Microchip Technology AT97SC3204-U1A190-1

Overview

AT97SC3204-U1A190-1 from Atmel is a TCG TPM 1.2-compliant security IC implementing hardware-based RSA-2048 signing in 200ms, SHA-1 acceleration at 20µs/64-byte block, and FIPS 140-2-compliant true RNG. It integrates an AVR RISC CPU, internal EEPROM for RSA keys, and 1280 bytes of user NV storage. Designed for PC platform root-of-trust, it interfaces via 33MHz LPC bus with SIRQ and CLKRUN support.

For engineers reviewing the AT97SC3204-U1A190-1 datasheet, AT97SC3204-U1A190-1 pinout, AT97SC3204-U1A190-1 application, or AT97SC3204-U1A190-1 equivalent, key selection considerations include LPC interface timing compliance, industrial temperature range (-40°C to +85°C), TCG 1.2 firmware integration, and 28-pin Thin TSSOP package mechanical compatibility.

Technical Context

The AT97SC3204-U1A190-1 implements the full TCG PC Client Specific TPM Interface Specification v1.2, including command/response framing, locality management, and physical presence assertion logic. Its cryptographic engine executes RSA-2048 signature generation and SHA-1 hashing in dedicated hardware, offloading host CPU and ensuring deterministic latency.

It uses dynamic internal memory management for RSA key caching without host intervention beyond standard TCG commands (TPM_FlushSpecific, TPM_LoadKey2). The LPC interface supports LAD[0:3] multiplexed command/address/data, LFRAME#, LCLK, and power-aware signals (LPCPD#, CLKRUN#) for mobile platform integration.

Key Specifications

Pinout & Package

AT97SC3204-U1A190-1 is packaged in a 28-lead Thin TSSOP (4.4 mm × 9.7 mm body, 0.65 mm pitch), RoHS-compliant and lead-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TPM security module applications.

Compared with Infineon SLB9665TT2.0 and Nuvoton NPCT650KBAX, the AT97SC3204-U1A190-1 offers proven TCG 1.2 LPC integration in 28-pin Thin TSSOP, optimized for legacy BIOS platforms requiring minimal layout change and deterministic 200ms RSA signing.

Availability

AT97SC3204-U1A190-1 is available at Aetrix Electronics and suitable for desktop motherboard design, industrial PLC development, medical imaging equipment, and network appliance manufacturing requiring stable component supply across long product lifecycles.

Supply support for AT97SC3204-U1A190-1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Atmel Corporation, now part of Microchip Technology, is a semiconductor manufacturer specializing in microcontrollers, security ICs, and touch solutions for embedded systems.

The AT97SC3204-U1A190-1 belongs to Atmel's PC Security product line, engineered specifically to deliver certified, turnkey TPM 1.2 functionality for x86 platform manufacturers needing drop-in root-of-trust modules with minimal firmware integration effort.

FAQ

What is the operating temperature range supported by the AT97SC3204-U1A190-1?

The AT97SC3204-U1A190-1 is rated for industrial temperature operation from -40°C to +85°C. This range is validated per the ordering information in the official Atmel documentation and ensures reliable performance in embedded systems deployed in uncontrolled thermal environments. The AT97SC3204-U1A190-1 maintains full TCG 1.2 functionality-including RSA-2048 signing latency and LPC interface timing-across this entire range.

Does the AT97SC3204-U1A190-1 support TPM 2.0 functionality?

No, the AT97SC3204-U1A190-1 implements only TCG TPM Specification Version 1.2 and is not compliant with TPM 2.0. It does not support ECC algorithms, SHA-256, or the hierarchical key structure defined in TPM 2.0. For TPM 2.0 requirements, designers must select a different part such as the Infineon SLB9665TT2.0. The AT97SC3204-U1A190-1 firmware and hardware architecture are fixed to TPM 1.2.

What package type is used for the AT97SC3204-U1A190-1?

The AT97SC3204-U1A190-1 uses a 28-lead Thin TSSOP package (4.4 mm × 9.7 mm body, 0.65 mm pitch), designated as 28A2 in Atmel's package drawings. This RoHS-compliant, lead-free package matches JEDEC MO-153 Variation AE and is mechanically and electrically compatible with standard LPC socket footprints used in desktop and industrial motherboard designs. The AT97SC3204-U1A190-1 does not use QFN or standard TSSOP variants.

How does the AT97SC3204-U1A190-1 handle RSA key storage and management?

The AT97SC3204-U1A190-1 uses internal EEPROM to store RSA keys securely, with dynamic memory management that automatically caches keys without host driver intervention beyond standard TCG commands (TPM_FlushSpecific, TPM_LoadKey2). The AT97SC3204-U1A190-1 enforces access control and physical tamper resistance per TCG 1.2 requirements, and all key operations occur inside the secure boundary of the IC.

Is the AT97SC3204-U1A190-1 compatible with standard LPC bus timing specifications?

Yes, the AT97SC3204-U1A190-1 fully complies with the TCG PC Client Specific TPM Interface Specification v1.2 for LPC timing, including setup/hold requirements on LAD[0:3], LFRAME#, and LCLK. It operates at 33MHz with support for SIRQ and CLKRUN# signals, enabling seamless integration into existing x86 platform designs. The AT97SC3204-U1A190-1 has been validated in reference motherboards meeting Intel LPC timing budgets.