ST33TPHF20SPI STMicroelectronics Integrated Circuit (Quad Flat No-Lead) In Stock
The ST33TPHF20SPI is a flash-based TPM 2.0 security chip from STMicroelectronics with an SPI interface, operating at 1.8 V and housed in a 32-pin QFN package. It provides hardware-rooted trust for platform security, supporting cryptographic functions including RSA, ECC, SHA-256, and AES-128. Ideal for embedded systems requiring secure key storage and measured boot in industrial and computing applications.
- Manufacturer
- STMicroelectronics
- Package
- Quad Flat No-Lead
- Pin Count
- 33
- Lifecycle
- ACTIVE
- Datasheet
- ST33TPHF20SPI Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 105.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- TPM 2.0 compliant hardware security module with SPI interface
- 1.8 V supply voltage with CMOS technology for low-power operation
- 32-pin QFN (Quad Flat No-Lead) package enabling compact PCB footprint
- Hardware-accelerated cryptography: RSA, ECC, SHA-256, and AES-128
- Flash-based non-volatile secure key storage
- Supports measured boot and platform integrity verification
Applications
The ST33TPHF20SPI is designed for embedded platforms requiring hardware-rooted security, including industrial PCs, network equipment, and IoT gateways that must comply with TPM 2.0 standards. It enables secure boot, remote attestation, and encrypted credential storage in server and workstation designs. The device is also used in automotive infotainment systems and smart metering applications where tamper-resistant cryptographic operations are mandatory.
Specifications
| Date Of Intro | 2018-02-06 |
| JESD-30 Code | S-XQCC-N32 |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | LCC32,.2SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Supply Voltage-Nom | 1.8V |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| uPs/uCs/Peripheral ICs Type | CRYPTOGRAPHIC AUTHENTICATOR |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.31.00.30 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for ST33TPHF20SPI:
Frequently Asked Questions
What supply voltage does the ST33TPHF20SPI require, and how does that affect system design?
The ST33TPHF20SPI operates at a nominal supply voltage of 1.8 V, making it compatible with modern low-voltage SoCs and microcontrollers. Designers integrating this TPM into a 3.3 V system must include a voltage regulator or level shifter on the SPI bus to ensure proper signal levels and avoid damage to the device.
Which cryptographic algorithms does the ST33TPHF20SPI support for secure key management?
The ST33TPHF20SPI supports RSA (up to 2048-bit), ECC (up to 256-bit), SHA-256 hashing, and AES-128 symmetric encryption as per TPM 2.0 specifications. These hardware-accelerated algorithms enable secure key generation, digital signing, and encrypted data storage without exposing sensitive material to software layers, significantly reducing attack surfaces in embedded designs.
How does the ST33TPHF20SPI's 32-pin QFN package influence PCB layout for space-constrained designs?
The 32-pin QFN package measures 5 mm x 5 mm with a 0.5 mm pitch, consuming minimal PCB area while providing an exposed thermal pad for improved heat dissipation. This compact footprint makes the ST33TPHF20SPI suitable for slim industrial boards, embedded computing modules, and space-constrained IoT designs where a larger package such as SOIC-28 would be impractical.
When is the ST33TPHF20SPI the right choice over a software-based TPM emulation?
Hardware TPM implementations like the ST33TPHF20SPI provide tamper-resistant storage and isolated cryptographic processing that software TPM emulators running on the host CPU cannot match. For applications requiring Windows 11 compliance, FIPS 140-2 certification, or protection against cold-boot attacks, a discrete hardware TPM operating on its own 32-pin silicon die ensures cryptographic keys are never exposed in host memory, offering measurably stronger security guarantees than software alternatives.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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