Am79C02/03/031(A)
Dual Subscriber Line Audio Processing Circuit (DSLAC™) Devices
DISTINCTIVE CHARACTERISTICS
a73 Software programmable:
— SLIC impedance
— Transhybrid balance
— Transmit and receive gains
— Equalization
— Digital I/O pins
— Time Slot Assigner
— PCM transmit clock edge options
a73 Adaptive transhybrid balance filter
(A suffix only)
a73 A-law or µ-law coding
a73 Dual PCM ports
— Up to 8.192 MHz each (128 channels per port)
a73 2.048 MHz or 4.096 MHz master clock
a73 Direct transformer drive
a73 Built-in test modes
a73 Low power CMOS
a73 Mixed mode (analog and digital) impedance
scaling
a73 Performance characteristics guaranteed over
12 dB gain range
GENERAL DESCRIPTION
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-per-
formance, 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 chan-
nels 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.
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 con-
sumption needed in linecard designs to maximize line-
card density at minimum cost. When used with two AMD
SLICs, the DSLAC device provides software config-
urable solutions to the BORSCHT function.
Publication# 09875 Rev: J Amendment: /0
Issue Date: December 1999