AT97SC3204-U4A14-20

Overview

The AT97SC3204-U4A14-20 is a Trusted Platform Module (TPM) compliant with TCG TPM version 1.2 and TCG PC Client-specific TPM Interface Specification (TIS) version 1.2. It integrates an AVR RISC microprocessor, hardware asymmetric crypto engine, and internal EEPROM for RSA key storage. The device communicates via a 33MHz Low Pin Count (LPC) bus and includes a FIPS 140-2 compliant Random Number Generator (RNG). It supports SIRQ and CLKRUN for power management in mobile systems.

Feature Summary

• Fully compliant with TCG TPM v1.2 and TCG PC Client-specific TIS v1.2 specifications
• Hardware crypto engine capable of 2048-bit RSA signature in 200ms and SHA-1 acceleration at 20μs per 64-byte block
• Integrated AVR 8-bit RISC CPU with NV storage for 1756 bytes of user-defined data
• FIPS 140-2 compliant internal high-quality Random Number Generator (RNG)

Applications

• Personal computers requiring hardware-based security modules
• Embedded systems needing trusted platform authentication
• Mobile computers utilizing LPC interface and clock stopping features

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current catalog to confirm package type and temperature range. The summary datasheet indicates that complete ordering codes require reference to the full datasheet addendum. Confirm availability through authorized Microchip distributors as supply status may vary.

Selection Notes

Select this component for applications requiring TCG TPM 1.2 compliance on the LPC bus. Ensure the system design accommodates the 3.3V supply voltage and the selected package dimensions (28-lead TSSOP or 40-pad QFN). Verify that the host system supports the required LPC signaling, including LRESET#, LFRAME#, and SERIRQ lines.

Part Context

This part belongs to the AT97SC3204 family of security ICs designed by Atmel (now Microchip Technology). The series provides turnkey solutions for OEMs and ODMs, integrating firmware and drivers for easy integration into PC platforms. The device serves as a cryptographic accelerator and secure storage solution for identity and encryption keys.

Replacement Considerations

Check for updated Microchip part numbers within the same AT97SC3204 family. Ensure any substitute maintains LPC interface compatibility and TCG TPM 1.2 compliance. Verify pinout and package dimension equivalence if switching between TSSOP and QFN variants.