Intersil X9271UV14

Description
The X9271 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 position of the wiper on the array is controlled by the user through the SPI bus interface. The potentiometer has associated with it a volatile Wiper Counter Register (WCR) and four nonvolatile 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
SPI Serial Interface for Write, Read, and Transfer Operations of Potentiometer
Wiper Resistance, 1000 typical at Vcc = 5V
16 Nonvolatile Data Registers
Nonvolatile Storage of Multiple Wiper Positions
Power-on Recall; Loads Saved Wiper Position on Power-up
Standby Current <3μA Max
Vcc 2.7V to 5.5V Operation
50kΩ End-to-End Resistance
100-yr Data Retention
Endurance: 100,000 Data Changes per Bit per Register
14-Lead TSSOP
Low-power CMOS
Pb-Free Plus Anneal Available (RoHS Compliant)

Applications
Control
Parameter adjustments
Signal processing