DS28EL22Q+T

Specialized ICS Overview

The DS28EL22Q+T is a DeepCover Secure Authenticator integrating SHA-256 cryptographic capabilities with 2Kb of user EEPROM. It operates on the 1-Wire bus at overdrive speeds up to 76.9kbps within a voltage range of 1.71V to 1.89V. The device features a unique factory-programmed 64-bit ROM ID and supports bidirectional authentication using symmetric keys. Electrical characteristics include a typical standby current of 5µA, 100k write-cycle endurance, and data retention exceeding 10 years. It is housed in a compact 6-pin TDFN package with an exposed pad.

Specialized ICS Feature Summary

• SHA-256 based bidirectional secure authentication model
• 2Kb (2048 bits) user EEPROM partitioned into 8 pages
• Unique 64-bit factory-programmed identification number
• Single-contact 1-Wire interface supporting up to 76.9kbps

Specialized ICS Applications

• Authentication of network-attached appliances
• Printer cartridge ID and authentication
• Sensor and accessory authentication with calibration
• Secure feature setting for configurable systems
• Key generation and exchange for cryptographic systems

Specialized ICS Procurement Notes

Verify the component matches the DS28EL22Q+T designation, ensuring the 'Q' indicates the industrial temperature range (-40°C to +85°C) and '+T' confirms the tape-and-reel packaging format. Confirm RoHS compliance status as indicated by the suffix. Cross-reference the manufacturer's ordering information to ensure availability and correct lot traceability before finalizing procurement.

Specialized ICS Selection Notes

Select this component when high-security bidirectional authentication is required alongside non-volatile data storage. The 1-Wire interface simplifies wiring but requires appropriate pull-up resistance (300Ω to 750Ω). Ensure the host system supports the 1.8V ±5% operating voltage and overdrive communication speeds. Verify that the 6-TDFN package footprint aligns with the PCB design constraints.

Specialized ICS Part Context

This part belongs to the Maxim Integrated DeepCover family of embedded security solutions. It combines physical security layers with cryptographic functions to protect sensitive data. The DS28EL22 series specifically targets applications requiring secure key storage and authenticated access control via the 1-Wire protocol.

Specialized ICS Replacement Considerations

Consult the official datasheet for recommended products or related parts. No specific substitute part numbers are confirmed in the provided documentation.