DS28E25Q+T

Specialized ICS Overview

The DS28E25Q+T is a DeepCover Secure Authenticator integrating SHA-256 cryptographic authentication with 4Kb user EEPROM. It operates on the 1-Wire bus at up to 76.9kbps, utilizing a bidirectional challenge-response model based on FIPS 180-3 standards. The device features a unique factory-programmed 64-bit ROM ID for identification and cryptographic input. Electrical specifications include an IO pullup voltage range of 2.97V to 3.63V, standby current of 5µA (typ), and programming currents of 1mA. It supports 100k write cycles and 10-year data retention within -40°C to +85°C.

Specialized ICS Feature Summary

• Bidirectional secure authentication using SHA-256 MAC generation
• 4096-bit user EEPROM partitioned into 16 pages
• Irreversible protection modes: Authentication, Read/Write Protect, OTP/EPROM Emulation
• Hardware-accelerated SHA-256 engine with 3ms computation time

Specialized ICS Applications

• Authentication of network-attached appliances
• Printer cartridge ID and authentication
• Reference design license management
• System intellectual property protection
• Sensor and accessory authentication and calibration

Specialized ICS Procurement Notes

Verify package type TDFN-EP (6-pin) and RoHS compliance indicated by the '+' suffix. Confirm tape and reel quantity of 2500 units for the '+T' suffix. Ensure system pullup resistance and voltage align with the 2.97V–3.63V operational range. Check for exposed pad soldering requirements on the PCB ground plane.

Specialized ICS Selection Notes

Select this component for applications requiring symmetric key-based authentication without complex key management. The 4Kb EEPROM allows storage of application data alongside security settings. Consider the 1-Wire interface constraints, such as single-contact communication and pullup resistor limitations, when designing the host microcontroller interface.

Specialized ICS Part Context

The DS28E25Q+T belongs to the DS28E25 series within Analog Devices' DeepCover embedded security portfolio. It shares core cryptographic functionality with other variants like DS28E25P+T but differs in packaging. The Q suffix specifically denotes the 6-pin TDFN-EP package, distinguishing it from TSOC or TO-92 options.

Specialized ICS Replacement Considerations

Direct pin-compatible replacements within the same family include DS28E25P+T (TSOC package). Cross-family substitution requires verification of interface compatibility and memory size. No alternative part numbers are confirmed in the provided documentation.