TP3070V-G/NOPB

Overview

The TP3070V-G/NOPB is a COMBO II Programmable PCM CODEC/Filter designed for digital switching applications on subscriber line and trunk cards. It integrates transmit bandpass and receive lowpass channel filters with A-law and µ-law selectable companding encoders and decoders. The device features a serial PCM interface clocked up to 4.096 MHz, programmable gains over a 25.4 dB range in 0.1 dB steps, and a hybrid balance cancellation filter exceeding 30 dB. It includes six programmable interface latches for SLIC control, operates on ±5 V supplies, and supports an extended temperature range of −40°C to +85°C.

Feature Summary

• Integrates switched-capacitor channel filters with A-law or µ-law companding encoding and decoding.
• Features a programmable hybrid balance cancellation filter for transformer and active SLIC interfaces.
• Includes six individually configurable interface latches for direct solid-state SLIC control.
• Supports time-slot assignment for up to 64 slots per frame via a standard serial control port.

Applications

• Subscriber line and trunk cards in digital switching systems
• Interfaces requiring CCITT and LSSGR compliance
• Telecommunications equipment utilizing solid-state SLICs

Procurement Notes

Verify the specific suffix 'G' against the manufacturer's official documentation to confirm lead-free status and RoHS compliance. Confirm that the package marking matches the PLCC-28 physical outline. Ensure the component meets the required extended temperature specifications for your application environment.

Selection Notes

Select this component when a combined CODEC and filter solution is required for subscriber lines. Ensure the system design accommodates the ±5 V power supply requirements. Verify that the available serial control interface aligns with the host processor's capabilities for programming gain and time-slot assignments.

Part Context

This part belongs to the National Semiconductor (now Texas Instruments) COMBO II family. It is functionally similar to the TP3071 but provides additional ports and interface latches. The 'V' suffix indicates the extended temperature grade, while 'NOPB' typically denotes a lead-free and RoHS-compliant variant.

Replacement Considerations

The TP3071 offers identical CODEC and filter functionality but lacks the second port and has fewer interface latches. Other COMBO series devices like the TP3050/60 may require significant timing adjustments due to different frame sync relationships.