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-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.

■Software programmable:
— SLIC impedance
— Transhybrid balance
— Transmit and receive gains
— Equalization
— Digital I/O pins
— Time Slot Assigner
— PCM transmit clock edge options
■Adaptive transhybrid balance filter(A suffix only)
■A-law or µ-law coding
■Dual PCM ports
  —Up to 8.192 MHz each (128 channels per port)
■2.048 MHz or 4.096 MHz master clock
■Direct transformer drive
■Built-in test modes
■Low power CMOS
■Mixed mode(analog and digital) impedance scaling
■Performance characteristics guaranteed over 12 dB gain range