BU94502AKS2-E2

Overview

The BU94502AKS2-E2 is a silicon monolithic integrated circuit designed as a USB audio decoder LSI. It integrates a USB host interface, SD card I/F, audio DAC, system controller, and an internal regulator for the core power supply. The device supports playback of WAV, AAC, WMA, and MP3 formats from connected memory devices. It operates with a supply voltage range of 3.0 V to 3.6 V and functions within an operating temperature range of -40°C to +85°C. The component utilizes a SQFP-T52M package measuring 12.00 mm x 12.00 mm x 1.50 mm.

Feature Summary

• Integrates USB 2.0 Full Speed host interface supporting USB mass storage class and iPod automatic enumeration.
• Includes built-in decoders for MP3 (MPEG1/2/2.5 Layer 1-3), WMA (WMA9 standard), AAC (MPEG4 AAC-LC), and WAV formats.
• Features protocol conversion capabilities between I2C and USB HID interfaces for communication with master microcomputers.
• Contains a sample rate converter that converts supported sample rates to 44.1 kHz using polyphase calculation.

Applications

• Audio products requiring USB host connectivity
• Portable media players utilizing SD card storage
• Digital audio systems integrating iPod compatibility

Procurement Notes

Verify the current lifecycle status before integration, as this specific model may be classified as obsolete or not recommended for new designs. Confirm that any required licensing agreements, such as Apple's Made for iPod/iPhone/iPad License, are secured prior to deployment. Ensure the SQFP-T52M package dimensions align with the target PCB layout constraints.

Selection Notes

Select this model when both USB host functionality and SD card interface support are required within a single component. It is suitable for applications needing direct decoding of compressed audio formats without external processing. Verify that the system design accommodates the specific pinout and power requirements of the SQFP-T52M package compared to alternative packages in the series.

Part Context

This component belongs to the BU9450xAxxx series of USB Audio Decoder LSIs manufactured by ROHM Semiconductor. The series includes variants with different packages, such as the VQFN040V6060 and SQFP-T52M. The AKS2 suffix specifically denotes the SQFP-T52M package configuration, distinguishing it from the AMUV variant which uses a VQFN package.

Replacement Considerations

BU94502AMUV-E2 offers identical functional specifications but utilizes a VQFN040V6060 package instead of the SQFP-T52M form factor.