Intersil X9252UV24IZ-2.7

Description
The X9252 is a monolithic CMOS integrated circuit that integrates four digitally controlled potentiometers (XDCPs). Each XDCP is implemented using 255 resistive elements in a series array, with tap points connected to wiper terminals through switches. The position of each wiper is controlled by the user through the Up/Down (U/D) or 2-wire bus interface. Each wiper has an associated volatile Wiper Counter Register (WCR) and four nonvolatile Data Registers (DRs) 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. At power-up, the device recalls the contents of the default data registers (DR00, DR10, DR20, DR30) to the corresponding WCRs.

Features
Quad solid state potentiometer
256 wiper tap points (0.4% resolution)
2-wire serial interface for write, read, and transfer operations
Up/Down interface for individual potentiometers
Wiper resistance: 400Ω typical
Nonvolatile storage of wiper positions
Power-on recall (loads saved wiper position on power-up)
Standby current: 100µA max
Maximum wiper current: 3mA
Vcc: 2.7V to 5.5V operation
2.8kΩ and 10kΩ versions of total pot resistance
Endurance: 100,000 data changes per bit per register
100-year data retention
24-lead TSSOP package (Pb-free, RoHS compliant)

Applications
Programming of bias voltages
Implementation of ladder networks
Three-resistor programmable networks