Overview
The Microchip Technology ATSHA204A-SSHDA-B is a cost-effective, symmetric authentication solution designed to provide robust security features for a wide range of applications. This device is part of the CryptoAuthentication family and integrates the SHA-256 hash algorithm with a 4.5Kb EEPROM, making it ideal for secure key generation, storage, and authentication. The ATSHA204A-SSHDA-B is particularly suited for applications requiring fast and secure symmetric authentication, such as IoT devices, smart meters, and automotive systems. With its tiny packaging and multiple I/O options, including a single-wire interface and I2C interface, it is well-suited for space-constrained embedded systems.
Key Specifications
| Device Name | ATSHA204A |
|---|---|
| Algorithm Type | SHA256 |
| Standby Typical (uA) | 0 |
| Interface Type | Single-wire; I2C |
| Package/Case | SOP8 (8-pin SOIC) |
| Supply Voltage Range | 2.0V to 5.5V |
| Sleep Current | < 150nA |
| EEPROM Capacity | 4.5Kb |
| Key Storage | Up to 16 keys |
| Serial Number | Guaranteed unique 72-bit |
| Random Number Generator (RNG) | Internal, high-quality RNG |
Key Features
- Cost-effective symmetric authentication solution
- Fast authentication with SHA-256 hash algorithm and MAC/HMAC options
- Easy key management with protected hardware-based key storage
- Best suited for counterfeit prevention with secure host and client operations
- Multiple I/O options: UART-compatible high-speed single-wire interface and 1MHz I2C interface
- 4.5Kb EEPROM for keys and data storage
- Internal, high-quality random number generator (RNG)
- Guaranteed unique 72-bit serial number
- Tamper-resistant hardware with internal clocks and voltage generation, encrypted memories, and tamper detection
- Ultra-low sleep current of less than 150nA
Applications
The ATSHA204A-SSHDA-B is commonly used in secure authentication applications, including:
- IoT devices
- Smart meters
- Automotive systems
It provides cryptographic functions for secure key generation, storage, and authentication, enhancing device security against threats like counterfeiting, cloning, and unauthorized access.
Q & A
- What is the primary function of the ATSHA204A-SSHDA-B?
The primary function of the ATSHA204A-SSHDA-B is to provide cost-effective, symmetric authentication using the SHA-256 hash algorithm.
- What type of package does the ATSHA204A-SSHDA-B come in?
The ATSHA204A-SSHDA-B comes in an 8-pin SOIC (Small Outline Integrated Circuit) package.
- What are the interface options for the ATSHA204A-SSHDA-B?
The device supports both a single-wire interface and a 1MHz I2C interface.
- What is the supply voltage range for the ATSHA204A-SSHDA-B?
The supply voltage range is from 2.0V to 5.5V.
- How much EEPROM capacity does the ATSHA204A-SSHDA-B have?
The device has a 4.5Kb EEPROM capacity.
- Does the ATSHA204A-SSHDA-B have a unique serial number?
Yes, it has a guaranteed unique 72-bit serial number.
- What security features does the ATSHA204A-SSHDA-B include?
The device includes tamper-resistant hardware, internal clocks and voltage generation, encrypted memories, tamper detection, and secure production test methodologies.
- What are some common applications for the ATSHA204A-SSHDA-B?
Common applications include IoT devices, smart meters, and automotive systems.
- How does the ATSHA204A-SSHDA-B enhance system security?
It enhances system security by providing cryptographic functions for secure key generation, storage, and authentication, protecting against counterfeiting, cloning, and unauthorized access.
- What is the sleep current of the ATSHA204A-SSHDA-B?
The sleep current is less than 150nA.
