Intersil X9279UV14I

Description
The X9279 is a single digitally-controlled potentiometer (XDCP) integrated on a monolithic CMOS integrated circuit. The XDCP is implemented using 255 resistive elements in a series array, with tap points connected to the wiper terminal through switches. The wiper position on the array is controlled by the user through a 2-Wire bus interface. The potentiometer has associated with it a volatile Wiper Counter Register (WCR) and four non-volatile Data Registers that can be directly written to and read by the user. The contents of the WCR control the position of the wiper on the resistor array through the switches. Power-up recalls the contents of the default data register (DRO) to the WCR.

Features
256 Resistor Taps
2-Wire Serial Interface for Write, Read, and Transfer Operations of the Potentiometer
Wiper Resistance, 100 Typical @ 5V
16 Non-volatile Data Registers for Each Potentiometer
Non-volatile Storage of Multiple Wiper Positions
Power-on Recall. Loads Saved Wiper Position on Power-up.
Standby Current 5μA Max
Vcc: 2.7V to 5.5V Operation
50kΩ, 100kΩ Versions of End-to-End Resistance
Endurance: 100,000 Data Changes per Bit per Register
100 yr. Data Retention. 14 Ld TSSOP
Low Power CMOS
Pb-Free Available (RoHS Compliant)

Applications
Control
Parameter adjustments
Signal processing