ST33TPHF2XSPI STMicroelectronics Integrated Circuit (Quad Flat No-Lead) In Stock
STMicroelectronics ST33TPHF2XSPI is a flash-based TPM 2.0 security chip with SPI interface, 3.3 V operation, hardware RNG, and QFN package for embedded platform integrity. From $3.80 in stock worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Quad Flat No-Lead
- Pin Count
- 33
- Lifecycle
- ACTIVE
- Datasheet
- ST33TPHF2XSPI Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ST33TPHF2XSPI?
- TCG TPM 2.0 compliant with hardware root-of-trust, RSA-2048 and ECC-256 bit cryptographic engines
- SPI interface at up to 33 MHz with 3.3 V supply for direct integration into BIOS security chains
- Flash-based non-volatile storage with internal hardware random number generator for secure key generation
What is ST33TPHF2XSPI used for?
ST33TPHF2XSPI serves as a hardware security anchor in laptops, embedded PCs, and industrial controllers requiring TPM 2.0 compliance for OS secure boot and measured boot chains. Its SPI interface integrates directly with BIOS/UEFI firmware on x86 and ARM platforms, supporting Windows 11 TPM requirements and industrial IoT device attestation. The QFN package suits compact motherboard designs where board real estate is constrained.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the ST33TPHF2XSPI datasheet?
ST33TPHF2XSPI Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for ST33TPHF2XSPI?
Compatible alternatives and drop-in replacements for ST33TPHF2XSPI:
MCU 32-Bit ST33 SC300 RISC ROMLess 1.8V/2.5V/3.3V 32-Pin VFQFPN T/R - Tape and Reel (Alt: ST33TPHF2ESPIQFN)
Frequently Asked Questions
What cryptographic algorithms does ST33TPHF2XSPI support at the hardware level?
ST33TPHF2XSPI implements TCG TPM 2.0 mandated algorithms including RSA-2048, ECC P-256 bit, SHA-1, and SHA-256 in dedicated hardware engines, eliminating software overhead for key operations. The on-chip true hardware random number generator produces entropy compliant with NIST SP 800-90A, essential for secure key generation in platform identity certificates.
How does the SPI interface speed of ST33TPHF2XSPI fit into a typical BIOS security chain?
The device operates on the SPI bus at up to 33 MHz with a 3.3 V supply, making it compatible with standard LPC/SPI BIOS flash bus architectures on Intel and AMD platforms. During pre-boot, the BIOS reads PCR registers from the TPM to verify the boot chain integrity, adding only a few milliseconds of latency at 33 MHz compared to I2C-based TPMs running at 400 kHz.
For embedded industrial IoT designs, what advantages does a discrete TPM like ST33TPHF2XSPI offer over firmware TPM?
A discrete TPM such as ST33TPHF2XSPI physically isolates cryptographic keys from the main CPU in tamper-resistant flash, so even a compromised OS cannot extract private keys. Firmware TPMs running in the CPU trust zone share silicon resources with untrusted code and are vulnerable to side-channel attacks at the microarchitectural level. The QFN package allows the ST33TPHF2XSPI to be placed on a separate power domain, enabling attestation even when the host SoC is in a low-power state.
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Why Buy from FindMyChip
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.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
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