AM79C30AJC/E4

Overview

The AM79C30AJC/E4 is a Digital Subscriber Controller (DSC) manufactured by Advanced Micro Devices. It integrates an ISDN S/T-interface transceiver, D-channel LAPD processor, and audio processing capabilities into a single CMOS chip. The device supports CCITT I-series recommendations for S and T reference points. Key electrical parameters include a maximum operating temperature of 70 °C and a supply voltage of 5 V. It utilizes a Plastic Quad Chip Carrier (PQCC) package with 44 pins. The component features TTL-compatible logic levels and supports point-to-point and passive bus configurations for ISDN terminal equipment.

Feature Summary

• Integrates S/T-interface transceiver, D-channel LAPD processor, and audio processor in a single chip
• Supports CCITT I.430 power-compliant terminal equipment operation modes
• Provides D-channel processing including flag generation, CRC checking, and zero insertion/deletion
• Includes programmable gain and equalization filters with A/µ-law codec selection

Applications

• ISDN terminal equipment design conforming to international standards
• S/T-reference point physical layer controller implementation
• Software-based speaker phone algorithm realization

Procurement Notes

Verify the RoHS compliance status indicated by the suffix E4 against current regulatory requirements. Confirm the specific package variant matches the PQCC44 specification. Ensure the source documentation explicitly identifies the manufacturer as Advanced Micro Devices. Validate that the component meets the required industrial temperature range specifications for the intended application environment.

Selection Notes

Select this component when designing ISDN terminals requiring integrated audio processing alongside protocol handling. The device combines functions typically requiring multiple chips, reducing board space. Consider the CMOS technology and TTL compatibility for interface design. Verify support for required multiframe configurations and address detector counts for specific network topologies.

Part Context

This part belongs to the AM79C30A/AM79C32A family of ISDN controllers. The AM79C30A specifically includes audio processing capabilities, distinguishing it from the AM79C32A which lacks the audio processor. Both devices are designed for highly integrated terminal equipment realization.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided data. Designers should consult official AMD documentation for cross-reference information or verify compatibility with newer generations of ISDN controllers if sourcing is restricted.