TP3076 - National Semiconductor

TP3076 COMBO II Programmable PCM CODEC/Filter for ISDN and Digital Phone Applications

The TP3076 is a second-generation combined PCM CODEC and Filter devices optimized for digital switching applications on subscriber line and trunk cards and digital phone applications. Using advanced switched capacitor techniques, COMBO II combines transmit bandpass and receive lowpass channel filters with a companding PCM encoder and decoder. The devices are.

Features

n Complete CODEC and Filter system including: — Transmit and receive PCM channel filters — µ-law or A-law companding coder and decoder — Receive power amplifier drives 300Ω — 4.096 MHz serial PCM data (max) n Programmable functions: — Transmit gain: 25.4 dB range, 0.1 dB steps — Receive gain: 25.4 dB range, 0.1 dB steps — Time-slot assignment; to 64 slots/frame — 4 interface latches — A or µ-law — Analog loopback — Digital loopback n Direct interface to solid-state SLICs n Standard serial control interface n 80 mW operating power (typ) n 1.5 mW standby power (typ) n Designed for CCITT and LSSG.