AT85C51SND3B1-RTTUL

Overview

The AT85C51SND3B1-RTTUL is a single-chip digital audio decoder and encoder with a USB 2.0 interface, manufactured by Microchip Technology. It integrates an enhanced 8-bit C51 core operating at up to 24 MHz, featuring 64 Kbytes of internal RAM. The device supports MP3, WMA, WAV PCM, ADPCM, and JPEG decoding. It includes a stereo audio codec with three 16-bit DACs, a headphone amplifier, and a microphone pre-amplifier. Connectivity options include a USB Rev 2.0 controller supporting High Speed (480 Mbps) and Full Speed (12 Mbps), along with interfaces for NAND Flash, SD/MMC cards, LCD, and keyboards. Operating temperatures range from -40°C to +85°C.

Feature Summary

• Integrated MP3 and WMA decoders with proprietary DSP capabilities
• USB 2.0 controller supporting High Speed, Full Speed, and On-The-Go modes
• Built-in file system management for FAT12/16/32 and multiple storage media
• Stereo audio codec with capless headphone output and graphical equalizer

Applications

• Digital music players and portable media devices
• Mobile phones and handheld navigation units
• Industrial applications requiring MMC/SD Flash card support
• Car audio systems and shopping center music installations

Procurement Notes

Verify the specific ordering suffix RTTUL against the manufacturer's current datasheet to confirm package type, tape-and-reel specifications, and regional compliance certifications. Ensure the component matches the AT85C51SND3B1 derivative variant regarding power supply requirements and pinout compatibility before integration into the design.

Selection Notes

Select this component for applications requiring a complete plug-and-play audio solution with USB connectivity. It is suitable for designs needing low development time due to embedded firmware support for common audio formats and file systems. Consider the power supply architecture; this variant supports direct USB VBUS or external 3V supplies, differing from variants with integrated DC-DC converters for battery-only operation.

Part Context

This part belongs to the AT85C51SND3B family of single-chip digital audio processors. The family differentiates primarily by power management features and available analog outputs. The AT85C51SND3B1 variant specifically lacks the internal DC-DC step-up converter found in the B2 derivative, requiring an external 3V supply or direct USB power rather than single-cell battery operation without additional circuitry.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.