TP3057BDW

Codecs Overview

The TP3057BDW is a monolithic serial interface combined PCM codec and filter manufactured by Texas Instruments. It integrates an A-law compatible coder/decoder, transmit high-pass and low-pass filtering, receive low-pass filtering with (sin x)/x correction, active RC noise filters, and an internal precision voltage reference. The device operates on dual ±5-V supplies and features a TTL- or CMOS-compatible serial I/O interface. Packaged in a 16-SOIC format, it supports master clock frequencies of 1.536 MHz, 1.544 MHz, or 2.048 MHz and bit clocks ranging from 64 kHz to 2.048 MHz.

Codecs Feature Summary

• Integrates complete A-law encoding and decoding functions alongside transmit and receive band-pass filtering on a single chip.
• Features an internal autozero circuitry and precision voltage reference to maintain signal integrity without external components.
• Supports both synchronous and asynchronous serial timing configurations with flexible frame-sync pulse options.

Codecs Applications

• Line interface for digital transmission and switching of T1 carrier systems
• Subscriber line concentrators in PABX and central office telephone systems
• Digital-encryption systems requiring voice-band data processing

Codecs Procurement Notes

Verify the specific revision status and lead times directly with authorized distributors, as this component may be subject to end-of-life restrictions. Confirm that the 16-SOIC package dimensions match the target PCB footprint requirements before finalizing procurement orders.

Codecs Selection Notes

Select the TP3057BDW when A-law compression is required for PCM applications. Ensure the system design accommodates dual ±5-V power rails and provides separate transmit and receive master clocks if asynchronous operation is desired over the synchronous mode.

Codecs Part Context

This component belongs to the TP305xB family of monolithic PCM codecs. It serves as a direct replacement for the National Semiconductor TP3057 and is pin-for-pin compatible with the TP3057B variant. The 'DW' suffix indicates the 16-SOIC surface-mount package configuration.

Codecs Replacement Considerations

The TP3057ADW is a compatible alternative within the same product family offering identical functionality in the same package.

Codecs FAQ

What is the difference between the TP3054B and TP3057B regarding coding standards?

The TP3054B implements μ-law coding, whereas the TP3057B implements A-law coding standards for audio compression.

How does the MCLKR/PDN pin function during power-up?

Connecting MCLKR/PDN continuously low powers up the device, while connecting it continuously high places the device in power-down standby mode.