X9455 is a digitally controlled dual two-wiper potentiometer produced by Intersil. It is implemented using a series array of 255 resistive elements. There are two switches connected to each resistor. The position of the switch controls the resistance of the potentiometer.
The X9455 integrates two digitally‑controlled potentiometers (XDCP) with dual wipers on a monolithic CMOS IC. It offers 256 tap points, 0.4 % resolution, non‑volatile wiper storage, and a 2‑wire serial interface for read/write operations.
The datasheet details ordering information, pinout, absolute maximum ratings, analog and DC electrical specifications, 2‑wire interface timing, test circuits, and package dimensions for the 24‑lead TSSOP version.
| Supply voltage (Voc) range | 2.7 V to 5.5 V |
|---|---|
| Standby current | < 20 µA |
| Maximum wiper current | 3 mA |
| Resolution | 0.4 % |
| Endurance (data changes per bit) | 100 000 |
| Data retention | 100 years |
| Package | 24‑lead TSSOP (4.4 mm) |
The X9455 operates from 2.7 V up to 5.5 V.
It provides 256 resistor tap points, giving a 0.4 % resolution.
A maximum of eight X9455 devices may occupy the 2‑wire serial bus.
The standby current is less than 20 µA.