TP3067N

Overview

The TP3067N is a monolithic PCM CODEC and Filter COMBO utilizing A-law coding, fabricated using National Semiconductor’s microCMOS process. It integrates transmit and receive filtering, an A-law encoder/decoder, and receive power amplifiers for balanced output drive. The device operates on ±5V supplies with typical active power consumption of 70 mW and standby power of 3 mW. It supports serial PCM interfaces compatible with D3/D4 and CCITT standards, featuring TTL or CMOS digital interface compatibility.

Feature Summary

• Integrated A-law encoding and decoding with switched-capacitor filtering
• Built-in receive push-pull power amplifiers for balanced line driving
• Supports short and long frame sync pulse operation modes
• Includes analog loopback switch and internal precision voltage reference

Applications

• D3/D4 telecommunication applications
• CCITT standard compliant systems
• PCM transmission equipment

Procurement Notes

Verify the manufacturer origin as National Semiconductor, now part of Texas Instruments, given the legacy documentation date. Confirm the package type corresponds to the N20A specification for the DIP-20 variant. Ensure the specific revision matches the SNAS570 literature number for accurate electrical characteristics.

Selection Notes

Select the TP3067N specifically for A-law coding requirements, distinguishing it from the TP3064 which uses μ-law. Evaluate the need for integrated power amplifiers if direct transformer driving is required. Consider the synchronous versus asynchronous clocking options based on system timing constraints.

Part Context

This component belongs to the TP3064/TP3067 family of Enhanced Serial Interface CMOS CODEC/Filter COMBO devices. It shares architectural similarities with the TP305X family but adds dedicated receive power amplifiers. The N suffix indicates a Dual-In-Line package configuration.

Replacement Considerations

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