Infineon Technologies SLB9656TT12FW432XUMA2

Overview

SLB9656TT12FW432XUMA2 from Infineon Technologies is a Trusted Platform Module (TPM) 2.0-compliant security IC implementing ISO/IEC 11889 and PC Client TPM Profile v2.0 specifications. It integrates an ARM SecurCore SC300 CPU, 256 KB flash, 24 KB SRAM, and hardware cryptographic accelerators for RSA-2048, ECC-256, SHA-256, and HMAC. Used in server motherboards and industrial PCs for secure boot, attestation, and key protection.

For engineers reviewing the SLB9656TT12FW432XUMA2 datasheet, SLB9656TT12FW432XUMA2 pinout, SLB9656TT12FW432XUMA2 application, or SLB9656TT12FW432XUMA2 equivalent, key considerations include TPM 2.0 compliance level, SPI interface timing, supply voltage tolerance (2.7–3.6 V), and tamper-resistant packaging per ISO/IEC 15408 EAL4+ certification.

Technical Context

This TPM 2.0 device implements a hardened ARM SecurCore SC300 core with memory protection unit (MPU), dedicated crypto engines for asymmetric and symmetric operations, and internal flash with write-protection logic. It supports both SPI (up to 40 MHz) and I²C (up to 1 MHz) host interfaces with configurable interrupt signaling.

Security features include physical tamper detection via mesh sensors and voltage/temperature monitors, secure firmware update with signature verification, and persistent storage isolation between platform hierarchy and endorsement hierarchy keys. All cryptographic operations execute within the secure boundary without exposing private keys to host software.

Key Specifications

Pinout & Package

SLB9656TT12FW432XUMA2 is housed in a 5 mm × 5 mm × 1.0 mm 32-pin TQFP package with exposed thermal pad (RoHS-compliant, lead-free).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TPM 2.0 security applications.

Compared with ST33TPHF2ESAB4, SLB9656TT12FW432XUMA2 provides stronger physical attack resistance and larger SRAM for complex attestation workflows; versus SLB9670VQ20FW432XUMA1, it trades flash capacity and temperature range for lower cost and footprint in mainstream server platforms.

Availability

SLB9656TT12FW432XUMA2 is available at Aetrix Electronics and suitable for server motherboard design, industrial control system integration, medical device certification, and network appliance identity management requiring stable component supply and long-term lifecycle support.

Supply support for SLB9656TT12FW432XUMA2 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 is a German semiconductor manufacturer specializing in power management, sensor, and security solutions for automotive, industrial, and communications markets.

The SLB96xx TPM product line delivers certified, hardware-rooted trust for endpoint devices - designed specifically to meet NIST SP 800-193, ISO/IEC 11889, and Common Criteria EAL4+ requirements in regulated infrastructure.

FAQ

What is the maximum SPI clock frequency supported by SLB9656TT12FW432XUMA2?

The device supports SPI interface operation up to 40 MHz, compliant with TPM 2.0 Main Specification Annex C timing requirements. This allows sub-100 µs command response latency for typical PCR extend and quote operations, enabling tight integration into UEFI firmware boot paths without introducing measurable delay.

Does SLB9656TT12FW432XUMA2 support firmware updates in the field?

Yes - it supports authenticated and encrypted firmware updates via the SPI interface using ECDSA-signed images. The update process enforces signature verification, version rollback prevention, and atomic flash page programming to ensure integrity and recoverability even during power loss.

How is the Endorsement Key (EK) provisioned and protected?

The EK is generated and stored inside the secure boundary during factory programming and is non-exportable. It is bound to the device's unique identifier and used exclusively for attestation and certificate issuance. No software or debug interface can read or modify the EK value post-provisioning.

Can SLB9656TT12FW432XUMA2 operate in I²C mode simultaneously with SPI mode?

No - the interface is selected at power-on via strapping pin configuration (MODE[1:0]). Once initialized, the selected interface (SPI or I²C) remains active until reset. Dual-interface arbitration is not supported; concurrent use would require external multiplexing and violates TPM 2.0 specification compliance.