Intersil X9221AWSIZT1

Description
The X9221A integrates two digitally controlled potentiometers (XDCPs) on a monolithic CMOS integrated microcircuit. The XDCP is implemented using 63 resistive elements in a series array, with tap points connected to the wiper terminal through switches. The wiper position is controlled by the user through a 2-wire bus interface. Each potentiometer has a volatile Wiper Counter Register (WCR) and two non-volatile Data Registers (DR0:DR1) that can be directly written to and read by the user. The contents of the WCR control the wiper position on the resistor array. Power up recalls the contents of DR0 to the WCR.

Features
Two XDCPs in one package
2-wire serial interface
Register-oriented format, 8 registers total
Directly write wiper position
Read wiper position
Store up to four positions per pot
Quick transfer of register contents to resistor array
Direct write cell
Endurance: 100,000 writes per bit per register
Resistor array values: 2kΩ, 10kΩ, 50kΩ
Resolution: 64 taps each pot
20 Ld plastic DIP and 20 Ld SOIC packages
Pb-free plus anneal available (RoHS compliant)

Applications
Control
Parameter adjustments
Signal processing