X9455

X9455 NOT RECOMMENDED FOR NEW DESIGNS NO RECOMMENDED REPLACEMENT contact our Technical Support Center at 1-888-INTERSIL or www.intersil.com/tsc Dual Two-wiper Digitally-Controlled (XDCP™) Potentiometer DATASHEET FN8202 Rev 1.00 July 28, 2006 The X9455 integrates 2 digitally controlled potentiometers (XDCP), each one with dual wipers, on a monolithic CMOS integrated circuit. The digitally controlled potentiometer is implemented using 255 resistive elements in a series array. Between each element are tap points connected to wiper terminals through switches. The position of each wiper on the array is controlled by the user through the U/D or 2-wire bus interface. Each potentiometer wiper has associated with it two volatile Wiper Counter Register (WCR) and each WCR has associated with it four non-volatile Data Registers 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 though the switches. The contents of the default data registers (DR0A0, DR0B0, DR1A0, DR1B0) are loaded into the WCR on power up. The DCP can be used as a four-terminal potentiometer in a wide variety of applications including the programming of bias voltages, window comparators, and three resistor programmable networks. Pinout DS0 A0 RW0B NC NC U/D Vcc RL0 RH0 RW0A A2 WP X9455 (24 LD TSSOP) TOP VIEW 1 2 3 4 5 6 X9455 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 DS1 SCL RL1 RH1 RW1A CS Vss RW1B NC NC A1 SDA Features...