Renesas Electronics X9258
The X9258 integrates 4 digitally controlled potentiometers (XDCP™) on a monolithic CMOS integrated circuit. The digitally controlled potentiometer is implemented using 255 resistive elements in a series array. The position of the wiper on the array is controlled by the user through the 2-wire bus interface.FEATURES
● Four potentiometers in one package● 256 resistor taps/potentiometer................. 0.4% resolution
● 2-wire serial interface
● Wiper resistance, 40Ωtypical @ V+ = 5V, V- = -5V
● Four nonvolatile data registers for each potentiometer
● Nonvolatile storage of wiper position
● Standby current <5µA max (total package)
● Power supplies - VCC = 2.7V to 5.5V - V+ = 2.7V to 5.5V - V- = -2.7V to -5.5V
● 100kΩ, 50kΩtotal potentiometer resistance
● High reliability - Endurance: 100,000 data changes per bit per register - Register data retention . . . . . . . . . . . . . . . . . . 100 years
● 24 Ld SOIC, 24 Ld TSSOP
● Dual supply version of X9259
● Pb-free (RoHS compliant) Block Diagram VCC VSS V+ V- WP SCL SDA A0 A1 A2 A3 INTERFACE AND CONTROL CIRCUITRY 8 DATA R0 R1 WIPER COUNTER REGISTER R2 R3 (WCR) POT 0 VH0/RH0 VL0/RL0 VW0/RW0 R0 R1 WIPER COUNTER REGISTER R2 R3 (WCR) RESISTOR ARRAY POT 2 VH2/RH2 VL2/RL2 VW2/RW2 VW1/RW1 R0 R1 R2 R3 WIPER COUNTER REGISTER (WCR) RESISTOR ARRAY POT...