DS28E40ATB/VY+

Specialized ICS Overview

The DS28E40ATB/VY+ is a secure authenticator featuring ECC-P256 and SHA-256 cryptographic engines, a FIPS/NIST TRNG, 6Kb OTP memory, and a configurable GPIO. It operates on a single-contact 1-Wire interface at 9.09kbps or 62.5kbps with a 3.3V ±10% supply. The device supports ECDSA signature generation/verification, ECDH key exchange, and HMAC functions. It includes a unique 64-bit ROM ID and offers ±8kV HBM ESD protection. Operating range is -40°C to +125°C in a 10-pin TDFN package.

Specialized ICS Feature Summary

• ECC-P256 Compute Engine for FIPS 186 compliant ECDSA and ECDH operations
• SHA-256 Compute Engine supporting FIPS 198 HMAC for bidirectional authentication
• Integrated FIPS/NIST True Random Number Generator (TRNG)
• 6Kb One-Time Programmable (OTP) memory for keys and certificates
• Configurable GPIO pin with optional ECDSA/SHA-256 authenticated control

Specialized ICS Applications

• Automotive Secure Authentication
• Identification and Calibration of Automotive Parts/Tools/Accessories
• IoT Node Crypto-Protection
• Accessory and Peripheral Secure Authentication
• Secure Boot or Download of Firmware and System Parameters

Specialized ICS Procurement Notes

Verify the specific ordering suffix 'ATB/VY+' against the manufacturer's official documentation to confirm the exact package variant (3mm x 3mm Side-Wettable TDFN). Ensure compatibility with system requirements for the 1-Wire pullup voltage and resistance values specified in the electrical characteristics table.

Specialized ICS Selection Notes

Select this component when asymmetric and symmetric cryptographic security is required on a 1-Wire bus. It is suitable for applications needing hardware-implemented ECC-P256 and SHA-256 capabilities within an automotive temperature range (-40°C to +125°C). Consider the 6Kb OTP capacity for storing user data, keys, and certificates alongside the unique 64-bit ROM ID.

Specialized ICS Part Context

The DS28E40 belongs to the DeepCover family of secure authenticators designed for high-security environments. It integrates multiple layers of security countermeasures, including active die shielding and encrypted storage, to protect against invasive and non-invasive attacks. The ATB/VY+ designation indicates a specific package configuration within this automotive-grade series.

Specialized ICS Replacement Considerations

Direct replacements must support the same 1-Wire interface, ECC-P256/SHA-256 cryptographic functions, and 3.3V operating voltage. Verify that any substitute part matches the 10-pin TDFN package dimensions and thermal characteristics if space constraints are critical.