LM4545VH

Codecs Overview

The LM4545VH is an AC '97 audio codec integrated circuit manufactured by National Semiconductor. It features a 48-pin LQFP package and supports 18-bit resolution with sampling rates up to 48 kHz. The device integrates two analog-to-digital converters (ADCs) and two digital-to-analog converters (DACs). It includes a stereo headphone amplifier and supports National's 3D Sound technology for enhanced audio processing capabilities within consumer electronics applications.

Codecs Feature Summary

• Integrates dual ADCs and dual DACs for comprehensive audio signal conversion
• Includes a built-in stereo headphone amplifier for direct output driving
• Supports National 3D Sound technology for spatial audio enhancement

Codecs Applications

• Consumer electronics audio systems
• AC '97 interface based sound cards
• Multimedia peripheral devices

Codecs Procurement Notes

Verify component authenticity through authorized distributors or official manufacturer channels. Confirm package type matches the 48-LQFP specification. Check datasheet revisions for any functional updates. Ensure compatibility with existing system designs before procurement.

Codecs Selection Notes

Select this component for applications requiring AC '97 compliance and integrated headphone amplification. Consider the 18-bit resolution and 48 kHz sampling rate limits. Evaluate thermal requirements for the LQFP package in enclosed designs.

Codecs Part Context

This part belongs to the National Semiconductor AC '97 codec family. It is designed for cost-effective audio solutions in consumer devices. The LM4545VH provides a complete audio solution with minimal external components compared to discrete alternatives.

Codecs Replacement Considerations

The LM4548VH is a documented substitute offering sample rate conversion capabilities. Verify pinout compatibility and software configuration differences when substituting.