ATECC508A-MAHDA-T

Specialized ICS Overview

The ATECC508A-MAHDA-T is a CryptoAuthentication™ security IC designed for hardware-based key storage and cryptographic operations. It supports ECDSA, ECDH, and SHA-256 algorithms with NIST P256 curve compatibility. The device features 10 Kb EEPROM for up to 16 keys, a unique 72-bit serial number, and an internal FIPS random number generator. It operates on a 2.0V to 5.5V supply with I2C (up to 1 MHz) or Single-Wire interfaces. Packaged in an 8-pad UDFN (2x3 mm) exposed pad format, it ensures secure data integrity and authentication for embedded systems.

Specialized ICS Feature Summary

• Hardware-accelerated ECC engine supporting ECDSA signature generation/verification and ECDH key agreement using NIST P256 curves.
• Secure storage for up to 16 private/public keys and certificates within 10 Kb EEPROM, protected by intrusion detection mechanisms.
• Integrated high-quality FIPS-compliant Random Number Generator (RNG) and guaranteed unique 72-bit serial number.
• Dual interface options: Standard I2C (up to 1 Mb/s) and High-speed Single Pin Interface (SWI) with configurable GPIO.

Specialized ICS Applications

• IoT Node Security and Identity Authentication
• Secure Boot and Firmware Validation
• Ecosystem Control and Anti-Cloning Protection
• Message Security and Encrypted Data Storage

Specialized ICS Procurement Notes

Verify the 'MAHDA' suffix confirms the 8-UDFN (2x3 mm) package type and tape/reel shipping configuration. Confirm RoHS compliance status via the manufacturer's latest documentation before finalizing procurement specifications.

Specialized ICS Selection Notes

Select this model when a compact surface-mount footprint is required alongside full ECC capabilities. Ensure the host system supports either I2C or Single-Wire protocols. Compare against ATSHA204A if only HMAC-SHA256 authentication is needed, or ATECC108A if monotonic counters are prioritized over ECDH.

Specialized ICS Part Context

This component belongs to the Microchip CryptoAuthentication™ family, specifically the ATECC508A series. It serves as a dedicated security coprocessor complementing general-purpose microcontrollers by offloading complex cryptographic tasks and providing tamper-resistant key storage.

Specialized ICS Replacement Considerations

The ATECC508A is functionally compatible with the ATSHA204A and ATECC108A. When substituting, verify that the target application utilizes ECDH commands, as these are not present in the ATSHA204A. Configuration zone adjustments may be necessary when migrating from older revisions.