ATSHA204A-TCSMU

Specialized ICS Overview

The ATSHA204A-TCSMU is a hardware authentication chip from Microchip Technology’s CryptoAuthentication™ series, housed in an 8-UDFN (2x3) surface-mount package with an exposed pad. It provides secure symmetric authentication using the SHA-256 algorithm and HMAC-SHA256. The device features 4.5KB of EEPROM for key storage, a unique 72-bit serial number, and a high-quality internal random number generator. It supports I2C and Single-Wire Interface (SWI) communication, operating within a voltage range of 2.0V to 5.5V. Designed for low-power applications, it includes sleep modes with current consumption below 150nA.

Specialized ICS Feature Summary

• Hardware-based key storage with 4.5KB EEPROM and 512-bit OTP
• Supports HMAC-SHA256 authentication and challenge-response protocols
• Unique 72-bit serial number and internal RNG
• Dual interface support: I2C (up to 1MHz) and SWI

Specialized ICS Applications

• Printer cartridge and consumable authentication
• Secure boot and firmware verification
• Session key exchange for encrypted communications
• Device identity protection against cloning

Specialized ICS Procurement Notes

Verify the 8-UDFN (2x3) package configuration and Tape & Reel packaging details upon receipt. Confirm that the supplier-device-package matches the specified footprint for PCB integration. Ensure static-sensitive handling procedures are followed during assembly due to the exposed pad design.

Specialized ICS Selection Notes

Select this component when a compact surface-mount solution is required for hardware-level authentication. The 8-UDFN package suits space-constrained designs compared to larger SOIC or QFN options. Verify compatibility with the host system's I2C or SWI interface requirements and ensure the voltage levels align with the 2.0V–5.5V operating range.

Specialized ICS Part Context

This part belongs to the ATSHA204A family, which focuses on cost-effective security for IoT and consumer electronics. The -TCSMU suffix indicates the specific tape-and-reel packaging variant of the standard ATSHA204A authentication chip, facilitating automated surface-mount assembly processes.

Specialized ICS Replacement Considerations

Direct replacements include other ATSHA204A variants with different packages (e.g., ATSHA204A-SSHCZ). For enhanced cryptographic capabilities such as ECC, consider the ATECC508A or ATECC108A families, though pinouts and software libraries may differ.