STSAFE-A100SO8 STMicroelectronics TVS Diode (Uni-directional) (Small Outline Packages) In Stock
The STSAFE-A100SO8 is a CMOS cryptographic authenticator IC from STMicroelectronics operating from 1.62 V to 5.5 V, providing hardware-based secure storage, authentication, and key management. Housed in an 8-pin SOIC surface-mount package, it targets industrial-grade IoT and embedded security applications. Available in stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE UNCONFIRMED
- Datasheet
- STSAFE-A100SO8 Datasheet PDF
- Category
- TVS Diode (Uni-directional)
- Temp Range
- -40.0°C to 105.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Hardware cryptographic authenticator with secure key storage operating from 1.62 V to 5.5 V supply, supporting ECDSA and symmetric authentication algorithms
- Industrial temperature grade CMOS design in 8-pin SOIC SMT package with I2C interface for easy integration into existing microcontroller designs
- Tamper-resistant secure element architecture protects private keys and credentials from cloning attacks in IoT node authentication applications
Applications
The STSAFE-A100SO8 is used in IoT device authentication, secure boot verification, and field-device identity management in industrial automation, smart energy meters, and connected medical equipment. It enables manufacturers to provision unique device certificates during production and allows cloud servers to cryptographically verify device identity without exposing private keys. Its wide supply voltage range of 1.62 V to 5.5 V and industrial temperature rating make it suitable for battery-powered sensor nodes and harsh-environment control systems.
Specifications
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 1.62V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Position | DUAL |
| uPs/uCs/Peripheral ICs Type | CRYPTOGRAPHIC AUTHENTICATOR |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | 3A991.A.2 |
| HTS Code | 8542.31.00.01 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for STSAFE-A100SO8:
Frequently Asked Questions
What supply voltage range does STSAFE-A100SO8 support, and which microcontroller voltage domains does it cover?
The STSAFE-A100SO8 operates from 1.62 V to 5.5 V, covering 1.8 V, 3.3 V, and 5 V microcontroller I/O domains without level shifters. This wide range allows it to interface directly with low-power ARM Cortex-M0 systems at 1.8 V, standard 3.3 V MCUs, and legacy 5 V 8-bit microcontrollers in a single silicon design.
Which cryptographic operations does STSAFE-A100SO8 perform, and how does that prevent clone attacks in IoT deployments?
The STSAFE-A100SO8 supports ECDSA (Elliptic Curve Digital Signature Algorithm) asymmetric authentication and symmetric key-based operations. Private keys are generated and stored entirely inside the tamper-resistant secure element and are never exported in plaintext, so even if an attacker gains physical access to a device, they cannot extract the key to clone the device's identity. A cloud server verifies authenticity using only the public certificate.
What communication interface does STSAFE-A100SO8 use, and how many PCB signal lines does it require?
The STSAFE-A100SO8 communicates over a standard I2C bus, requiring only 2 signal lines — SCL (clock) and SDA (data) — plus VCC and GND, for a total of 4 connections. This minimal wiring makes it straightforward to add hardware authentication to any existing MCU design that already has an I2C bus, without redesigning the PCB or firmware stack significantly.
In which industrial and IoT application segments is STSAFE-A100SO8 an appropriate security element choice?
STSAFE-A100SO8 is well matched to applications requiring device-level authentication at scale, including smart electricity meters (IEC 62056 compliant energy nodes), industrial field controllers that authenticate to SCADA systems, and medical device accessory authentication under FDA cybersecurity guidance. Its industrial temperature grade supports operation across -40°C to +85°C, covering outdoor smart-grid deployments and factory floor environments.
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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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