TP3070V-XG/NOPB

Overview

The TP3070V-XG/NOPB is a second-generation COMBO II Programmable PCM CODEC and Filter optimized 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 supports a serial PCM interface clocked up to 4.096 MHz and features programmable gains over a 25.4 dB range in both directions. It includes a programmable hybrid balance cancellation filter, six interface latches for SLIC control, and operates within an extended temperature range of -40°C to +85°C.

Feature Summary

• Integrates complete CODEC and FILTER system including transmit/receive channel filters and A/µ-law companding.
• Features programmable transmit and receive gain controls with 0.1 dB step resolution.
• Includes programmable hybrid balance cancellation filter for transformer and active SLIC interfaces.
• Provides six programmable interface latches for direct connection to solid-state SLICs.

Applications

• Digital switching applications on subscriber line cards
• Trunk card implementations in telecommunications systems
• CCITT and LSSGR compliant voice processing circuits

Procurement Notes

Verify the specific suffix 'XG' against official Texas Instruments or National Semiconductor documentation to confirm package type and compliance status. Ensure the component meets RoHS requirements if applicable to the target assembly. Confirm availability as this series may be discontinued or superseded by newer generations. Cross-reference the datasheet revision number to ensure compatibility with existing design files.

Selection Notes

Select the TP3070V-XG/NOPB when designing systems requiring integrated PCM encoding, decoding, and filtering in a single package. Choose this part for applications needing programmable hybrid balancing to accommodate various loop impedances. Consider the extended temperature rating (-40°C to +85°C) for industrial or outdoor telecom environments. Verify that the required number of interface latches (six) matches the system's SLIC control needs.

Part Context

The TP3070 is part of the COMBO II family, which combines CODEC and filter functions. It is related to the TP3071, which offers five interface latches instead of six. The 'V' suffix indicates the extended temperature version, while 'XG' typically denotes a specific plastic leaded chip carrier package variant. This component represents a second-generation improvement over the original COMBO devices.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult Texas Instruments application notes or contact technical support for current replacement recommendations, as older COMBO devices may have been phased out.