AT97SC3204-X1A190-1

Overview

The AT97SC3204-X1A190-1 is a security integrated circuit implementing the Trusted Computing Group (TCG) Trusted Platform Module (TPM) Version 1.2 specification. It features an AVR RISC microprocessor and 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 with the host system occurs via a 33MHz Low Pin Count (LPC) bus, supporting SIRQ and CLKRUN for power management. The device includes a FIPS 140-2 compliant True Random Number Generator (RNG), internal EEPROM for RSA key storage, and 1280 bytes of non-volatile user-defined data storage.

Feature Summary

• Full TCG TPM Version 1.2 compatibility
• Hardware crypto engine: 2048-bit RSA in 200ms, 1024-bit RSA in 40ms
• SHA-1 accelerator performance: 20µs per 64-byte block
• FIPS 140-2 compliant True Random Number Generator (RNG)
• Internal EEPROM for RSA keys and 1280-byte NV user data

Applications

• Personal computers requiring TPM integration
• Embedded systems needing hardware-based authentication
• Mobile computers utilizing LPC interface and clock stopping

Procurement Notes

Verify package type availability as the datasheet lists multiple options including 28-lead Thin TSSOP, Wide TSSOP, and 40-lead QFN. Confirm operating temperature range requirements against Commercial (0 to 70°C) or Industrial (-40 to +85°C) specifications. Ensure supply voltage matches the 3.3V requirement. Check for specific firmware or driver support needs from the manufacturer.

Selection Notes

Select based on required package footprint: 28-pin Thin TSSOP (4.4x9.7mm), 28-pin TSSOP (6.1x9.7mm), or 40-pin QFN (6.0x6.0mm). Choose the appropriate temperature grade for the application environment. Verify that the host system supports the 33MHz LPC interface protocol. Consider the need for BIOS drivers and OS device software provided by the manufacturer for integration.

Part Context

This component belongs to the AT97SC3204 series of security ICs manufactured by Microchip Technology (formerly Atmel). It serves as a single-chip turnkey solution for TPM implementation, integrating both firmware and hardware cryptographic accelerators. The series supports standard TCG primitives and PC Client Specific TPM Interface Specification Version 1.2.

Replacement Considerations

Consult the official datasheet addendum for the complete catalog number ordering code to identify equivalent part numbers within the AT97SC3204 family. Verify pinout compatibility if substituting between different package types such as 28A2, 28A3, or 40ML1.