STMicroelectronics ST33HTPH2X32AHD4

Overview

ST33HTPH2X32AHD4 from STMicroelectronics is a Flash-memory-based Trusted Platform Module (TPM) 2.0 security IC compliant with TCG TPM Library 2.0 Level 0 Rev 138 and PC Client Specific Platform Spec 1.03, featuring Arm® SecurCore® SC300™ 32-bit RISC core, SPI interface up to 33 MHz, and extended temperature operation from −40 °C to 105 °C at 3.3 V supply.

For engineers reviewing the ST33HTPH2X32AHD4 datasheet, ST33HTPH2X32AHD4 pinout, ST33HTPH2X32AHD4 application, or ST33HTPH2X32AHD4 equivalent, key selection considerations include FIPS 140-2 Level 2 certification, SP800-193 compliance for fault recovery, hardware-enforced RNG (SHA256 DRBG + AIS-31 PTG2 TRNG), and support for RSA/ECC/SHA/AES cryptographic suites in a VFQFPN32 package.

Technical Context

This TPM implements a hardened Arm SecurCore SC300 processor with active shield, environmental sensors, and fault-injection countermeasures. It executes TPM 2.0 firmware with self-recovery capability during interrupted updates and supports full cryptographic service stacks including ECDAA on BN-256, ECDSA on NIST P-256/P-384, and RSA-2048 key generation.

The device integrates dual-voltage operation (1.8 V or 3.3 V), 4 kV HBM ESD protection, and SPI slave interface with dedicated PIRQ interrupt and physical presence GPIO. Its firmware version 0x00.01.01.01 (1.257) is designated Active per ST's ordering matrix, enabling secure boot, remote attestation, and key binding in endpoint systems.

Key Specifications

Pinout & Package

Delivered in VFQFPN32 (5 × 5 mm, 0.5 mm pitch) ECOPACK2 package with exposed thermal pad (Pin 33, not internally connected). Package supports reflow soldering and meets RoHS/ECOPACK environmental standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SLB9670 and NPCT750, ST33HTPH2X32AHD4 uniquely delivers FIPS 140-2 Level 2 + CC EAL4+ + SP800-193 in a single SPI-only VFQFPN32 package with −40°C to 105°C operation-making it optimal for industrial, medical, and automotive edge devices requiring highest-tier, field-proven trust anchors.

Availability

ST33HTPH2X32AHD4 is available at Aetrix Electronics and suitable for secure boot servers, industrial edge gateways, medical imaging workstations, and automotive infotainment head units requiring stable component supply across long product lifecycles.

Supply support for ST33HTPH2X32AHD4 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, analog ICs, MEMS, and secure elements for industrial, automotive, and consumer markets.

The STSAFE-TPM product line delivers standardized, certified TPM 2.0 solutions targeting embedded, PC, mobile, and computing applications requiring hardware-rooted trust, with emphasis on Common Criteria and FIPS compliance for regulated sectors.

FAQ

What certifications does ST33HTPH2X32AHD4 hold?

ST33HTPH2X32AHD4 holds FIPS 140-2 Level 2 (physical security level 3), Common Criteria EAL4+ per TPM 2.0 Protection Profile (AVA_VAN.5), and SP800-193 compliance for firmware protection, detection, and recovery. It is also TCG-certified and compliant with Microsoft Windows 10, Linux drivers, and Intel vPro technology.

How does the fault-tolerant firmware loader operate?

The fault-tolerant firmware loader uses atomic update blocks and redundant metadata storage to ensure TPM remains fully functional even if power loss or reset occurs mid-update. Upon restart, it automatically validates firmware integrity and rolls back to last known-good image without host intervention or external tools.

Can ST33HTPH2X32AHD4 operate at both 1.8 V and 3.3 V simultaneously?

No. VPS accepts either 1.8 V or 3.3 V-not both. Voltage selection determines operational temperature range: 1.8 V enables −25°C to +85°C commercial operation; 3.3 V enables −40°C to +105°C extended operation. Mixed-voltage operation is not supported and may damage the device.

What cryptographic algorithms are accelerated in hardware?

All core cryptographic operations-including RSA-2048 key generation/signature, ECC NIST P-256/P-384 key exchange and signing, SHA-256/384/3 hashing, AES-128/192/256 encryption, and HMAC-are executed in dedicated hardware accelerators. The RNG combines hardware TRNG and DRBG engines, eliminating software-only bottlenecks.