AS3524

Overview

The AS3524 is a highly flexible, fully integrated digital audio processor system-on-chip (SoC) designed for portable media applications. It features an ARM922TDMI RISC CPU capable of up to 200 MIPS at 250 MHz, supported by 2.5 Mbit on-chip RAM and 1 Mbit ROM. The device integrates high-speed interfaces including USB 2.0 HS-OTG, ATA IDE, SDRAM, NAND flash, and MMC/SD card controllers. Operating with supply voltages ranging from 1.08V to 1.25V for the core and 3.0V to 3.6V for peripherals, it delivers low power consumption of 0.3 mW/MHz for the core. Packaged in a 180-CTBGA format, it supports I2C, I2S, and SPI interfaces for comprehensive audio signal processing.

Feature Summary

• Embedded ARM922TDMI RISC controller with 2.5 Mbit RAM and 1 Mbit ROM
• Integrated USB 2.0 High-Speed On-The-Go interface supporting up to 480 Mbit/s
• Dedicated controllers for ATA IDE, NAND Flash, and MMC/SD cards
• Low power consumption of 0.3 mW/MHz for the ARM922T core

Applications

• Portable Digital Audio Players and Recorders
• Portable Digital Media Players
• Personal Digital Assistants (PDA)
• Smartphones

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Ensure that the design accounts for the required startup sequence where VDD_CORE must not be applied before peripheral supplies. Confirm compatibility with the 180-CTBGA footprint and soldering conditions specified in the datasheet.

Selection Notes

Select this component for designs requiring a powerful embedded processor alongside extensive multimedia connectivity. The inclusion of hardware accelerators for USB, IDE, and memory interfaces reduces CPU load. Ensure the power supply design can handle the peak operating currents, particularly when running at maximum clock speeds or utilizing high-speed data transfers simultaneously.

Part Context

The AS3524 belongs to the AS352x family of advanced audio processors developed by austriamicrosystems. It utilizes a 0.13µm process technology to achieve high performance within a compact form factor. This SoC was engineered to replace discrete solutions by integrating the main processor, memory, and various peripheral controllers onto a single chip.

Replacement Considerations

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