Am79C02/03/031(A)
Dual Subscriber Line Audio Processing Circuit
(DSLAC™) Devices
DISTINCTIVE CHARACTERISTICS
GENERAL DESCRIPTION
I Software programmable:
The Am79C02/03/031(A) Dual Subscriber Line Audio
Processing Circuit (DSLAC device) integrates the key
functions of an analog linecard into a single high-performance, programmable dual codec/filter device. The
DSLAC device is based on the proven design of the
reliable Am7901A Subscriber Line Audio Processing
Circuit (SLAC ™ device). The advanced architecture of
the DSLAC device implements two independent channels and employs digital filters to allow software control
of transmission, thus providing a cost effective solution
for the analog to PCM function of a linecard.
— SLIC impedance
— Transhybrid balance
— Transmit and receive gains
— Equalization
— Digital I/O pins
— Time Slot Assigner
— PCM transmit clock edge options
I Adaptive transhybrid balance filter
(A suffix only)
I A-law or µ-law coding
I Dual PCM ports
— Up to 8.192 MHz each (128 channels per port)
I 2.048 MHz or 4.096 MHz master clock
I Direct transformer drive
The Am79C02/03/031(A) DSLAC device’s advanced
CMOS technology makes this an economical device
that has both the functionality and the low power consumption needed in linecard designs to maximize linecard density at minimum cost. When used with two
Legerity SLICs, the DSLAC device provides software
configurable solutions to the BORSCHT function.
I Built-in test modes
I Low power CMOS
I Mixed mode (analog and digital) impedance
scaling
I Performance characteristics guaranteed over
12 dB gain range
Although the name and logo have changed, the data contained herein
remains the same as the most recent AMD revision of this document.
Publication# 09875 Rev: J Amendment: /0
Issue Date: December 1999
