AM79C30AJC/E3

Overview

The AM79C30AJC/E3 is a Digital Subscriber Controller (DSC) circuit 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.430 standards for S/T reference points, enabling compliant terminal equipment design. Key capabilities include multiframe support for point-to-point and bus configurations, D-channel processing with CRC checking and zero insertion/deletion, and audio processing features such as codec/filter selection and programmable gain.

Feature Summary

• Integrates ISDN physical layer transceiver, protocol processor, and audio functions
• Supports CCITT I.430 S/T-interface standards and power-compliant modes
• Provides hardware-assisted D-channel processing including address detection and FIFO buffers
• Includes dedicated audio processing registers for speakerphone algorithm implementation

Applications

• ISDN terminal equipment design conforming to international standards
• Digital subscriber line controller implementations
• Integrated voice and data communication devices

Procurement Notes

Verify the specific suffix E3 against official AMD documentation to confirm package type and temperature range. Ensure compatibility with required IOM-2 interface signals. Confirm availability of certified protocol software support if implementing LAPD functions. Check for any obsolescence notices from the manufacturer or authorized distributors before finalizing procurement plans.

Selection Notes

Select this component when designing ISDN terminals requiring integrated audio and data processing. Compare with the AM79C32A if only data control without audio processing is needed. Verify that the system architecture supports the required TTL-compatible CMOS logic levels. Ensure the application benefits from the integrated multiframe support and hardware CRC generation capabilities.

Part Context

This part belongs to the AM79C30/AM79C32 family of ISDN controllers. The AM79C30 series combines physical layer and data link layer functions. It is distinct from Ethernet controllers like the AM79C973. The JC/E3 designation typically indicates a specific package variant and commercial/industrial temperature rating within the broader DSC product line.

Replacement Considerations

The AM79C32A is a related device in the same family but lacks the audio processor integration. Direct pin-for-pin replacement may not be feasible if audio functionality is unused or required. Verify electrical compatibility and software driver support for any alternative components.