DS28E22P+

Specialized ICS Overview

The DS28E22P+ is a DeepCover Secure Authenticator featuring a 1-Wire interface and SHA-256 cryptographic engine. It integrates 2Kb (2048-bit) user-programmable EEPROM organized into eight 256-bit pages. The device utilizes a symmetric key-based bidirectional authentication model, generating MACs from user memory data, an on-chip secret, host challenges, and a unique factory-programmed 64-bit ROM ID. Electrical specifications include a 1-Wire pullup voltage range of 2.97V to 3.63V, active read current up to 1mA, and standby current of 5µA. It supports overdrive speeds up to 76.9kbps and operates within -40°C to +85°C.

Specialized ICS Feature Summary

• Bidirectional secure authentication using SHA-256 with dedicated hardware acceleration
• 2048-bit user EEPROM with partitioned pages and irreversible protection modes
• Unique 64-bit factory-programmed ROM ID for identification and crypto operations
• Single-contact 1-Wire interface supporting overdrive speeds up to 76.9kbps

Specialized ICS Applications

• Authentication of network-attached appliances
• Printer cartridge ID and authentication
• System intellectual property protection
• Sensor and accessory authentication with calibration data storage
• Secure feature setting for configurable systems

Specialized ICS Procurement Notes

Verify the package type matches the specific suffix; the 'P+' designation indicates a 6-pin TSOC package. Confirm RoHS compliance status via the manufacturer's documentation. Check availability as distribution may vary by region. Ensure the ordering suffix aligns with the required quantity format, such as tube or tape-and-reel options if applicable.

Specialized ICS Selection Notes

Select the DS28E22P+ when bidirectional SHA-256 authentication and nonvolatile storage are required in a single contact interface. Compare against other DeepCover models based on memory size and specific security features like ECDSA support. Verify that the 1-Wire bus timing and pullup requirements fit the system design constraints.

Specialized ICS Part Context

The DS28E22P+ belongs to the DS28E22 series of DeepCover Secure Authenticators. It is manufactured by Analog Devices Inc./Maxim Integrated. The 'P+' suffix specifically denotes the 6-pin TSOC package variant. Other variants in the family include TDFN packages and different memory configurations.

Specialized ICS Replacement Considerations

Direct replacements within the same family include the DS28E22P+T (tape and reel version). For different package types, the DS28E22Q+T offers a TDFN-EP configuration. Ensure pin compatibility and electrical characteristics match before substitution.