Hot-selling and scarce DS1855E-050+ Dual Nonvolatile Digital Potentiometer and Secure Memory IC TSSOP14 spot stock

Product Descriptions

The DS1855 dual nonvolatile (NV) digital potentiometer and secure memory consists of one 100-position linear taper potentiometer, one 256-position linear taper potentiometer, 256 bytes of EEPROM memory, and a 2-wire interface. The DS1855, which features a new software write protect, is an upgrade of the DS1845. The DS1855 provides an ideal method for setting bias voltages and currents in control applications using a minimum of circuitry. The EEPROM memory allows a user to store configuration or calibration data for a specific system or device as well as provide control of the potentiometer wiper settings. Any type of user information may reside in the first 248 bytes of this memory. The next two addresses of EEPROM memory are for potentiometer settings and the remaining 6 bytes of memory are reserved. These reserved and potentiometer registers should not be used for data storage. Access to this EEPROM is via an industry-standard 2-wire bus. The interface I/O pins consist of SDA and SCL. The wiper position of the DS1855, as well as EEPROM data, can be write-protected through hardware using the write-protect input pin (WP) or software using the 2-wire interface.

Product Features

 Two linear taper potentiometers 

 DS1855-010 (one 10k, 100 position and one 10k, 256 position) 

 DS1855-020 (one 10k, 100 position and one 20k, 256 position) 

 DS1855-050 (one 10k, 100 position and one 50k, 256 position) 

 DS1855-100 (one 10k, 100 position and one 100k, 256 position) 

 256 bytes of EEPROM memory 

 Access to data and potentiometer control via a 2-wire interface 

 External write-protect pin to protect data and potentiometer settings 

 Data and potentiometer settings also can be write-protected through software control 

 Nonvolatile wiper storage 

 Operates from 3V or 5V supplies 

​ Packaging: 14-pin TSSOP, 16-ball STPBGA, flip-chip package 

 Industrial operating temperature: -40ºC to +85ºC 

 Programming temperature: 0ºC to +85ºC

Product Specification

Product Photos

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