TP3070V-G/63SN

Overview

The TP3070V-G/63SN 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 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
• CCITT and LSSGR compliant telephony applications
• Interfaces requiring programmable hybrid balancing

Procurement Notes

Verify the specific suffix G/63SN against the manufacturer's current lifecycle status, as this indicates a lead-free (Green) package variant. Confirm that the extended temperature rating aligns with environmental requirements. Ensure the plastic LCC-28 package dimensions match the target PCB footprint. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

Selection Notes

Select this component when designing subscriber line circuits requiring integrated filtering and companding. The dual-port capability allows space switching implementation. Verify MCLK frequency options (512 kHz to 4.096 MHz) match the system clock. Ensure the 28-pin PLCC package fits the assembly constraints. Consider the power-down mode for standby efficiency in battery-sensitive environments.

Part Context

This part belongs to the National Semiconductor (now Texas Instruments) COMBO II family, which combines CODEC and filter functions. It is functionally related to the TP3071, which lacks the second port and has fewer latches. The TP3070 series simplifies design by integrating analog filtering and PCM encoding into a single CMOS package, reducing external component count compared to first-generation discrete solutions.

Replacement Considerations

The TP3070V-XG/NOPB is a confirmed equivalent within the same product family. Both share identical functional specifications and pinouts. Verify that the ordering suffix corresponds to the required temperature grade and packaging compliance before substitution.