The X9401 is a low noise, low power, SPI bus quad, 64 tap, digitally controlled potentiometer (XDCP™).
The X9401 is a highly integrated microcircuit that incorporates four digitally controlled potentiometers (XDCP) on a single CMOS die. Each potentiometer provides 64 taps and is accessed via a standard SPI serial interface, allowing the wiper position to be set and stored in non‑volatile memory.
Key features include non‑volatile storage of wiper position, four 6‑bit data registers per pot, 16 bytes of EEPROM, low standby current (< 1 pA), operating current < 400 µA, and a 24‑lead SOIC package. The device supports both three‑terminal potentiometer and two‑terminal variable resistor configurations for a wide range of control and signal‑processing applications.
| Number of potentiometers | 4 |
|---|---|
| Taps per potentiometer | 64 |
| Non‑volatile storage | Wiper position and 4 data registers per pot |
| EEPROM memory | 16 bytes |
| Serial interface | SPI |
| Total resistance (Rtotal) | 10 kΩ |
| Wiper resistance | 150 Ω typical |
| Standby current | < 1 pA |
| Operating current | < 400 µA max |
| Supply voltage (Voc) | 2.7 V to 5 V |
| Package | 24‑lead SOIC |
| Data retention | 100 years |
| RoHS compliance | Pb‑free plus anneal available |
The X9401 integrates four digitally controlled potentiometers.
The device operates from 2.7 V to 5 V.
The standby current is less than 1 pA for the total package.
The SO pin is the push/pull serial data output pin.