General Description
The MAX3130/MAX3131 combine an IrDA 1.2 compatible infrared transceiver with an RS-232 interface—all in a single 3V-powered hybrid microcircuit. The infrared transceiver supports IrDA data rates of 2.4kbps to 115kbps. The infrared receive channel provides a highgain/low-noise PIN-diode amplifier with 100µA of ambient photodiode current rejection at a +3V supply. A high-power LED driver capable of sinking 200mA is included in the infrared transmit path. The on-board encoder/decoder (ENDEC) compresses/stretches signals to and from the external UART, allowing IrDA communication even with non-IrDA UARTs.

Features
♦ Integrated RS-232 and IrDA in Single 28-Pin SSOP Package
♦ 370µA Supply Current
♦ IrDA 1.2 Compatible: 2.4kbps to 115kbps Data Rate
♦ On-Board IR Encoder/Decoder Allows Use of Non-IrDA UARTs
♦ +3.0V to +5.5V Single-Supply Operation
♦ Meet EIA/TIA-232 Specifications Down to +3V
♦ 200mA, High-Current Infrared LED Drive
♦ 1µA Low-Power Shutdown with RS-232 Receivers Active

Applications
    Personal Digital Assistants (PDAs)
    Palmtop Computers
    Battery-Powered Systems
    Hand-Held Equipment
    Peripherals
    IrDA Applications
    Cellular Phones