MAX3130/MAX3131

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


Application

The MAX3130 is optimized for applications using a single UART for both infrared and RS-232 communication. The infrared transmitter input and infrared receiver output are multiplexed with one RS-232 transmitter input and one RS-232 receiver output, respectively. The MAX3131's IrDA transceiver and RS-232 transceivers are separate and have their own data inputs and outputs. Both these devices require a minimum of external components: four small 0.1µFcapacitors, a photodiode, an infrared LED, and a current-setting resistor.


Pinout




Specifications

V_CC to GND..............................................................-0.3V to +6V
AV_CCto AGND...........................................................-0.3V to +6V
V_CCto AV_CC........................................................................±0.3V
AGND, PGND to GND...........................................................±0.1V
V+ to GND................................................................-0.3V to +7V
V- to GND.................................................................+0.3V to -7V
V+ to V-...............................................................................+13V
Inputs (referenced to GND)
T1IN, T2IN, TXD,
RSSD , IRMODE, BAUD16,
IRSD .........................................................................-0.3V to +6V
R1IN, R2IN...........................................................................±25V
Outputs (referenced to GND)
T1OUT, T2OUT...................................................................±13.2V
R1OUT, R2OUT, EDGEDET, RXD.........-0.3V to (VCC+ 0.3V)
LEDC.........................................................................-0.3V to +6V
Output Short-Circuit Duration (to V_CCor GND)
T1OUT, T2OUT............................................................Continuous
Output Currents
LEDC Continuous...............................................................200mA
LEDC 20% Duty Cycle t_ON< 90µs.......................................500mA
Input Current
PINC.....................................................................................10mA
Continuous Power Dissipation (T_A= +70°C)
SSOP (derate 9.52mW/°C above +70°C)..........................762mW
Operating Temperature Ranges
MAX3130/MAX3131CAI............................................0°C to +70°C
MAX3130/MAX3131EAI.........................................-40°C to +85°C
Storage Temperature Range..............................-65°C to +160°C
Lead Temperature (soldering, 10sec)...............................+300°C


Description

The MAX3130/MAX3131 combine an IrDA 1.2 compatible infrared transceiver with an RS-232 interface-all ina single 3V-powered hybrid microcircuit. The MAX3130/MAX3131 infrared  transceiver supports IrDA data rates of 2.4kbps to 115kbps. The infrared receive channel provides a high-gain/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.