DATASHEET
X9259 FN8169
Rev 6.00
December 12, 2014 Single Supply/Low Power/256-Tap/2-Wire Bus Quad Digitally-Controlled
(XDCPв„ў) Potentiometers Features The X9259 integrates four digitally controlled potentiometers
(XDCP) on a monolithic CMOS integrated circuit. Four separate potentiometers in one package The digitally controlled potentiometers are implemented with
a combination of resistor elements and CMOS switches. The
position of the wipers are controlled by the user through the
2-wire bus interface. Each 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 content of the WCR controls the position of the wiper.
At power-up, the device recalls the content of the default Data
Registers of each DCP (DR00, DR10, DR20, and DR30) to the
corresponding WCR. 256 resistor taps–0.4% resolution 2-wire serial interface for write, read, and
transfer operations of the potentiometer Wiper resistance: 100О© typical at VCC = 5V 4 nonvolatile data registers for each potentiometer Nonvolatile storage of multiple wiper positions Standby current <5ВµA max VCC: 2.7V to 5.5V operation The XDCP can be used as a three-terminal potentiometer or as
a two-terminal variable resistor in a wide variety of
applications including control, parameter adjustments, and
signal processing. 50kО© version of total resistance Endurance: 100,000 data changes per bit per register 100 year data retention Single supply version of X9258 24 Ld SOIC, 24 Ld TSSOP Low power CMOS Pb-Free (RoHS compliant) Functional Diagram A3
A2 2-WIRE
INTERFACE A1
A0 RH1 RH0 VCC WCR0
DR00 …
