SHA104-TFLXAUTHU-CZ-HV

Overview

The SHA104-TFLXAUTHU-CZ-HV is a pre-provisioned secure authentication IC from Microchip Technology, designed for symmetric security in disposable and accessory applications. It features a 128-bit symmetric key system with hardware MAC generation support and an internal NIST SP 800-90A/B/C compliant random number generator. The device includes protected memory for a single symmetric key and 384 bytes of user EEPROM, offering data retention up to 40 years at +55°C. It supports multiple interfaces: 125kbps PWM single-wire serial interface (SWI), 400kHz I²C, and operates on a voltage range of 1.65V to 5.5V. The component utilizes an 8-pin UDFN package.

Feature Summary

• Pre-provisioned symmetric authentication engine for consumable and accessory verification
• Hardware-accelerated MAC generation and high-quality internal random number generator
• Protected storage for single symmetric key and 384-byte user EEPROM with long-term data retention
• Multi-interface connectivity including single-wire serial and I²C options

Applications

• Disposable device authentication
• Accessory identification and verification
• Ecosystem control systems
• Anti-counterfeiting measures

Procurement Notes

Verify the specific ordering suffix to ensure compatibility with your design requirements. The suffix indicates package type, temperature grade, and packing media. Confirm that the pre-provisioned nature of this part aligns with your security strategy, as keys are factory-set. Ensure your host controller supports the required interface protocols, such as I²C or single-wire serial communication, for proper integration into the target application.

Selection Notes

Select this component when a low-cost, pre-configured solution for symmetric authentication is required. It is suitable for applications where managing complex asymmetric cryptography is unnecessary. Consider the available interface options based on host controller capabilities. The wide operating voltage range allows flexibility in power supply design. Verify that the physical protection mechanisms meet the security level needed for the specific deployment environment.

Part Context

This part belongs to the Microchip CryptoAuthentication product family, which focuses on providing secure identity solutions for embedded systems. The SHA104 series is specifically engineered for cost-sensitive applications requiring robust anti-cloning and authentication features. It serves as a companion device to host-side security components, enabling challenge-response pairing to verify the authenticity of peripherals and consumables within a controlled ecosystem.

Replacement Considerations

Consult official Microchip documentation for qualified replacement parts. Verify pinout compatibility and interface support before substitution. Ensure the alternative component meets the same security standards and environmental specifications required for the application.