The MCP4021/2/3/4 are Microchip's non-volatile, 6-bit digital potentiometers that can be configured as either a potentiometer or rheostat.
The MCP4021/2/3/4 family are low‑cost, non‑volatile 6‑bit digital potentiometers that can be configured as either a potentiometer or a rheostat. They use a simple Up/Down serial interface and incorporate Microchip's WiperLock technology to store calibration settings in EEPROM without a separate write‑protect pin.
Key specifications include a wide operating voltage range of 2.7 V to 5.5 V, 64 taps (63 resistors), high‑voltage tolerant digital inputs up to 12.5 V, and low‑power static current of 1 pA. The devices are offered in SOT‑23‑6, SOIC, MSOP, and DFN packages and are suitable for power‑supply trimming, calibration, and mechanical potentiometer replacement applications.
| Number of taps | 64 (63 resistors) |
|---|---|
| Operating voltage range | 2.7 V to 5.5 V |
| Temperature range | -40 °C to +125 °C |
| EEPROM endurance | 1 M cycles |
| High‑voltage tolerant digital input voltage | Up to 12.5 V |
| Static current (max) | 1 pA |
The devices operate from 2.7 V up to 5.5 V.
Each part provides 64 taps, which correspond to 63 resistors.
The EEPROM can endure up to 1 million write cycles.
The high‑voltage tolerant digital inputs can handle up to 12.5 V.