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Home > Products > Integrated Circuits (ICs) > Embedded > Application Specific Microcontrollers

STMicroelectronics ST33HTPH2X32AHD5

Name: ST33HTPH2X32AHD5
Brand: STMicroelectronics
SKU: ST33HTPH2X32AHD5
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ST33HTPH2X32AHD5

Manufacturer:: STMicroelectronics

Category:: Application Specific Microcontrollers

Package:: 32-VFQFN Exposed Pad

Datasheet:: ST33HTPH2X32AHD5.pdf

Description:: LINEAR IC'S

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Product details

Overview

ST33HTPH2X32AHD5 from STMicroelectronics is a Flash-memory-based Trusted Platform Module (TPM) IC compliant with TCG TPM Library Specification 2.0 Level 0 Rev 138 (errata 1.12) and PC Client Specific TPM Platform Spec 1.04 rev 37. It delivers hardware-rooted security for embedded platforms via I²C interface (up to 400 kHz), supports RSA-2048/3072, ECC NIST P-256/P-384, SHA-2/SHA-3, AES-128/192/256, and operates across −40 °C to 105 °C at 3.3 V.

For engineers reviewing the ST33HTPH2X32AHD5 datasheet, ST33HTPH2X32AHD5 pinout, ST33HTPH2X32AHD5 application, or ST33HTPH2X32AHD5 equivalent, this page provides verified technical context on TPM 2.0 firmware resilience, SP800-193 compliance, GPIO mapping to NV storage indices, fault-injection countermeasures, and integration guidance for Linux® and Windows® IoT Core systems.

Technical Context

The ST33HTPH2X32AHD5 implements a smartcard-class secure MCU architecture with active shield, environmental sensors (power monitoring), and dual random-number generators: FIPS SP800-90A/AIS20-compliant DRBG and SP800-90B/AIS31-compliant TRNG. It enforces cryptographic isolation through hardware-assisted key generation, signing, encryption, and HMAC operations across multiple algorithms.

Its I²C interface adheres strictly to TCG PTP 2.0 r1.04 with five localities, dynamic burst count (max 1936 bytes), 20 µs minimum guard time, and support for slave address reconfiguration (0x08–0x77). The device features self-recovery firmware loader and SP800-193–compliant protection/detection/recovery mechanisms for firmware upgrades.

Key Specifications

Parameter	Value and Actual Design Meaning
TPM Standard	TCG TPM Library Spec 2.0 Level 0 Rev 138 (errata 1.12); PC Client TPM Platform Spec 1.04 rev 37 - ensures interoperability with Windows IoT Core and Linux TPM stacks.
I²C Interface	Up to 400 kHz, 7-bit addressing (0x08–0x77), no clock stretching - enables direct integration with SoC I²C controllers without protocol translation.
Cryptographic Support	RSA-2048/3072, ECC NIST P-256/P-384, SHA-256/384, SHA-3-256/384, AES-128/192/256, HMAC-SHA - meets full TCG 2.0 algorithm requirements for attestation and sealing.
Operating Range	−40 °C to +105 °C at 3.3 V ±10% - qualified for industrial and automotive under-hood applications requiring extended thermal robustness.
Security Certifications	CC EAL4+ (augmented AVA_VAN.5 & ALC_FLR.1), FIPS 140-2 Level 2 (physical security level 3), TCG certified - validated assurance for regulated deployments.
Power Consumption	60 µA in Standby, 4 mA Idle, 17.5 mA Run - enables always-on security with minimal impact on system power budget.
GPIO Capability	4 configurable GPIOs mapped to NV storage indices - allows runtime reassignment of physical pins for platform-specific presence, low-power control, or status signaling.

Pinout & Package

VFQFPN32 package: 32-pin, 5 × 5 mm, 0.5 mm pitch, ultra-thin quad flat no-lead with exposed thermal pad (PIN33, unconnected). Compliant with ECOPACK2 environmental standard.

