The X9408 is a device that integrates four digitally controlled potentiometers (XDCP). It features low noise, low power consumption, a 2-wire serial interface, and can be used in various applications.
The X9408 integrates four digitally controlled potentiometers (XDCP) on a monolithic CMOS IC. Each pot provides 64 resistor taps, a wiper resistance of about 40 Ω at 5 V, and four non‑volatile data registers. The device operates from 2.7 V to 5.5 V (V+) and –2.7 V to –5.5 V (V‑) with a standby current of less than 1 pA.
Communication is via a 2‑wire serial bus (SCL/SDA) supporting up to 16 devices on the same bus. The protocol includes start/stop conditions, acknowledge handshaking, and instruction bytes for reading and writing wiper positions and data registers. The X9408 is offered in 24‑lead SOIC, TSSOP and PDIP packages.
| Number of potentiometers | 4 |
|---|---|
| Resistor taps per potentiometer | 64 |
| Supply voltage V+ | 2.7 V to 5.5 V |
| Supply voltage V‑ | -2.7 V to -5.5 V |
| Standby current | < 1 pA max (total package) |
| Endurance | 100,000 data changes per bit per register |
| Data retention | 100 years |
| Maximum devices on bus | 16 |
| Package types | 24‑Lead SOIC, TSSOP, PDIP |
The standby current is less than 1 pA (total package).
Up to 16 devices can be connected to the same 2‑wire bus.
The device can handle 100,000 data changes per bit per register.
Data is retained for 100 years.