TCM29C23, TCM129C23 VARIABLE-FREQUENCY PCM OR DSP INTERFACE

SCTS029A - AUGUST 1989 -REVISED JULY 1996

features

• Combined ADC, DAC, and Filters
• Extended Variable Frequency Operation
  • Master Clock Up to 4.096 MHz
  • Sample Rates Up to 16 kHz
  • Passband Up to 6 kHz
• Reliable Silicon-Gate CMOS Technology
• Low Power Consumption
  • Operating Mode . . . 80 mW Typical
  • Power-Down Mode . . . 5 mW Typical
• Excellent Power-Supply Rejection Ratio Over Frequency Range of 0 to 50 kHz
• No External Components Needed for Sample, Hold, and Autozero Functions
• Precision Internal Voltage References
• u-law and A-law Coding

description

The TCM29C23 and TCM129C23 are single-chip PCM codecs (pulse-code-modulated encoders and decoders) and PCM lines filters. These devices provide all the functions required to interface a full-duplex (4-wire) voice telephone circuit with a TDM (time-division-multiplexed) system. Primary applications include digital encryption systems, digital voice-band data storage systems, digital signal processing, and mobile telephones.

These devices are designed to perform the transmit encoding (A/D conversion) and receive decoding (D/A conversion) as well as the transmit and receive filtering functions in a pulse-code-modulated system. They are intended to be used at the analog termination of a PCM line or trunk.

The TCM29C23 and TCM129C23 provide the band-pass filtering of the analog signals prior to encoding and after decoding. These combination devices perform the encoding and decoding of voice and call progress tones as well as the signaling supervision information.

The TCM29C23 is characterized for operation from 0°C to 70°C. The TCM129C23 is characterized for operation from -40°C to 85°C.

View more information about generic part numbers:TCM129C23, TCM29C23

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