SHA104-TFLXAUTHS-HV

Overview

The SHA104-TFLXAUTHS-HV is a pre-provisioned secure authentication IC from Microchip's CryptoAuthentication family, designed for disposable and accessory applications. It provides 128-bit symmetric security using hardware-protected key storage and supports CheckMAC operations with host-side devices. The device features a 72-bit unique serial number, 384 bytes of user EEPROM, and a monotonic counter. It operates on a 1.65V to 5.5V supply with sleep current of 130nA. Interface options include 125kbps PWM single-wire interface (SWI) or 400kHz I²C. It includes an internal NIST SP 800-90 compliant RNG and offers physical protection against invasive attacks.

Feature Summary

• Pre-provisioned symmetric authentication engine with hardware-protected key storage
• Integrated high-quality random number generator compliant with NIST standards
• Physical protection mechanisms against invasive attacks and side-channel analysis
• Supports CheckMAC operations for enhanced ecosystem security

Applications

• Disposable device authentication
• Accessory verification in consumer electronics
• Ecosystem control and anti-counterfeiting
• Consumable component identification

Procurement Notes

Verify the specific suffix HV indicates high-voltage tolerance or extended temperature range as per official datasheet. Confirm pre-provisioning status ensures no field programming is required. Ensure host system supports either SWI or I²C interfaces matching the selected package variant. Cross-reference ordering part numbers with Microchip's official distribution channels to avoid counterfeit components.

Selection Notes

Select this component when pre-provisioned symmetric keys are required for rapid deployment in disposable applications. Choose based on interface preference between single-wire PWM or I²C depending on host MCU capabilities. Consider the 1.65V to 5.5V operating range for compatibility with various power domains. Evaluate physical security needs against invasive attack vectors requiring integrated protection mechanisms.

Part Context

This part belongs to the Microchip CryptoAuthentication family, specifically tailored for low-cost secure authentication. It complements other devices like SHA105 for host-side processing. The Trust Platform integration allows for seamless deployment in environments requiring immediate trust establishment without complex key management infrastructure.

Replacement Considerations

SHA104-TFLXAUTH: Standard version without HV specification. SHA104: Base model requiring field provisioning instead of pre-provisioned state.