SLB9645TT12FW13333XUMA2

Overview

The Infineon OPTIGA™ TPM SLB9645TT1.2 is a Trusted Platform Module compliant with TPM Main Specification Version 1.2, Rev. 116. It features an I²C interface supporting standard mode (up to 100 kHz) and fast mode (up to 400 kHz), along with a dedicated Data Available Interrupt pin for performance optimization. The device provides 24 Platform Configuration Registers (PCRs), 6 kByte of free non-volatile memory, and supports up to 10 concurrent sessions. It operates within a standard temperature range of -20°C to +85°C and is housed in a PG-TSSOP-28-2 package.

Feature Summary

• Compliant with TPM Main Specification Version 1.2, Rev. 116
• I²C interface with Standard Mode (≤100 kHz) and Fast Mode (≤400 kHz)
• Dedicated DAVINT# interrupt pin for efficient data availability signaling
• 24 PCRs, 6 kByte NV memory, and support for up to 10 concurrent sessions

Applications

• Google Chromebook / Chromebox platforms
• Battery-operated devices requiring low standby power consumption
• Embedded security solutions for computing platforms

Procurement Notes

Verify the specific ordering suffix against the official Infineon datasheet to confirm the package type and temperature range. The 'TT' suffix indicates the PG-TSSOP-28-2 package with a standard temperature range (-20°C to +85°C). Ensure compatibility with the host system's I²C voltage levels (1.8V or 3.3V) and physical presence detection requirements before procurement.

Selection Notes

Select this component when TPM 1.2 compliance is required for Chromebook certification or general platform security. Choose the PG-TSSOP-28-2 package if through-hole or larger surface-mount footprint is preferred over the VQFN option. Consider the enhanced temperature range variant (XT) only if operation below -20°C is necessary, as the TT variant is limited to the standard range.

Part Context

The SLB9645TT1.2 belongs to the OPTIGA™ TPM SLB 9645 family, which includes variants with different packages (VQFN, TSSOP) and temperature ranges (Standard, Enhanced). This specific part number denotes the TSSOP-28-2 package version designed for standard industrial/commercial temperature applications.

Replacement Considerations

Direct replacements within the same family include SLB9645XQ1.2 (VQFN, Enhanced Temp) and SLB9645VQ1.2 (VQFN, Standard Temp). Cross-family migration to TPM 2.0 devices requires significant firmware and hardware redesign due to specification differences.