TP3070AV-G

Overview

The TP3070AV-G 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 companding PCM encoder and decoder functions. The device supports serial PCM interfaces clocked up to 4.096 MHz and includes programmable latches for SLIC control. Operating power consumption is typically 80 mW, with standby power at 1.5 mW. It features programmable gains over a 25.4 dB range in both directions and includes a hybrid balancing filter capable of achieving cancellation exceeding 30 dB.

Feature Summary

• Integrates switched capacitor channel filters with A-law or µ-law companding PCM encoding and decoding.
• Includes a programmable hybrid balance cancellation filter to adjust for various loop impedance conditions.
• Features six programmable interface latches configurable as inputs or outputs for direct SLIC control.
• Supports time-slot assignment for up to 64 slots per frame and allows dual port assignment.

Applications

• Subscriber line and trunk cards in digital switching systems
• Interfaces requiring direct connection to solid-state SLICs
• Applications utilizing transformer-based SLICs with single winding secondary

Procurement Notes

Verify the specific suffix 'AV' against official manufacturer documentation to confirm temperature rating and package configuration. Ensure compatibility with required supply voltages (+5V and -5V) and check for end-of-life status given the component's publication date. Confirm that the TTL and CMOS compatible digital interfaces match the system logic levels.

Selection Notes

Select this component when designing systems requiring integrated CODEC and filtering capabilities for subscriber lines. Consider the extended temperature range if operating environments exceed standard commercial limits. Evaluate the need for dual ports versus single port configurations, as the TP3070 supports two while the TP3071 supports one. Verify master clock frequency requirements against available system clocks.

Part Context

The TP3070 belongs to the National Semiconductor (now Texas Instruments) COMBO II family of second-generation combined PCM CODECs and filters. It is optimized for high-performance voice processing in telecommunications infrastructure. The device simplifies design by combining analog filtering, coding, and interface control into a single integrated circuit, reducing component count compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.