AT97SC3204-U1A50

Overview

The AT97SC3204-U1A50 is a Trusted Platform Module (TPM) compliant with TCG TPM Version 1.2 and PC Client Specific TPM Interface Specification Version 1.2. It features a hardware asymmetric crypto engine capable of performing a 2048-bit RSA signature in 200ms and a 1024-bit RSA signature in 40ms. The SHA-1 accelerator processes data at 20µs per 64-byte block. Communication occurs via a 33MHz LPC bus, supporting SIRQ and CLKRUN for power management. The device includes an AVR RISC microprocessor, internal EEPROM for RSA keys, and a FIPS 140-2 compliant True Random Number Generator.

Feature Summary

• Compliant with TCG TPM Version 1.2 and PC Client Specific TPM Interface Specification Version 1.2
• Hardware asymmetric crypto engine: 2048-bit RSA sign in 200ms; 1024-bit RSA sign in 40ms
• SHA-1 accelerator performance: 20µs per 64-byte block
• Integrated AVR RISC microprocessor with internal EEPROM storage for RSA keys

Applications

• Personal computers requiring trusted platform module integration
• Embedded systems needing secure hardware and firmware design
• Mobile computers utilizing LPC interface and clock stopping for power savings

Procurement Notes

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

Selection Notes

Select the appropriate package variant based on board space constraints and thermal requirements. The device supports both commercial and industrial temperature ranges. Consider the need for BIOS drivers and OS device driver software provided by the manufacturer for integration. Verify compatibility with the system's LPC interface and ensure proper pull-up resistors are applied to required pins for correct operation.

Part Context

The AT97SC3204 is part of Atmel's (now Microchip Technology) security IC portfolio designed for turnkey TPM solutions. It integrates cryptographic acceleration, random number generation, and non-volatile storage into a single chip. The component is intended for OEM and ODM manufacturers seeking to implement trusted computing standards in PCs and embedded devices without external security components.

Replacement Considerations

Check for updated Microchip Technology part numbers if Atmel branding has been fully transitioned. Verify pinout and electrical parameter compatibility before substituting with other TPM versions from the same family or competing manufacturers.