X9259

APPLICATION NOTES AND DEVELOPMENT SYSTEM A V A I L A B L E AN99 AN115 AN124 AN133 AN134 AN135 Single Supply / Low Power / 256-tap / 2-Wire bus X9259 Quad Digitally-Controlled (XDCPTM) Potentiometers FEATURES Quad–Four separate potentiometers 256 resistor taps/pot–0.4% resolution 2-Wire Serial Interface for write, read, and transfer operations of the potentiometer Wiper Resistance, 100Ω typical @ VCC = 5V 4 Nonvolatile Data Registers for Each Potentiometer Nonvolatile Storage of Multiple Wiper Positions Power On Recall. Loads Saved Wiper Position on Power Up. Standby Current < 5µA Max VCC: 2.7V to 5.5V Operation 50KΩ, 100KΩ versions of End to End Pot Resistance Endurance: 100,000 Data Changes per Bit per Register 100 yr. Data Retention Single Supply Version of X9258 24-Lead SOIC, 24-Lead TSSOP, 24-Lead XBGA Low Power CMOS DESCRIPTION The X9259 integrates 4 digitally controlled potentiometer (XDCP) on a monolithic CMOS integrated circuit. The digital controlled potentiometer is implemented using 255 resistive elements in a series array. Between each element are tap points connected to the wiper terminal through switches. The position of the wiper on the array is controlled by the user through the 2-Wire bus interface. Each potentiometer has associated with it a volatile Wiper Counter Register (WCR) and a four nonvolatile Data Registers that can be directly written to and read by the user. The contents of the WCR controls the position of ...