AT97SC3204-X1M90

Overview

The AT97SC3204-X1M90 is a security module implementing the Trusted Computing Group (TCG) Trusted Platform Module (TPM) Version 1.2 specification. It integrates an AVR RISC microprocessor, hardware asymmetric crypto engine, and EEPROM storage for RSA keys. The device supports 2048-bit RSA signing in 200ms and communicates via a 33MHz LPC bus. It includes a FIPS 140-2 compliant True Random Number Generator (RNG) and provides 1280 bytes of NV storage for user-defined data. Operating at 3.3V, it is available in commercial and industrial temperature ranges.

Feature Summary

• Full TCG TPM Version 1.2 compatibility with PC Client Specific Interface Specification compliance
• Hardware crypto engine performing 2048-bit RSA sign in 200ms and SHA-1 acceleration at 20µs per 64-byte block
• Integrated AVR 8-bit RISC CPU with internal EEPROM for RSA key management and 1280-byte user data storage
• FIPS 140-2 compliant True Random Number Generator (RNG) for secure key generation

Applications

• Personal computers requiring hardware-based platform authentication
• Embedded systems needing trusted computing capabilities
• Mobile computers utilizing LPC CLKRUN for power savings

Procurement Notes

Verify the specific package type required for the design, as the AT97SC3204 series is offered in 28-lead Thin TSSOP, 28-lead Wide TSSOP, or 40-lead QFN packages. Confirm that the selected variant meets the necessary commercial or industrial operating temperature range for the target application environment.

Selection Notes

Select the appropriate package based on board space constraints: 28A2 (Thin TSSOP), 28A3 (Wide TSSOP), or 40ML1 (QFN). Ensure the system interface supports the 33MHz LPC bus protocol. Verify that the firmware integration aligns with the turnkey solution provided by the manufacturer for the specific OS and BIOS requirements.

Part Context

This component belongs to the AT97SC3204 family of security ICs manufactured by Microchip Technology (formerly Atmel). These devices are designed as single-chip turnkey solutions for OEMs and ODMs to integrate TPM functionality into PCs and embedded systems without external cryptographic components.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Microchip resources for current lifecycle status and potential obsolescence management strategies.