DS28E40G/V+

Specialized ICS Overview

The DS28E40G/V+ is a secure authenticator designed for automotive applications, integrating asymmetric (ECC-P256) and symmetric (SHA-256) cryptographic engines. It features a FIPS/NIST True Random Number Generator (TRNG), 6Kb of One-Time Programmable (OTP) memory for keys and certificates, one configurable GPIO pin, 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 on a 3.3V ±10% supply, it supports an extended temperature range from -40°C to +125°C and is housed in a 10-pin TDFN package.

Specialized ICS Feature Summary

• ECC-P256 Compute Engine supporting FIPS 186 ECDSA signature generation/verification and ECDH key exchange
• SHA-256 Compute Engine compliant with FIPS 180 for HMAC functions and encrypted memory access
• Integrated TRNG with NIST SP 800-90B compliant entropy source
• 6Kb OTP memory partitioned into 3Kb user data and 3Kb keys/secrets

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 suffix 'G/V+' against the manufacturer's ordering guide to confirm the exact package variant (e.g., 3mm x 3mm vs. 4mm x 3mm TDFN) and tape/reel quantity. Ensure compatibility with the host system's 1-Wire pull-up requirements and voltage levels before procurement.

Specialized ICS Selection Notes

Select this component when high-grade automotive security (AEC-Q100 Grade 1) and ECC-P256 capabilities are required. Consider the 1-Wire interface constraints, such as pull-up resistance limits and recovery times, for network design. Evaluate the OTP capacity needs against the available 6Kb split between user data and cryptographic keys.

Specialized ICS Part Context

The DS28E40 belongs to Maxim Integrated's DeepCover family of embedded security solutions. It is specifically engineered for the automotive sector, offering robust protection against invasive and non-invasive attacks through active die shields and encrypted storage. The G/V+ designation indicates a specific package configuration within the broader DS28E40 product line.

Specialized ICS Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material. When evaluating alternatives, ensure the replacement supports ECC-P256, SHA-256, and 1-Wire communication protocols while meeting AEC-Q100 Grade 1 reliability standards.