Microchip Technology AT97SC3204S-X2AC-10

Overview

AT97SC3204S-X2AC-10 from Atmel is a TCG TPM 1.2-compliant security IC implementing hardware-accelerated 2048-bit RSA signing (200ms), SHA-1 acceleration (20µs/64-byte block), and FIPS 140-2–compliant RNG. It integrates an AVR RISC microprocessor, internal EEPROM for RSA keys, and 1280 bytes of user NV storage. Designed for PC platform root-of-trust in LPC-based motherboards.

For engineers reviewing the AT97SC3204S-X2AC-10 datasheet, AT97SC3204S-X2AC-10 pinout, AT97SC3204S-X2AC-10 application, or AT97SC3204S-X2AC-10 equivalent, key selection criteria include LPC interface timing compliance, industrial temperature support (−40°C to +85°C), 3.3V supply operation, and TCG 1.2 firmware integration readiness.

Technical Context

The AT97SC3204S-X2AC-10 implements the full TCG TPM 1.2 specification stack-including command parsing, cryptographic execution, and physical security logic-within a single die. Its hardware crypto engine handles asymmetric (RSA-2048/1024) and symmetric (SHA-1) operations independently of the AVR core.

LPC interface compliance includes LFRAME#, LAD[0:3], LCLK (33MHz), CLKRUN#, SERIRQ, and SIRQ support for low-power mobile platforms. Internal memory management automatically caches multiple RSA keys without host intervention via TPM_FlushSpecific or TPM_LoadKey2 commands.

Key Specifications

Pinout & Package

AT97SC3204S-X2AC-10 is packaged in a 28-lead Thin TSSOP (4.4 mm × 9.7 mm, 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 applications.

Compared with SLB9665TT2.0 and NPCT750A, the AT97SC3204S-X2AC-10 delivers proven TCG 1.2 interoperability with existing BIOS drivers and manufacturing tooling, while offering lower integration risk in established LPC-based platforms where TPM 2.0 migration is not yet planned.

Availability

AT97SC3204S-X2AC-10 is available at Aetrix Electronics and suitable for server platform root-of-trust, industrial control system integrity, and medical imaging device authentication requiring stable component supply and long-term industrial temperature support.

Supply support for AT97SC3204S-X2AC-10 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 wireless solutions for embedded systems.

The AT97SC3204 product line was designed specifically to deliver certified, single-chip TPM 1.2 functionality for PC and embedded platforms requiring hardware-rooted trust anchors with minimal integration overhead.

FAQ

What is the operating temperature range supported by the AT97SC3204S-X2AC-10?

The AT97SC3204S-X2AC-10 is rated for industrial temperature operation from −40°C to +85°C. This range is explicitly confirmed in the ordering information table and revision history of the official Atmel documentation. The industrial grade qualification makes the AT97SC3204S-X2AC-10 suitable for deployment in harsh environments such as factory automation controllers, network infrastructure equipment, and medical devices where ambient temperatures exceed commercial limits.

Does the AT97SC3204S-X2AC-10 support TCG TPM 2.0?

No, the AT97SC3204S-X2AC-10 implements only TCG TPM Specification Version 1.2 and the PC Client Specific Interface Specification Version 1.2. It does not support TPM 2.0 features such as ECC algorithms, SHA-256, or hierarchical key structures. The AT97SC3204S-X2AC-10 firmware and hardware architecture are fixed to the 1.2 standard, and no field upgrade path to TPM 2.0 exists. For TPM 2.0 compliance, alternative devices like the Infineon SLB9665TT2.0 must be evaluated.

What package type is used for the AT97SC3204S-X2AC-10?

The AT97SC3204S-X2AC-10 uses a 28-lead Thin TSSOP package (drawing code 28A2), measuring 4.4 mm × 9.7 mm with 0.65 mm pitch. This package is RoHS-compliant and lead-free, and its mechanical dimensions match JEDEC MO-153, Variation AE. The package is distinct from the wider 28A3 TSSOP and the 40ML1 QFN variants offered in the same product family.

How does the AT97SC3204S-X2AC-10 handle random number generation?

The AT97SC3204S-X2AC-10 includes a hardware True Random Number Generator (RNG) certified to FIPS 140-2 requirements. It combines analog entropy sources with a FIPS-approved PRNG to produce cryptographically secure random numbers used for RSA key generation, nonce creation, and TCG protocol functions. The RNG output is accessible to the host system via TPM commands and is integrated directly into the crypto engine's key derivation pipeline.

Is the AT97SC3204S-X2AC-10 pin-compatible with other members of the AT97SC3204 family?

No - the AT97SC3204S-X2AC-10 (28A2 Thin TSSOP) is not pin-compatible with the 28A3 TSSOP or 40ML1 QFN variants. Pin counts, pitch, and physical layout differ across packages: 28A2 has 28 pins at 0.65 mm pitch in 4.4×9.7 mm body; 28A3 shares pin count but uses a 6.1×9.7 mm body; 40ML1 uses 40 pins at 0.50 mm pitch in 6.0×6.0 mm body. PCB layout must be specific to the 28A2 footprint for the AT97SC3204S-X2AC-10.