DS28E22Q+T

Specialized ICS Overview

The DS28E22Q+T is a DeepCover Secure Authenticator featuring a single-contact 1-Wire interface and SHA-256 cryptographic capabilities. It integrates 2048 bits of user-programmable EEPROM organized into eight 256-bit pages, alongside protected memory for secrets and settings. The device utilizes a unique factory-programmed 64-bit ROM ID as a node address and cryptographic input. Operating at overdrive speeds up to 76.9kbps with a pullup voltage range of 2.97V to 3.63V, it supports bidirectional authentication. Key electrical parameters include a typical standby current of 5µA, ±8kV HBM ESD protection, and an operating temperature range from -40°C to +85°C.

Specialized ICS Feature Summary

• Symmetric key-based bidirectional secure authentication model based on SHA-256
• Dedicated hardware-accelerated SHA engine generating MACs in approximately 3ms
• 2048-bit user EEPROM partitioned into 8 pages with irreversible protection modes
• Unique factory-programmed 64-bit identification number (ROM ID)

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 the package type matches the required footprint; the 'Q' suffix indicates a 6-pin TDFN-EP package supplied in tape and reel format. Confirm that the system design accommodates the exposed pad soldering requirements for proper thermal and electrical grounding. Ensure the host controller supports the 1-Wire protocol at overdrive speeds.

Specialized ICS Selection Notes

Select this component when bidirectional authentication using SHA-256 is required alongside nonvolatile data storage. The DS28E22Q+T is suitable for applications needing a compact 6-pin TDFN form factor. Compare against the DS28E22P+T if a TSOC package is preferred instead of TDFN. Ensure the application environment stays within the specified -40°C to +85°C temperature range.

Specialized ICS Part Context

The DS28E22Q+T belongs to the DS28E22 series of DeepCover embedded security solutions. It shares core cryptographic and memory specifications with other variants like the DS28E22P+T, differing primarily in the physical package style. This series provides robust physical security layers for sensitive key storage and secure challenge-and-response operations.

Specialized ICS Replacement Considerations

The DS28E22P+T serves as a direct functional alternative with identical specifications but utilizes a 6-pin TSOC package instead of the TDFN-EP. Verify PCB land pattern compatibility before substitution.