The X9251 is a single supply/low power/256-tap/SPI bus quad digitally-controlled potentiometer. It integrates four digitally controlled potentiometers that can be controlled by the user through the SPI bus interface. The product can be used in various applications including control, parameter adjustments, and signal processing.
The X9251 integrates four digitally‑controlled potentiometers on a single CMOS IC. Each potentiometer can be accessed via an SPI bus, with volatile wiper counter registers and non‑volatile data registers for storing positions.
The device is offered in 24‑lead SOIC and TSSOP packages, supports a supply range of 2.7 V to 5.5 V, and provides features such as 100 Ω wiper resistance, standby current below 5 µA, and 100 k data‑change endurance.
| Supply voltage | 2.7 V to 5.5 V |
|---|---|
| Wiper resistance | 100 Ω typical @ Vcc = 5 V |
| Standby current | < 5 µA max |
| Resolution | 256 taps (0.4 % resolution) |
| Endurance | 100 000 data changes per bit per register |
| Number of potentiometers | 4 |
| Package options | 24‑lead SOIC (300 mil) or 24‑lead TSSOP |
It uses an SPI serial interface for read, write, and transfer operations.
The device contains four digitally‑controlled potentiometers.
The standby current is less than 5 µA.
The wiper resistance is 100 Ω typical at a supply voltage of 5 V.