Description
The T7504 and T5504 devices are single-chip, fourchannel µ-law/A-law PCM codecs with filters. These integrated circuits provide analog-to-digital and digital-to-analog conversion. They provide the transmit and receive filtering necessary to interface a voice telephone circuit to a time-division multiplexed system. These devices are available in 28-pin PLCCs. The T7504 is also available in a 44-pin MQFP.

Features
■ 5 V only
■ Low-power, latch-up-free CMOS technology
   — 37 mW/channel typical operating power dissipation
   — 1 mW/channel typical powerdown dissipation
■ Automatic master clock frequency selection
   — 2.048 MHz or 4.096 MHz
■ On-chip sample and hold, autozero, and precision voltage reference
■ Differential architecture for high noise immunity and power supply rejection
■ Flexible time-slotted PCM interface — 2.048 MHz or 4.096 MHz data rate
■ Meets or exceeds ITU-T G.711—G.714 requirements and VF characteristics of D3/D4 (as per Lucent Technologies PUB43801)
■ Operating temperature range: –40 °C to +85 °C
■ µ-law/A-law companding selectable