MAX3120

19-1390; Rev 0; 10/98 Low-Profile, 3V, 120µA, IrDA Infrared Transceiver General Description The MAX3120 IrDA 1.2-compatible infrared transceiver is optimized for battery-powered, space-constrained applications. It consumes only 120µA while supporting data rates up to 115kbps over a wide 3V to 5.5V operating range, and features a 10nA shutdown mode to further extend battery life. The MAX3120 reduces the space required for IrDA applications by requiring a minimum of external components: photodiode, infrared LED, and current-setting resistor. Optical components are external to allow maximum flexibility in PC board design. The MAX3120 is available in 8-pin µMAX and SO packages. The µMAX package consumes half the board space of an 8-pin SO. Features o IrDA 1.2 Compatible: 2.4kbps to 115.2kbps o +3V to +5.5V Single-Supply Operation o Flexible Optics Selection and Layout o 120µA Supply Current o 10nA Shutdown Supply Current o 200mA, High-Current Infrared LED Drive MAX3120 Ordering Information PART MAX3120CUA MAX3120CSA MAX3120EUA MAX3120ESA TEMP. RANGE 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 8 µMAX 8 SO 8 µMAX 8 SO Applications IrDA Applications Personal Digital Assistants (PDAs) Palmtop Computers Cell Phones Hand-Held Equipment Peripherals Typical Operating Circuit +3.3V Pin Configuration TOP VIEW CS SCLK DIN DOUT VCC VCC SHDN LED TX TXD LEDC MAX3100 RX MAX3120 RXD PINC TXD VCC GND PINC 1 2 3 4 8 RXD LEDC PGND SHDN GND GND PGND PIN DI...