The MAX3120 is an IrDA 1.2-compatible infrared transceiver optimized for battery-powered, space-constrained applications. It supports data rates up to 115kbps over a wide 3V to 5.5V operating range, while consuming only 120µA of current. The transceiver features a 10nA shutdown mode to extend battery life. With minimal external components required (photodiode, infrared LED, and current-setting resistor), the MAX3120 reduces the space needed for IrDA applications. The optical components are external, allowing for maximum flexibility in PC board design. The MAX3120 is available in 8-pin µMAX and SO packages, with the µMAX package occupying half the board space of an 8-pin SO package.
The MAX3120 infrared transceiver is designed for battery‑powered, space‑constrained applications. It operates from 3 V to 5.5 V, consumes only 120 µA typical supply current, and supports IrDA 1.2 data rates from 2.4 kbps up to 115.2 kbps. The device includes a high‑current LED driver capable of 200 mA and a 10 nA shutdown mode for extended battery life.
The transceiver is offered in 8‑pin µMAX and SO packages and requires only a photodiode, an IR LED, and a current‑setting resistor. Detailed pin descriptions, absolute maximum ratings, and layout guidelines are provided to aid designers in implementing reliable IR communication links.
| Typical Supply Current | 120 µA |
|---|---|
| Shutdown Supply Current | 10 nA |
| LED Driver Maximum Current | 200 mA |
| Supported Data Rates | 2.4 kbps to 115.2 kbps |
| Operating Temperature Range | -40 °C to +85 °C |
| Package Types | 8‑pin µMAX and SO |
The MAX3120 typically draws 120 µA of supply current.
The device can drive up to 200 mA through its LED driver.
It supports data rates from 2.4 kbps to 115.2 kbps.