ST33GTPMASPIS20 STMicroelectronics Integrated Circuit (Small Outline Packages) In Stock
STMicroelectronics ST33GTPMASPIS20 is a flash-memory-based TPM 2.0 security chip certified for automotive applications with an SPI host interface in a compact SO-8 package. It provides hardware-based root of trust, secure key storage, and cryptographic acceleration for in-vehicle networks. Available from authorized distributors with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- ST33GTPMASPIS20 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- TPM 2.0 compliant with ISO/IEC 11889 and TCG automotive profile, providing hardware root of trust for in-vehicle security architectures
- SPI interface at up to 43 MHz enables fast host communication with automotive ECUs and telematics control units
- Flash-based non-volatile storage retains cryptographic keys and platform configuration registers across power cycles without a battery
- AEC-Q100 qualified for automotive-grade reliability with extended operating temperature range suitable for harsh under-hood environments
Applications
The ST33GTPMASPIS20 is designed for automotive electronic control units, telematics modules, and vehicle gateway controllers where hardware-enforced secure boot and cryptographic attestation are required to meet ISO 21434 cybersecurity standards. Its TPM 2.0 implementation enables secure storage of TLS session keys and AUTOSAR SecOC authentication credentials, protecting CAN, Ethernet, and V2X communication links against spoofing attacks. Autonomous driving and advanced driver assistance systems benefit from its hardware-backed identity management and firmware integrity verification capabilities across the full automotive temperature range.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for ST33GTPMASPIS20:
Frequently Asked Questions
How does ST33GTPMASPIS20 support secure boot in automotive ECU designs?
The ST33GTPMASPIS20 stores a hardware-protected root-of-trust public key in its flash NVM and uses TPM 2.0 Platform Configuration Registers (PCRs) to record SHA-256 digests of each boot stage. The host ECU extends these PCRs during boot and seals session keys only when the measurement chain matches the expected golden values, ensuring that modified or tampered firmware cannot access 256-bit AES encryption keys or ECC-384 signing credentials. This binding process takes under 50 ms via the 43 MHz SPI interface, adding negligible latency to ECU startup sequences.
Which automotive communication security standards does ST33GTPMASPIS20 help satisfy?
The ST33GTPMASPIS20 supports AUTOSAR SecOC message authentication by providing hardware-backed HMAC-SHA-256 and RSA-2048 operations, helping designs comply with ISO 21434 cybersecurity engineering requirements and UNECE WP.29 R155 vehicle cybersecurity regulations. Its TPM 2.0 attestation functions also satisfy requirements from AUTOSAR Adaptive Platform security profiles, making it applicable to domain controllers and central vehicle computers that must authenticate V2X and cloud-update packets before execution.
How does the ST33GTPMASPIS20's AEC-Q100 rating compare to standard commercial TPM chips for vehicle designs?
AEC-Q100 Grade 2 qualification subjects the ST33GTPMASPIS20 to automotive stress screening including high-temperature operating life at 105 °C for 1000 hours, temperature cycling between -40 °C and +125 °C for 1000 cycles, and humidity bias tests, whereas commercial TPM chips are typically only validated to 0 °C to +70 °C. This makes the ST33GTPMASPIS20 suitable for passenger compartment, ADAS sensor, and gateway controller applications where junction temperatures can briefly exceed 85 °C, ensuring cryptographic key integrity over a 15-year vehicle lifetime.
Related Guides
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
ADAQ7768-1 Design Guide for Precision Vibration and Dynamic Signal Measurement
Design ADAQ7768-1 precision data acquisition channels for vibration and dynamic sensing with the right bandwidth, reference, clock, and layout choices.
Jun 30, 2026
AD5204BRZ10 Design Guide for SPI-Controlled Gain and Offset Calibration
Design AD5204BRZ10 digital potentiometer calibration loops with bounded trim span, safe wiper current, clean SPI routing, and reliable startup codes.
Jun 30, 2026
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.”