SHA104-RBVCZ-B

Overview

The Microchip Technology SHA104-RBVCZ-B is a cryptographic authentication device from the CryptoAuthentication™ family, designed for accessory and disposable applications. It provides 128-bit symmetric security using hardware-based key storage and MAC generation support. The component features an internal NIST SP 800-90A/B/C compliant random number generator (RNG), field-programmable EEPROM with 384 bytes of user memory, and a monotonic counter limited to 10,000 uses. It operates on a voltage supply range of 1.65V to 5.5V with a nominal sleep current of 130nA. The specific RBVCZ-B suffix indicates a 3-Lead Contact package variant utilizing the Single-Wire Interface (SWI).

Feature Summary

• Hardware-accelerated 128-bit symmetric security with protected key storage and SHA-256 support.
• Integrated high-quality NIST SP 800-90A/B/C certified Random Number Generator (RNG).
• Field-programmable EEPROM providing 384 bytes of user memory and 40-year data retention at +55°C.
• Monotonic counter with a maximum count value of 10,000, attachable to keys for usage limiting.

Applications

• Accessory and disposable component authentication via challenge-response or shared key protocols.
• Ecosystem control and anti-cloning validation for OEM systems.
• Secure identification in battery-powered devices requiring minimal pin counts.

Procurement Notes

Verify that the RBVCZ-B suffix corresponds to the 3-Lead Contact package with Single-Wire Interface (SWI) capabilities. Confirm that the application design supports parasitic power mode if VCC is not independently supplied, as this package option allows operation with only two pins connected. Ensure the host system firmware is compatible with the SWI protocol timing specifications.

Selection Notes

Select the SHA104-RBVCZ-B when a minimal footprint and reduced interconnect complexity are required for the accessory side of an authentication system. This 3-lead contact package is suitable for applications where PCB space is constrained or direct metal-to-metal contact is preferred over standard surface-mount connectors. Compare against the I2C variants if bidirectional clocking is necessary for the host interface.

Part Context

The SHA104 is part of the Microchip CryptoAuthentication™ product family, intended as a companion device to microcontrollers or host-side security ICs like the SHA105. It is designed to be microcontroller agnostic and supports various provisioning flows through the Trust Platform, including TrustFLEX and TrustCUSTOM services for secure credential injection.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. For equivalent functionality, consider other SHA10x series members such as the SHA105 for host-side implementations, though package and interface differences must be evaluated.