The X9279 is a single supply/low power/256-tap/2-wire bus single digitally controlled potentiometer. It features 256 resistor taps and a 2-wire serial interface for write, read, and transfer operations. The device has nonvolatile storage of multiple wiper positions for each potentiometer, power-on recall, low standby current, and high data retention capability.
The Intersil X9279 integrates a single digitally controlled potentiometer (XDCP) on a monolithic CMOS integrated circuit. It is implemented using 255 resistive elements in a series array, with tap points connected to the wiper terminal through switches. The position of the wiper is controlled by the user through a 2-Wire bus interface.
| Resistor Taps | 256 |
|---|---|
| Interface Type | 2-Wire Serial Interface |
| Wiper Resistance (Typical) | 100Ω @ 5V |
| Nonvolatile Data Registers | 16 per Potentiometer |
| Supply Voltage Range | 2.7V to 5.5V |
| End-to-End Resistance Versions | 50kΩ and 100kΩ |
| Data Retention | 100 yr. |
| Package Type | 14 Ld TSSOP |
The typical wiper resistance is 100Ω.
The device features 256 resistor taps.
The device operates with a supply voltage between 2.7V and 5.5V.