SHA104-RBVCZ-T

Overview

The Microchip SHA104-RBVCZ-T is a CryptoAuthentication™ series cryptographic co-processor designed for accessory and disposable applications. It provides 128-bit symmetric security using hardware-based key storage and MAC generation support. The device features a NIST SP 800-90A/B/C certified 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 range of 1.65V to 5.5V with a nominal sleep current of 130nA. This specific part number utilizes the 3-Lead Contact package (2.5mm x 6.5mm) and supports the Single-Wire Serial Interface (SWI).

Feature Summary

• Hardware-accelerated symmetric authentication with protected key storage.
• NIST-certified internal high-quality Random Number Generator (RNG).
• Field-programmable EEPROM: 384-byte user memory with 40-year data retention at +55°C.
• Monotonic counter (max 10,000) attachable to keys for usage limiting.
• Unique 72-bit serial number for device identification.

Applications

• Accessory and disposable component authentication.
• Ecosystem control and anti-cloning systems.
• Host-side CheckMAC verification when paired with SHA105.

Procurement Notes

Verify that the RBVCZ suffix corresponds to the 3-Lead Contact package variant. Confirm the I/O type matches system requirements, as this model specifies the Single-Wire interface. Ensure provisioning needs align with Trust Platform services if unique credentials are required.

Selection Notes

Select this component for applications requiring minimal pin counts on the accessory side. The 3-Lead Contact package allows for parasitic power operation via the SWI interface. Verify compatibility with host firmware supporting challenge-response or shared key protocols.

Part Context

This device belongs to the Microchip CryptoAuthentication™ family, intended as a companion to microcontrollers. It complements host-side devices like the SHA105 for robust ecosystem security. The SHA104 focuses on cost-effective, low-pin-count solutions for consumables.

Replacement Considerations

SHA104 variants with different packages (e.g., 8-pad UDFN, 8-lead SOIC) offer identical functionality but require PCB layout adjustments. SHA106 is an alternative for true 2-wire implementations with integrated capacitors.

FAQ

Can the SHA104 operate in parasitic power mode?

Yes, when configured with the Single-Wire Serial Interface (SWI), the device can be powered through the signal line, reducing the connection to two pins.

What is the maximum count value for the monotonic counter?

The monotonic counter has a maximum value of 10,000, which can be programmed lower during provisioning to limit key usage.

How is the EEPROM data retention specified?

The EEPROM guarantees data retention for up to 40 years at an ambient temperature of +55°C.