TP3057WM/NOPB

Codecs Overview

The TP3057WM/NOPB is a monolithic PCM CODEC/filter utilizing A-law encoding and decoding. It operates with ±5V power supplies and features a serial PCM interface compatible with D3/D4 and CCITT standards. The device integrates transmit high-pass and low-pass filtering, receive low-pass filtering with sinc-x/x correction, active RC noise filters, an internal precision voltage reference, and auto-zero circuitry. It supports master clocks of 1.536 MHz, 1.544 MHz, or 2.048 MHz and bit clocks from 64 kHz to 2.048 MHz. Typical operating power is 50 mW, reducing to 3 mW in standby mode.

Codecs Feature Summary

• Complete CODEC and filtering system (COMBO) including transmit and receive filtering stages
• A-law compatible COder and DECoder with internal precision voltage reference
• Serial I/O interface with TTL or CMOS compatibility
• Internal auto-zero circuitry for offset cancellation

Codecs Applications

• D3/D4 telephony applications
• CCITT standard communication systems
• Line interface card circuit designs

Codecs Procurement Notes

Verify the component status as discontinued through official Texas Instruments channels. Confirm that the NOPB suffix indicates lead-free and RoHS compliance. Ensure the WM package variant matches the required surface-mount footprint specifications for the target PCB layout.

Codecs Selection Notes

Select this part for applications requiring A-law PCM encoding rather than mu-law. Verify that the system requires ±5V analog supplies. Ensure the design accommodates the specific timing requirements for frame sync pulses and bit clocks within the specified frequency ranges.

Codecs Part Context

This component belongs to the TP3054/TP3057 Enhanced Serial Interface CODEC/Filter COMBO Family. The TP3057 specifically implements A-law coding, whereas the TP3054 utilizes mu-law. Both share identical hardware architectures and pinouts but differ in their digital encoding algorithms.

Codecs Replacement Considerations

Public confirmed substitute part numbers include TP3057AN and TP3057BDW. Verify package compatibility and temperature range specifications when substituting.