Off-Hook controls the hookswitch relay within the XE0002B. A high

on OH closes the internal relay and connects the equipment to the

telephone line.
9 GND --- Ground.

10 T2 I Analog Signal input/output to the Surge and Protective network.
17 RING --- Ring connection to the phone line (RJ11 pin4) from the internal DAA.

20 TIP --- Tip connection to the phone line (RJ11 pin3) from the internal DAA.

Mechanical Specifications

Connection Diagram With External 2-4 Wire Converter

XE0002B XECOM\3

INCHES METRIC(MM)

PIN MIN MAX MIN MAX

A 1.235 1.265 31.37 32.13
B 0.985 1.015 25.02 25.78
C 0.490 0.510 12.45 12.95
D 0.890 0.910 22.61 23.11
E 0.890 0.910 22.61 23.11
F 0.125 --- 3.18 --­G 0.040 0.060 1.02 1.52
H 0.165 0.185 4.19 4.70
J 0.090 0.110 2.29 2.79
K 0.020 0.025 0.51 0.64