The MAX6966/MAX6967 is a serial interface peripheral from Texas Instruments that provides 10 I/O ports that can be configured as either current drivers, logic outputs, or Schmitt logic inputs. It supports PWM dimming and per-LED switching control.
The MAX6966 and MAX6967 are 10‑port constant‑current LED driver and I/O expander devices that communicate via a high‑speed SPI‑compatible serial interface. Each port can be configured as a 10 mA or 20 mA constant‑current LED driver (static or PWM), an open‑drain logic output, or an over‑voltage‑protected logic input, allowing flexible LED‑lighting and GPIO applications.
The datasheet provides full electrical and timing specifications, pin descriptions, package information, and a quick‑start guide. It also covers power‑management features such as shutdown mode, standby current, and PWM intensity control, as well as mechanical dimensions for the 3 mm × 3 mm QFN and 16‑pin QSOP packages.
| Operating Supply Voltage (V+) | 2.25‑3.60 V |
|---|---|
| External Supply Voltage (PO‑P9) | 7 V |
| Standby Current (typ) | 0.7 µA |
| Operating Temperature Range | -40 °C to +125 °C |
| Package Size | 3 mm × 3 mm, 0.8 mm height QFN |
| LED Driver Current Options | 10 mA or 20 mA constant‑current |
| Internal PWM Clock Frequency | 27 kHz‑45 kHz |
| Package Pin Count | 16‑Pin QSOP or QFN |
| Shutdown Current | 0.8 µA typ, 2 µA max |
The devices operate from 2.25 V to 3.60 V supply voltage.
Each device provides ten I/O ports, labeled PO to P9.
The shutdown current is typically 0.8 µA and up to 2 µA maximum.