SHA104-TFLXAUTHU-CZ

Overview

The SHA104-TFLXAUTHU-CZ is a Microchip CryptoAuthentication™ device providing 128-bit symmetric security for disposable and ecosystem control applications. It features hardware-based key storage, MAC generation support, and an internal NIST-certified RNG. The component operates on a 1.65V to 5.5V supply with a nominal sleep current of 130nA. It includes 384 bytes of user EEPROM and a monotonic counter (max 10,000). This specific variant utilizes the TrustFLEX provisioning service and is housed in an 8-pad UDFN (2mm x 3mm) package.

Feature Summary

• TrustFLEX Provisioning: Pre-configured secure element with customer-unique credentials via Secure Exchange Package.
• Hardware Security: Protected symmetric key storage, SHA-256 MAC generation, and NIST SP 800-90A/B/C compliant RNG.
• Memory & Counters: 384-byte field-programmable EEPROM with 40-year data retention at +55°C; monotonic counter limited to 10,000 uses.
• Interface Options: Supports 400kHz I²C or 125kbps PWM Single-Wire Interface (SWI); SWI supports parasitic power mode.

Applications

• Accessory and disposable component authentication
• Ecosystem control and anti-counterfeiting validation
• Challenge-response or shared-key authentication systems

Procurement Notes

Verify that the ordering suffix 'TFLX' corresponds to the TrustFLEX provisioning flow, which requires a valid Secure Exchange Package generated through the Microchip Secure Provisioning System. Ensure the customer is designated in this package to authorize ordering. Confirm the 'U' suffix matches the required 8-pad UDFN package type and industrial temperature range (-40°C to +105°C).

Selection Notes

Select this variant when unique customer credentials are required for a pre-defined configuration, rather than generic pre-provisioned devices. Choose the 8-pad UDFN package for surface-mount applications requiring a small footprint. Consider the SWI interface if minimizing GPIO count or enabling parasitic power operation is necessary for the accessory side.

Part Context

This part belongs to the SHA104 family within the Microchip CryptoAuthentication™ portfolio. It serves as a companion device to host-side controllers like the SHA105. Unlike standard SHA104 parts, the TFLX suffix indicates integration with the TrustFLEX platform, allowing for customized credential injection while maintaining the core cryptographic hardware specifications of the series.

Replacement Considerations

SHA104-TCSMU: Equivalent TrustCUSTOM variant for fully customizable configurations. SHA104-TFLXAUTHS: Same TrustFLEX functionality but in an 8-pin SOIC package. Standard SHA104 variants without the TFLX suffix lack the specific TrustFLEX provisioning structure.