Pin/Terminal	Circuit Role	Design Meaning
VPS	Power supply input	Accepts 1.8 V ±10% or 3.3 V ±10%; requires mandatory 10 µF + 100 nF decoupling per datasheet Figure 9.
GND	Ground reference	Must connect to main motherboard ground plane; critical for ESD immunity (4 kV HBM, 750 V CDM).
SCL	I²C clock input	Open-drain, no internal pull-up; host must provide external pull-up resistor (typ. 2.2 kΩ).
SDA	I²C bidirectional data	Open-drain, no internal pull-up; shares same external pull-up as SCL.
IRQ	Interrupt output	Active-low, open-drain signal indicating "Locality Change" or "Data Available"; requires external pull-up.
RESET	Hardware reset input	Active-low asynchronous reset; minimum pulse width 1 ms (tWL); initiates full firmware restart.
GPIO_PP	Physical Presence input	Active-high, internal pull-down; signals hardware-level user authorization for sensitive TPM operations.
GPIO_LP	Low-power mode control	Input enabling/disabling Deep Sleep (Standby) mode (TPMLowPowerByGpio); default activation path.
GPIO_C / GPIO_D	General-purpose I/O	Configurable bidirectional pins; default low; function modifiable via NV storage index mapping per TCG spec.
NiC (Pins 2–3, 5–8, 10–15, 17–20, 22–23, 25–26, 30–32)	Not internally connected	No die connection; may be left floating or tied to GND/VPS without functional impact.

Key Features

Feature	Design Value
Fault-tolerant firmware loader	Self-recovery mechanism preserves TPM functionality during interrupted firmware updates - eliminates field failures due to power loss mid-upgrade.
SP800-193 compliance	Hardware-enforced protection, detection, and recovery against firmware corruption - satisfies U.S. federal requirements for secure boot integrity.
Environmental monitoring	Real-time power supply and temperature sensing with active shield - detects fault injection attempts and triggers secure wipe.
Dual RNG architecture	Separate AIS20-compliant DRBG and AIS31-compliant TRNG - ensures cryptographically sound entropy for key derivation and nonces.
Endorsement Key provisioning	Shipped with three pre-provisioned EKs (RSA-2048, ECC P-256, ECC P-384) and corresponding certificates - accelerates OEM root-of-trust deployment.

Applications

Industrial Edge Gateway Security

Automotive Telematics Control Unit (TCU)

Use Scenario: Securing firmware updates and remote diagnostics in IP67-rated edge gateways deployed in factory automation networks.

IC Role / Device Role / Timing Role: Root-of-trust anchor performing measured boot, remote attestation, and sealed storage of TLS keys and OTA update signatures.

Use Value: Enables zero-touch provisioning and continuous integrity verification across 10+ year product lifecycles under −40 °C to 105 °C thermal stress.

Use Scenario: Protecting vehicle identity, V2X certificate chains, and over-the-air (OTA) software updates in ISO 26262 ASIL-B compliant TCUs.

IC Role / Device Role / Timing Role: Hardware-enforced secure boot controller validating bootloader signatures and isolating cryptographic operations from the main application processor.

Use Value: Meets UNECE R155 cybersecurity management system (CSMS) requirements via CC EAL4+ and FIPS 140-2 Level 2 certification evidence.

Medical Imaging Device Authentication

Smart Energy Meter Firmware Integrity

Use Scenario: Ensuring regulatory compliance (FDA 21 CFR Part 11, IEC 62304) for DICOM image encryption keys and audit log integrity in MRI/PET scanners.

IC Role / Device Role / Timing Role: Tamper-resistant key vault generating and storing asymmetric keys used for HIPAA-compliant data encryption and digital signature of diagnostic reports.

Use Value: Provides auditable cryptographic proof of device authenticity and data origin, satisfying FDA premarket submission requirements.

Use Scenario: Preventing unauthorized firmware modification in ANSI C12.22–compliant smart meters deployed in utility substations and distribution grids.

IC Role / Device Role / Timing Role: Secure element enforcing secure boot chain and verifying signed firmware images prior to execution in resource-constrained ARM Cortex-M microcontrollers.

Use Value: Guarantees meter firmware integrity against physical tampering and remote attacks, supporting ANSI/IEEE 1363a and NIST SP 800-193 mandates.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Infineon SLB9670	Supports SPI and LPC interfaces only; no native I²C; uses different firmware update model without self-recovery loader.	Limited to x86 platforms with LPC bus or microcontrollers with dedicated SPI peripherals - not drop-in replaceable for I²C-only designs.	Select when LPC/SPI interface matches existing host architecture and CC EAL4+ certification suffices without SP800-193 recovery.
NXP OPTIGA™ TPM SLB9672	Offers identical I²C interface and TCG 2.0 compliance but lacks GPIO_LP and GPIO_PP pins; uses different TRNG implementation (not AIS31-certified).	Suitable for compact consumer devices where physical presence signaling is omitted and lower ESD rating (2 kV HBM) is acceptable.	Choose for cost-sensitive consumer IoT where full industrial ESD (4 kV HBM) and GPIO flexibility are non-critical.

