The X9252 integrates 4 digitally controlled potentiometers
(XDCP) on a monolithic CMOS integrated circuit.
The digitally controlled potentiometers are implemented
using 255 resistive elements in a series array. Between each
pair of elements are tap points connected to wiper terminals
through switches. The position of each wiper on the array is
controlled by the user through the Up/Down (U/D) or 2-wire
bus interface. The wiper of each potentiometer 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 controls
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 WCR.
Each DCP can be used as a three-terminal potentiometer or
as a two terminal variable resistor in a wide variety of
applications including the programming of bias voltages, the
implementation of ladder networks, and three resistor
programmable networks.

Features
• Quad Solid State Potentiometer
• 256 Wiper Tap Points-0.4% Resolution
• 2-Wire Serial Interface for Write, Read, and Transfer
Operations of the Potentiometer
• Up/Down Interface for Individual Potentiometers
• Wiper Resistance: 40 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
• 2.8k and 10k Version of Total Pot Resistance
• Endurance: 100,000 Data Changes per Bit per Register
• 100 yr. Data Retention
• 24 Ld TSSOP
• Pb-Free (RoHS Compliant)