AT97SC3204-X2A16-20

Overview

The AT97SC3204-X2A16-20 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 Atmel AVR RISC microprocessor, hardware asymmetric crypto engine, and internal EEPROM for RSA keys. The device communicates via a 33MHz Low Pin Count (LPC) bus and includes a FIPS 140-2 compliant Random Number Generator. It supports SIRQ and CLKRUN for power management in mobile computers.

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 1024-bit RSA in 40ms
• SHA-1 accelerator performance of 20μs per 64-byte block
• Internal NV storage space for 1756 bytes of user-defined data

Applications

• Personal computer security integration
• Embedded systems requiring trusted platform functionality
• Mobile computers utilizing LPC interface and clock stopping features

Procurement Notes

Verify the specific package type required for the project, as the AT97SC3204 series is available in 28-lead thin TSSOP, 28-lead wide TSSOP, or 40-pad QFN packages. Confirm temperature range requirements against commercial (0 to 70°C) and industrial (-40 to +85°C) options. Ensure the ordering suffix matches the desired package and operating range specifications from the manufacturer's catalog.

Selection Notes

Select the appropriate package variant based on board space and thermal constraints. The 28X1 package is a 28-lead thin TSSOP, while the 40ML1 is a 40-pad VQFN. Consider the need for GPIO-Express-00 functionality if external GPIO control is required. Verify that the system design accommodates the 3.3V supply voltage and necessary pull-ups for I2C or LPC interfaces as specified in the hardware design guidelines.

Part Context

The AT97SC3204 is part of the Atmel/Microchip TPM family designed for turnkey security solutions. It provides a single-chip implementation of the TPM specification, integrating firmware and hardware acceleration. The device is intended for OEM and ODM manufacturers seeking to implement trusted computing capabilities in PCs and embedded devices without developing custom security logic.

Replacement Considerations

Direct replacements must maintain TCG TPM v1.2 compliance and LPC interface compatibility. Verify pinout compatibility for the selected package (28-pin TSSOP or 40-pin QFN). Check if alternative components support the same cryptographic performance metrics and NV storage capacity. Ensure the replacement component is available in the required temperature range.