TP3067AN

Overview

The TP3067AN is a monolithic serial interface combined PCM codec and filter manufactured by Texas Instruments. It integrates transmit high-pass and low-pass filtering, receive low-pass filtering with (sin x)/x correction, active RC noise filters, and an A-Law compatible coder/decoder. The device operates on dual ±5-V supplies with a typical active power consumption of 70 mW and features a power-down standby mode consuming 3 mW. It supports TTL- or CMOS-compatible digital interfaces and includes internal autozero circuitry and a precision voltage reference.

Feature Summary

• Integrates complete PCM codec functions including A-Law encoding and decoding alongside transmit and receive filtering stages
• Features patented circuitry designed to achieve low transmit channel idle noise performance
• Includes internal autozero logic and precision voltage reference for stable analog signal processing
• Supports both synchronous and asynchronous master clock configurations via selectable bit clock inputs

Applications

• Line interface for T1 carrier systems
• PABX and central office telephone switching systems
• Subscriber line concentrators
• Digital voice-band data-storage systems

Procurement Notes

Verify the specific package marking against the datasheet pinout diagram to confirm the DW or N package variant. Ensure that the supply rails are strictly maintained within the recommended operating conditions of VCC = 5 V ± 5% and VBB = -5 V ± 5%. Confirm that the application environment adheres to the specified commercial temperature range of 0°C to 70°C for this specific part number.

Selection Notes

Select the TP3067AN when A-Law compression is required for the codec standard. This component is suitable for applications requiring integrated analog filtering without external discrete components. Verify compatibility with the system's master clock frequencies, which must be 1.536 MHz, 1.544 MHz, or 2.048 MHz depending on the selected operational mode.

Part Context

This component belongs to the TP306xA series of monolithic PCM codecs. It serves as an improved version of earlier National Semiconductor designs, specifically the TP3067. The device provides a complete solution for interfacing full-duplex voice telephone circuits with time-division-multiplexed digital systems, combining analog-to-digital and digital-to-analog conversion with necessary line filtering.

Replacement Considerations

The TP3067A is pin-for-pin compatible with the National Semiconductor TP3067A. Designers may consider the TP13067A for extended industrial temperature ranges (-40°C to 85°C). Verify that any substitute maintains the same A-Law coding standard and serial interface timing requirements.