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Part Number: MAX3131
Description: The MAX3130/MAX3131 combine an IrDA 1.2 compatible infrared transceiver with an RS-232 interface-all i...
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MAX3131
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General Description
MAX3131 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.
A 2-driver/2-receiver RS-232 transceiver supports data rates up to 120kbps. A proprietary, high-efficiency, dual charge-pump power supply and a low-dropout transmitter combine to deliver true RS-232 performance from a single +3.0V to +5.5V supply. Selectable shutdown for IR and RS-232 circuitry reduces supply current to 1µA.
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 0.1µF capacitors, a photodiode, an infrared LED, and a current-setting resistor.
MAX3131 Maximum Ratings
VCC to GND..............................................................-0.3V to +6V
AVCC to AGND ........................................................-0.3V to +6V
VCC to AVCC .....................................................................±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 VCC or GND)
T1OUT, T2OUT.........................................................Continuous
Output Currents
LEDC Continuous ..........................................................200mA
LEDC 20% Duty Cycle tON < 90µs.................................500mA
Input Current
PINC ...............................................................................10mA
Continuous Power Dissipation (TA = +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
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
AVCC to AGND ........................................................-0.3V to +6V
VCC to AVCC .....................................................................±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 VCC or GND)
T1OUT, T2OUT.........................................................Continuous
Output Currents
LEDC Continuous ..........................................................200mA
LEDC 20% Duty Cycle tON < 90µs.................................500mA
Input Current
PINC ...............................................................................10mA
Continuous Power Dissipation (TA = +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
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
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
· 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
MAX3131 Typical Application
·Personal Digital Assistants (PDAs)
·Palmtop Computers
·Battery-Powered Systems
·Hand-Held Equipment
·Peripherals
·IrDA Applications
·Cellular Phones
·Palmtop Computers
·Battery-Powered Systems
·Hand-Held Equipment
·Peripherals
·IrDA Applications
·Cellular Phones
MAX3131 Connection Diagram
MAX3131
PDF/DataSheet Download
- Datasheet: MAX3131
- File Size: 225310 KB
- Manufacturer: Maixm
- Click here to Download
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MAX3130/MAX3131
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/MAX3131infrared transceiver supports IrDA data rates of 2.4kbps to 115kbps. The infrared receive chann...
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