Infineon Technologies SLB9635TT12FW316XUMA1

Overview

SLB9635TT12FW316XUMA1 from Infineon is a TCG 1.2-compliant Trusted Platform Module (TPM) security IC implementing hardware-rooted trust for PC platforms. It integrates a 16-bit SLE66CXxxPE security controller, 2048-bit RSA acceleration, SHA-1 hardware hash engine, true random number generator (TRNG), and EEPROM for key storage - deployed in notebook/desktop motherboards via LPC interface for Windows Vista–compatible secure boot and attestation.

For engineers reviewing the SLB9635TT12FW316XUMA1 datasheet, SLB9635TT12FW316XUMA1 pinout, SLB9635TT12FW316XUMA1 application, or SLB9635TT12FW316XUMA1 equivalent, this module delivers certified EAL4+ tamper-resistant cryptographic services including Endorsement Key personalization, TPM software stack (TSS) compliance, and WHQL-certified Windows Kernel Mode Driver support.

Technical Context

The SLB9635TT12FW316XUMA1 implements the TCG 1.2 specification using a hardened 16-bit microcontroller on 0.22 µm CMOS, with dedicated crypto accelerators for RSA-2048 signing/verification and SHA-1 hashing. Its embedded secure OS enforces strict access control over non-volatile key storage and supports dynamic clock shutdown (CLKRUN) and power-down signaling for LPC bus integration.

Security architecture includes over/under-voltage detection, low/high-frequency sensors, reset filtering, memory encryption (MED), and tamper-evident tick counter. It supports Intel TXT and AMD SVM extensions, provides Microsoft-recommended GPIOs, and ships pre-personalized with factory-generated Endorsement Key and certificate.

Key Specifications

Pinout & Package

SLB9635TT12FW316XUMA1 is housed in a green, RoHS-compliant TSSOP-28 package (5.0 × 12.0 × 1.2 mm), optimized for surface-mount assembly on high-density motherboard layouts near the southbridge.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TPM 1.2 hardware security applications.

Compared with ST33HTPH2E32A and ATTPM12-28, SLB9635TT12FW316XUMA1 uniquely combines WHQL-certified Windows driver support, hardware-accelerated RSA-2048/SHA-1, and factory EK personalization - making it the only option qualified for OEM deployment in Windows Vista–era commercial notebooks requiring out-of-box BitLocker and remote attestation.

Availability

SLB9635TT12FW316XUMA1 is available at Aetrix Electronics and suitable for notebook manufacturing, desktop motherboard design, and enterprise endpoint security solutions requiring stable component supply and long-term lifecycle assurance.

Supply support for SLB9635TT12FW316XUMA1 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in security, power management, and automotive ICs, with headquarters in Munich and global R&D centers.

The SLB9635 series belongs to Infineon's Trusted Computing product line, designed specifically to deliver certified, standards-compliant hardware roots of trust for PC platforms - enabling secure boot, remote attestation, and cryptographic key protection in consumer and enterprise computing.

FAQ

Does SLB9635TT12FW316XUMA1 support TPM 2.0?

No. This device implements only TCG 1.2 specification. It lacks the elliptic curve cryptography (ECC), algorithm agility, and command structure required for TPM 2.0. Migration to TPM 2.0 requires hardware replacement with Infineon's SLB9670 or equivalent.

Is the Endorsement Key (EK) pre-provisioned and certifiable?

Yes. Each unit ships with a unique, factory-generated RSA-2048 Endorsement Key and an X.509 certificate signed by Infineon's Certificate Authority. The EK certificate chain is verifiable via TCG-defined protocols and accepted by Microsoft's attestation services.

What is the maximum sustained data rate over the LPC interface?

The LPC interface operates at 33 MHz with time-multiplexed LAD[3:0], achieving up to 132 MB/s theoretical bandwidth. Real-world sustained throughput for firmware updates is ~28 MB/s due to protocol overhead and transaction arbitration delays.

Can SLB9635TT12FW316XUMA1 be reprogrammed or updated in-system?

Yes. Firmware updates are supported via LPC using TCG-defined update mechanisms. Updates require authenticated digital signatures and pass hardware-based integrity checks before EEPROM write. Field updates must use Infineon's authorized toolchain and signed firmware images.