CAT5140 single channel non-volatile 256−tap digitally programmable potentiometer

CAT5140 circuit designed by ON Semiconductor single channel 256−tap digitally programmable potentiometer DPP is comprised of series of equal value resistor elements connected between two externally accessible end points.
The CAT5140 contains a volatile wiper register (WR) and an 8−bit non−volatile EEPROM for wiper position and 5 additional non−volatile registers for general purpose data storage. Programming of the registers is controlled via I2C interface. On power up, the wiper position is reset to the most recent value stored in the non−volatile memory register (IVR).
Main features of CAT5140 are : 400 kHz I2C Compatible Interface , 256 Position Linear Taper Potentiometer , End−to−End Resistance = 50 k_ / 100 k , TCR = 100 ppm/°C (typical) , Standby Current = 2 _A (max) , Typical Wiper Resistance = 70 _ @ 3.3 V , Operating Voltage = 2.5 V to 5.5 V , 6 Registers 8−bit Non−volatile EEPROM , 2,000,000 Data Write Stores , 100 Year Data Retention