821054PQFG

Overview

The 821054PQFG is a quad PCM CODEC manufactured by Renesas Electronics, also identified under the alias IDT821054PQF. It functions as an audio codec supporting four independent channels for analog-to-digital and digital-to-analog conversion. The device integrates on-chip digital filters designed for voice telephone circuits to interface with time-division multiplexed systems. It supports selectable A-law or μ-law companding standards. The component operates from a single +5.0V power supply using low-power CMOS technology. Master clock frequency selection options include 2.048MHz, 4.096MHz, or 8.192MHz. Internal timing is automatically adjusted based on the master clock and frame sync signals.

Feature Summary

• Integrates four independent PCM codec channels with on-chip digital signal processing filters
• Supports selectable A-law and μ-law companding for standardized voice transmission
• Features hardware-adjustable transmit gains and transhybrid balance impedance via external components
• Operates on a single +5.0V supply with automatic internal timing synchronization

Applications

• Time-division multiplexed telecommunication systems
• Voice telephone circuit interfaces requiring analog-to-digital conversion
• Audio codec applications utilizing standard companding algorithms

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix PQFG matches the required package and lead-free specifications. Check current lifecycle status as availability may be limited due to end-of-life processes. Ensure compatibility with existing system voltage requirements of +5.0V before procurement.

Selection Notes

Select this component when a quad-channel PCM codec with integrated filtering is required for TDM systems. Verify that the system design accommodates the necessary external components for gain and impedance adjustment. Ensure the application environment supports the specified operating temperature range and single +5.0V power supply constraint.

Part Context

This part belongs to the family of quad PCM CODECs produced by Renesas Electronics and its predecessor IDT. It serves as a specialized interface solution for telecommunications equipment. The device replaces older discrete codec implementations by integrating multiple channels and digital filtering into a single chip, simplifying board layout and reducing component count in voice processing applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult official Renesas Electronics resources for current obsolescence management and recommended alternative devices.