X9258 Datasheet - Renesas

X9258 Quad Digitally Potentiometers

Host Interface Pins SERIAL CLOCK (SCL) The SCL input is used to clock data into and out of the X9258. SERIAL DATA (SDA) SDA is a bidirectional pin used to transfer data into and out of the device. It is an open drain output and may be wire-ORed with any number of open drain or open collector output.

DATASHEET X9258 Low Noise/Low Power/2-Wire Bus/256 Taps Quad Digital Controlled Potentiometers (XDCP™) FN8168 Rev 6.00 December 15, 2011 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. 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.

X9258 Features

* Four potentiometers in one package

* 256 resistor taps/potentiometer 0.4% resolution

* 2-wire serial interface

* Wiper resistance, 40Ωtypical @ V+ = 5V, V- = -5V

* Four nonvolatile data registers for each potentiometer

* Nonvolatile storage of wiper

X9258-Renesas.pdf