The X9408 is a low noise, low power, 2-wire bus quad digitally controlled potentiometer with 40 ohm typical resistance, four non-volatile data registers, 2.7V to 5.5V operation, 10k ohm, 2.5k ohm end to end resistances, 100,000 data changes per bit per register, 100 years data retention, and three packages: 24 pin SOIC, TSSOP, and PDIP.
The X9408 is a highly integrated CMOS IC that contains four digitally controlled potentiometers, each with 64 resistor taps and a 2‑wire serial interface. It offers low standby current, wide supply ranges, and non‑volatile storage for wiper positions.
The datasheet includes features, ordering information, pin descriptions, principles of operation, instruction sets, packaging details, and mechanical dimensions for the SOIC, TSSOP, and PDIP variants.
| Number of potentiometers | 4 |
|---|---|
| Resistor taps per potentiometer | 64 |
| Serial interface | 2‑wire (SCL, SDA) |
| Standby current (total package) | < 1 pA |
| Operating voltage (Voc) | 2.7 V to 5.5 V |
| Analog supply V+ | 2.7 V to 5.5 V |
| Analog supply V‑ | -2.7 V to -5.5 V |
| Endurance (data changes per bit) | 100,000 |
| Data retention | 100 years |
The X9408 integrates four potentiometers in one package.
It uses a 2‑wire serial interface (SCL and SDA).
The standby current is less than 1 pA (total package).
The device operates from 2.7 V to 5.5 V (Voc) and supports V+ 2.7 V‑5.5 V and V‑ –2.7 V‑‑5.5 V.