Design Win

Automotive TPM 2.0 device with an SPI interface

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Product overview


The ST33GTPMASPI is a cost-effective and high-performance trusted platform module (TPM) targeting automotive and embedded systems.

The product implements the functions defined by the Trusted Computing Group ( in the TCG Trusted Platform Module Library Specifications version 2.0 Level 0 Revision 138 and errata version 1.4. It is also based on the TCG PC client-specific TPM Platform specifications rev1.03. The applicable protection profile is TCG Protection Profile for PC Client Specific TPM 2.0.

The product also supports the ability to upgrade the TPM firmware thanks to a persistent Flash memory loader application to support new standard evolutions.

  • All features

      • AEC-Q100 qualified
    • TPM features
      • Flash-memory-based Trusted Platform Module (TPM)
      • TPM 2.0 compliant with Trusted Computing Group (TCG) Trusted Platform Module (TPM) Library specifications 2.0, Level 0, Revision 138 and TCG PC Client Specific TPM Platform Specifications 1.03
      • Fault-tolerant firmware loader that keeps the TPM fully functional when the loading process is interrupted (self-recovery)
      • SP800-193 compliant for protection, detection and recovery requirements
      • Targeted certifications:
        • CC according to TPM 2.0 PP at EAL4+
        • FIPS 140-2 level 2
        • (physical security level 3)
      • SPI support at up to 18 MHz
      • Support for hardware physical presence
    • Hardware features
      • Arm® SecurCore® SC300™ 32-bit RISC core
      • Highly reliable Flash memory technology:
        • 500 000 cycles on the full temperature range
        • 25 years’ lifetime at 85 °C
        • 20 years’ lifetime at 105 °C
      • Automotive grade 2: −40 °C to 105 °C
      • ESD (electrostatic discharge) protection against voltages greater than 4 kV (HBM)
      • 1.8 V or 3.3 V supply voltage range
      • 20-lead thin shrink small outline ECOPACK MSL1 package
    • Security features
      • Active shield and environmental sensors
      • Monitoring of environmental parameters (power and clock)
      • Hardware and software protection against fault injection
      • SP800-90A-compliant deterministic random bit generator (DRBG) built with an AIS-31 class PTG2-compliant true random generator (TRNG)
      • Cryptographic algorithms:
        • RSA key generation (1024 or 2048 bits)
        • RSA signature (RSASSA-PSS, RSASSA-PKCS1v1_5)
        • RSA encryption (RSAES-OAEP, RSAESPKCS1-v1_5)
        • SHA-1, SHA-2 (256 and 384 bits), SHA-3 (256 and 384 bits)
        • HMAC SHA-1, SHA-2 and SHA-3
        • AES-128,192 and 256 bits
        • TDES 192 bits
        • ECC (NIST P-256, P-384 curves): Key generation, ECDH and ECDSA, ECSchnorr
        • ECDAA (BN-256 curve)
        • Device provided with 3 EK and EK certificates (RSA2048, ECC NIST P_256 and ECC NIST P_384)
        • Device provisioned with 3 RSA key pairs to reduce the TPM provisioning time
    • Product compliance
      • Compliant with TCG test suite for TPM 2.0
      • Common Criteria certifications:
        • EAL 4+ on TCG TPM2.0 protection profile
        • EAL 5+ on hardware
      • Targets FIPS 140-2 level 2 certification (physical security level 3)

EDA Symbols, Footprints and 3D Models

STMicroelectronics - ST33GTPMASPI

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
TSSOP-20 Automotive N/A




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(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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