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XE014JS

PLCC DAA for Shared-Line Applications

Xecom 

XE014JS

10-99

PLCC DAA for Shared-Line Applications

Description

Xecom’s XE014JS is a complete DAA integrated into a

compact PLCC package. The XE014JS incorporates

features which permit equipment to share a host

telephone line. The PLCC package reduces the DAA

space requirements and permits automated, high-volume

assembly.

The XE014JS is targeted for remote monitoring

equipment which shares a host telephone line such as set

top boxes and automated utility meters. The XE014JS

includes a pair of circuits which prevent the equipment

from interfering with host calls. The Connect Detect

circuit monitors line activity and indicates when the host

telephone line is in use. By monitoring this signal the

equipment avoids interruption of a host call in progress.

The handset interrupt circuit monitors the host telephone

line for interruptions while the equipment is on-line. this

permits the equipment to drop the call in progress if the

host picks-up the telephone line.

Like all Xecom DAA's the XE014JS is a complete

telephone line interface. It includes the telephone line

transformer, line current holding circuit, hookswitch and

ring indicator. The XE014JS replaces the dozens of

components found in a discrete design with a complete,

tested solution.

Features

* Package: 68-Pin PLCC (only 18 pins used) 0.952

inches by 0.952 inches by 0.170 inches high

* Integrated Telephone Line Transformer

* Integrated Ring Detection with active high and

active low ouput signals

* Operates on a single Power Supply of +5 Volts;

* Solid-State Hookswitch Control with active high

and active low inputs;

* Integrated Connect Detection monitor;

* Integrated Handset Interrupt circuit;

* FCC Part 68 Compliant;

* Extended Temperature Range available;

Figure 1: XE014JS BLOCK DIAGRAM

/Hint

/CD

Handset

Interrupt

Circuit

DC2

DC1

T1

Line Trans-

T2

former

OH(+)

OH(-)

RI(+)

RI(-)

Line Current

Holding Cir-

cuit

Connect

Detect

Monitor

Hookswitch

Ring De-

tector

Tip

Ring

XECOM

XE014JS

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