821024J8

Overview

The Renesas Electronics Corporation 821024J8 is a single-chip, four-channel PCM CODEC featuring on-chip filters. It provides analog-to-digital and digital-to-analog conversions while supporting both A-law and μ-law companding. The device integrates digital filters for transmit and receive operations in voice telephone circuits interfacing with time-division multiplexed systems. These filters operate via internal digital signal processors derived from the MCLK input. The component operates within a digital supply voltage range of 4.75V to 5.25V and functions across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates four independent channels for simultaneous audio processing
• Includes fixed digital filters for transmit and receive gain and frequency response
• Supports standard telephony companding algorithms for voice optimization

Applications

• Time-division multiplexed (TDM) voice communication systems
• Voice telephone circuit interfaces
• Digital audio processing equipment requiring PCM encoding/decoding

Procurement Notes

Verify the exact suffix designation against official documentation, as the provided model differs slightly from the primary listed part number 821024JG8. Confirm RoHS3 compliance and moisture sensitivity level (MSL 3) requirements for your assembly process. Check for End-of-Life notifications or product change notices that may affect long-term availability or manufacturing sites.

Selection Notes

Select this component when designing systems requiring integrated PCM codec functionality with minimal external filter components. Ensure the system clock architecture can provide the necessary MCLK for the internal DSP operations. Verify that the 32-pin PLCC package fits the board layout constraints and that the 4.75V to 5.25V power supply aligns with the system's digital logic levels.

Part Context

This device belongs to the 821024 family of PCM codecs manufactured by Renesas Electronics Corporation. It is designed specifically for telecommunications applications where high-quality voice transmission over digital networks is required. The integration of filters reduces the bill of materials compared to discrete solutions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult official Renesas documentation for cross-reference information or contact technical support for compatible alternatives.