DS28E40ATB/VY+T

Specialized ICS Overview

The DS28E40ATB/VY+T is a secure authenticator featuring integrated asymmetric (ECC-P256) and symmetric (SHA-256) cryptographic engines. It includes a FIPS/NIST True Random Number Generator, 6Kb of One-Time Programmable memory, one configurable GPIO, and a unique 64-bit ROM ID. The device communicates via a single-contact 1-Wire interface at standard (9.09kbps) or overdrive (62.5kbps) speeds. Operating parameters include a 3.3V ±10% supply voltage and an industrial temperature range of -40°C to +125°C.

Specialized ICS Feature Summary

• Hardware-implemented ECC-P256 compute engine supporting FIPS 186 compliant ECDSA signature generation/verification and ECDH key exchange.
• SHA-256 compute engine providing FIPS 198 HMAC capabilities for bidirectional authentication.
• Integrated NIST SP 800-90B compliant TRNG with function to read out entropy.
• 6Kb OTP memory partitioned into 3Kb user data and 3Kb keys/secrets storage.

Specialized ICS Applications

• Automotive secure authentication
• Identification and calibration of automotive parts, tools, and 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 package variant against the datasheet ordering information. The 'ATB' suffix corresponds to the 10-pin TDFN package code T1034+2, which measures 4mm x 3mm. Confirm that this physical dimension matches the design requirements, as the alternative 'VY' package option utilizes a 3mm x 3mm side-wettable footprint.

Specialized ICS Selection Notes

Select this component when AEC-Q100 Grade 1 qualification is required for automotive environments. Ensure the host controller supports the 1-Wire protocol with open-drain outputs. Verify that the application can accommodate the maximum write memory time of 150ms and ECC key pair generation time of 500ms during initialization sequences.

Specialized ICS Part Context

This part belongs to the Maxim Integrated DeepCover family of embedded security solutions. It is designed to protect sensitive data using multiple layers of security, including active die shields and encrypted storage. The device provides robust countermeasures against both invasive and non-invasive physical attacks.

Specialized ICS Replacement Considerations

The DS28E40G/V+T is a direct functional equivalent within the same product line. The primary distinction lies in the package type: the G/V variant uses the 4mm x 3mm TDFN package, whereas the ATB variant also utilizes the 4mm x 3mm TDFN package. Verify pinout compatibility if substituting with other DeepCover authenticators.