| # of Devices/ Channels | 4 |
| # of Taps | 64 |
| Memory Type | Non-Volatile |
| Bus Interface Type | 2-Wire |
| Resistance Options (kΩ) | 2.5, 10 |
| VCC Range (V) | 2.7 to 5.5 |
| VCC (min) (V) | 2.7 |
| VCC (max) (V) | 5.5 |
| DCP Dual Supply Range (V) | N/A |
| DCP Single Supply Range (V) | 0 to 5.5 |
| Resistance Taper | Linear |
| Wiper Current (mA) | 3 |
| Wiper Resistance (Ω) | 50 |
| Supply Current (μA) | 1 |
| Max Operating Temp (°C) | 85 |
| End-to-End Tempco (ppm/°C) | 300 |
| Middlepoint Ratiometric Tempco | 20 |
| VL min. terminal voltage (V) | 0 |
| VH max. terminal voltage (V) | 5.5 |
The X9409 integrates 4 digitally controlled potentiometers (xDCP) on a monolithic CMOS integrated microcircuit.
The digitally controlled potentiometer is implemented using 63 resistive elements in a series array. Between each element are tap points connected to the wiper terminal through switches. The position of the wiper on the array is controlled by the user through the 2-wire bus interface. Each potentiometer has associated with it a volatile Wiper Counter Register (WCR) and 4 nonvolatile Data Registers (DR0:DR3) that can be directly written to and read by the user. The contents of the WCR controls the position of the wiper on the resistor array through the switches. Power-up recalls the contents of DR0 to the WCR.
The xDCP can be used as a three-terminal potentiometer or as a two-terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing.