ICs Integrate IR Transceiver And RS-232 Interface

Valuable board space is saved when using the MAX3130/3131 transceivers, which integrate an infrared transceiver, IR encoder/decoder, charge pump, and RS-232 interface into a single, surface-mount package. The IR transceiver is IrDA 1.2-compatible, supporting data rates of 2.4 kbps to 115 kbps. The RS-232 interface includes two drivers and two receivers that support data rates up to 120 kbps. Both devices consume 370 µA in normal operation and only 1 µA while in shutdown. Their low dropout transmitters and proprietary, high-efficiency, dual-charge pump power supply combine to deliver true RS-232 and IrDA performance from a single supply voltage of 3V to 5.5V. MAX3130 is optimized for applications using one UART for both IR and RS-232 communications,while MAX3131's IR and RS-232 transceivers have separate data lines for the input and output. The integrated IrDA and RS-232 transceivers are available in a 28-pin SSOP package.