The Intersil ISL90727 and ISL90728 are digitally controlled potentiometers (XDCP™). Each device consists of a resistor array, wiper switches, and a control section. The wiper position is controlled by an I2 C Bus™.
The potentiometer is implemented by a resistor array composed of 127 resistive elements and a wiper switching network. Between each element and at either end are tap points accessible to the wiper terminal. The position of the wiper element is controlled by the SDA and SCL inputs.

Volatile Solid-State Potentiometer
I2C Serial Bus Interface
DCP Terminal Voltage, 2.7V to 5.5V
Low Tempco
Rheostat - 45 ppm/°C Typical
Divider - 15 ppm/°C Typical
128 Wiper Tap Points
Wiper Resistance 70Ω Typ at VCC = 3.3V
Low Power CMOS
Active Current, 200μA Max
Standby Current, 500nA Max
Available RTOTAL Values = 50kΩ, 10kΩ
Power-on Preset to Midscale
Packaging
6 Ld SC-70
Pb-Free