AT97SC3205-G3M4200B

Overview

The AT97SC3205-G3M4200B is a fully integrated Trusted Platform Module (TPM) security module compliant with TCG TPM Version 1.2 and TIS Version 1.3 specifications. It features an Atmel AVR RISC microprocessor, a hardware asymmetric crypto engine, and internal EEPROM storage for RSA keys. The device supports the Serial Peripheral Interface (SPI) protocol at frequencies up to 45MHz. It includes FIPS-140-2 certified components such as a high-quality Random Number Generator (RNG), HMAC, AES, SHA, and RSA engines. The component operates on a 3.3V supply voltage and provides 2066 bytes of non-volatile user-defined data storage.

Feature Summary

• Compliant with TCG TPM Version 1.2 and TIS Version 1.3 specifications
• Integrated hardware asymmetric crypto engine with FIPS-140-2 certification
• Internal EEPROM storage for RSA keys and 2066 bytes of NV user data
• SPI interface supporting clock speeds up to 45MHz

Applications

• Personal computers requiring TPM integration
• Embedded systems needing secure authentication
• Hardware platforms utilizing SPI communication protocols

Procurement Notes

Verify package type compatibility during procurement, as the AT97SC3205 series is available in both 28-lead thin TSSOP and 32-pad QFN packages. Confirm that the specific ordering suffix corresponds to the required physical footprint and lead configuration for the target PCB design. Ensure the selected variant matches the intended operating temperature range requirements.

Selection Notes

Select the appropriate package based on board space constraints; the 28X1 denotes a 28-lead thin TSSOP, while the 32M3 indicates a 32-pad very thin QFN. Verify that the system power supply maintains a stable 3.3V level, as effective decoupling within 5mm of VCC pins is critical for reliable operation. Consider the maximum SPI clock frequency limits when designing the host controller interface.

Part Context

This component belongs to the AT97SC3205 family of Trusted Platform Modules manufactured by Microchip Technology (formerly Atmel). The family offers turnkey solutions for OEMs and ODMs, integrating firmware directly onto the chip. The device serves as a single-chip security solution designed to protect cryptographic keys and platform integrity through dedicated hardware engines.

Replacement Considerations

Direct replacements must match the TCG TPM 1.2 specification and SPI interface. Verify pinout compatibility between the 28-pin TSSOP and 32-pin QFN variants if substituting package types. Ensure the replacement part supports the same 3.3V supply voltage and FIPS-140-2 certification requirements.