Compared with SLB9670 and SLB9672, ST33HTPH2X32AHD5 uniquely combines I²C-native operation, SP800-193–mandated firmware recovery, 4 kV HBM ESD tolerance, and four programmable GPIOs - making it the only option qualified for high-reliability industrial and automotive applications requiring both interface simplicity and certified resilience.

Availability

ST33HTPH2X32AHD5 is available at Aetrix Electronics and suitable for industrial edge gateways, automotive telematics control units, medical imaging devices, and smart energy meters requiring stable component supply across extended temperature ranges and long lifecycle commitments.

Supply support for ST33HTPH2X32AHD5 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 modules built on smartcard-class secure MCUs - engineered specifically for embedded platforms needing hardware-rooted trust, firmware resilience, and regulatory compliance out-of-the-box.

FAQ

What certifications does the ST33HTPH2X32AHD5 hold?

The ST33HTPH2X32AHD5 holds Common Criteria EAL4+ (augmented with AVA_VAN.5 and ALC_FLR.1), FIPS 140-2 Level 2 (with physical security level 3), and full TCG certification. These certifications validate its resistance to side-channel attacks, fault injection, and physical tampering - meeting requirements for government, healthcare, and industrial deployments.

How does the self-recovery firmware loader work during an interrupted update?

The self-recovery loader maintains redundant firmware images and checksum metadata in protected Flash sectors. If power loss or communication failure occurs mid-update, the device automatically validates the active image on next boot and restores from backup if corrupted - ensuring continuous TPM availability without manual intervention or host-side recovery logic.

Can GPIO_PP and GPIO_LP be repurposed for custom functions?

Yes - both GPIO_PP and GPIO_LP can be remapped to alternate functions via NV storage index configuration, as defined in the TCG TPM Library Specification. This allows OEMs to assign them to platform-specific roles like tamper detection inputs or wake-from-standby triggers, provided the new behavior complies with TCG-defined NV access policies.

What Linux kernel versions support the ST33HTPH2X32AHD5 I²C interface?

The official STMicroelectronics TCG-TPM-I2C driver supports Linux kernels 5.10.y and later, with full integration documented in Application Note AN5714. Kernel 6.x includes upstream TCG I²C driver support, and ST recommends disabling the optional I²C checksum feature to ensure compatibility with standard Linux TPM subsystem behavior.

ST33HTPH2X32AHD5 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: ST33

Package/Case:: 32-VFQFN Exposed Pad

Packaging:: Bulk

Product Status:: Active

Programmable:: -

Applications:: Trusted Platform Module (TPM)

Core Processor:: SecurCore® SC300™

Program Memory Type:: FLASH

Controller Series:: ST33TPHF2ESPI

RAM Size:: -

Interface:: I2C

Number of I/O:: 4

Voltage - Supply:: 1.8V, 3.3V

Operating Temperature:: -40°C ~ 105°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 32-VFQFPN (5x5)

ST33HTPH2X32AHD5 FAQ

1.How can I place an order for ST33HTPH2X32AHD5 through Aetrix?

Please submit a Request for Quotation (RFQ) for ST33HTPH2X32AHD5 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ST33HTPH2X32AHD5 reliable?

The price and inventory of ST33HTPH2X32AHD5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST33HTPH2X32AHD5 is usually 5 days.

3.What payment methods are accepted for ST33HTPH2X32AHD5?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST33HTPH2X32AHD5 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ST33HTPH2X32AHD5?

ST33HTPH2X32AHD5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ST33HTPH2X32AHD5 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ST33HTPH2X32AHD5?

For technical support, including ST33HTPH2X32AHD5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST33HTPH2X32AHD5 requirements.

6.How does Aetrix verify that ST33HTPH2X32AHD5 is sourced from the original manufacturer or authorized distributors?

All ST33HTPH2X32AHD5 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ST33HTPH2X32AHD5 meets industry standards.

7.What is the process for return or replacement of ST33HTPH2X32AHD5?

All ST33HTPH2X32AHD5 units undergo pre-shipment inspection (PSI). If there is an issue with ST33HTPH2X32AHD5, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ST33HTPH2X32AHD5 part is unused and in its original packaging.

Return procedure for ST33HTPH2X32AHD5:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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