DS28E38Q+U

Specialized ICS Overview

The DS28E38Q+U is a DeepCover Secure ECDSA Authenticator integrating Analog Devices’ patented ChipDNA™ Physically Unclonable Function (PUF) technology. It provides cryptographic protection against invasive physical attacks by leveraging random semiconductor variations to generate unique, repeatable output values. The device features an ECC-P256 hardware engine for FIPS 186-compliant signature generation, a FIPS/NIST-compliant True Random Number Generator (TRNG), and 2Kb of secured EEPROM. It communicates via a single-contact 1-Wire® bus at standard (12.5kbps) and overdrive (90.9kbps) speeds. Operating parameters include a supply voltage range of 2.97V to 3.63V and an operating temperature range of -40°C to +85°C.

Specialized ICS Feature Summary

• Patented ChipDNA PUF technology secures device data and optionally serves as the ECC private key.
• Integrated ECC-P256 hardware engine supports FIPS 186-compliant ECDSA signature generation.
• Includes a FIPS/NIST-compliant TRNG and 2Kb of secured EEPROM for user data and certificates.
• Features a 17-bit decrement-only counter and a unique factory-programmed 64-bit ROM ID.

Specialized ICS Applications

• Authentication of Medical Sensors and Tools
• Secure Management of Limited Use Consumables
• IoT Node Authentication
• Peripheral Authentication
• Printer Cartridge Identification and Authentication

Specialized ICS Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or direct manufacturer channels. Confirm RoHS compliance status using official documentation, as ordering suffixes may indicate environmental compliance variations without altering functional specifications. Ensure proper handling procedures are followed during storage and installation to maintain device integrity.

Specialized ICS Selection Notes

Select the DS28E38Q+U when robust protection against invasive physical attacks is required for peripheral authentication. The TDFN-EP package is suitable for surface-mount applications requiring a 3mm x 3mm footprint. Ensure the host system supports 1-Wire communication protocols and provides adequate pull-up resistance (max 1kΩ) and external capacitance if parasite power mode is utilized.

Specialized ICS Part Context

The DS28E38 belongs to the DeepCover Secure Authenticator family from Analog Devices/Maxim Integrated. It is designed to secure embedded systems by providing hardware-based cryptographic functions. The Q+ suffix typically denotes commercial temperature grade and RoHS compliance within this product line.

Specialized ICS Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate other members of the DS28E3x series or DS28ELx series based on specific memory size and cryptographic requirements, ensuring interface compatibility and package suitability.

Specialized ICS FAQ

How does the ChipDNA PUF protect against invasive attacks?

ChipDNA utilizes random variations in semiconductor device characteristics that occur during wafer fabrication. Attempts to probe or observe the circuit modify these characteristics, preventing the discovery of the unique value used for cryptographic functions.

What are the supported communication speeds for the 1-Wire interface?

The DS28E38 supports standard speed (maximum 12.5kbps) and overdrive speed (maximum 90.9kbps). The device defaults to standard speed unless explicitly set to overdrive mode.

Can the ChipDNA output be used as the private key?

Yes, under user control, the ChipDNA output can optionally be used as the private key for the ECC-P256 signing operation, in addition to securing all device-stored data.