AM79C30AJC/DTR

Overview

The AM79C30AJC/DTR is a Digital Subscriber Controller (DSC) manufactured by Advanced Micro Devices. It integrates an ISDN S/T-interface transceiver, D-channel LAPD processor, audio processor, and IOM-2 interface into a single CMOS chip. The device supports CCITT I-series recommendations for S and T reference points, enabling compliant terminal equipment design. Key features include level 1 physical layer control for point-to-point and bus configurations, multiframe support, and specialized D-channel processing such as flag generation, CRC checking, and zero insertion/deletion. The audio section provides codec/filter capabilities with A/μ selection and programmable gain.

Feature Summary

• Integrates ISDN S/T-interface transceiver, D-channel LAPD processor, audio processor, and IOM-2 interface in a single chip
• Supports CCITT I.430 power-compliant terminal equipment with special operating modes
• Provides D-channel processing including flag generation/detection, CRC generation/checking, and zero insertion/deletion
• Includes audio processing capability with dual inputs, earpiece/loudspeaker drivers, and programmable gain filters

Applications

• ISDN terminal equipment realization conforming to international standards
• S/T-reference point implementation for digital subscriber lines
• Software-based speaker phone algorithm implementation

Procurement Notes

Verify the manufacturer designation, as AMD was acquired by GlobalFoundries. Confirm the specific suffix 'JC/DTR' corresponds to the intended package and temperature grade against official datasheets. Ensure compatibility with required CCITT standards for the target application.

Selection Notes

Select this component for applications requiring integrated ISDN D-channel processing and audio handling. Compare with the AM79C32A if data-only functionality without audio processing is sufficient. Verify CMOS technology compatibility and TTL signal levels for the system interface.

Part Context

This part belongs to the AM79C30A/AM79C32A family of ISDN controllers. The AM79C30A specifically includes audio processing features, distinguishing it from the AM79C32A which lacks the audio processor. Both share the same core ISDN protocol and interface capabilities.

Replacement Considerations

The AM79C32A is a related variant within the same family but lacks the audio processor. Direct substitution requires verifying if the audio functions are utilized in the specific circuit design.