MAX3130:3V to 5.5V, IrDA Infrared Transceiver with Integrated RS-232 Interface

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 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. 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.

Key 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
MAX3130, MAX3131: Pin Configuration
MAX3130, MAX3131: Pin Configuration
Applications/Uses
  • Battery-Powered Applications
  • Cell Phones
  • Handheld Equipment
  • IrDA Applications
  • Palmtop Computers
  • PDAs and Other Handheld Devices
  • Peripherals
DataSheet
titleDownload file
MAX3130-MAX3131 Data SheetMAX3130-MAX3131.pdf
Parametrics
Part NumberFunctionsVSUPPLY
(V)
Data Rate
(kbps)
Single Ended TxSingle Ended RxShutdnµP I/FICC
(mA)
ICC (Shutdown)
(µA)
Package/PinsBudgetary
Price
maxmaxSee Notes
MAX3130IrDA/RS-232 Transceiver3.0 to 5.5115.222YesTTL/CMOS110SSOP/28$4.45 @1k
MAX3131SSOP/28$7.49 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX3130CAINo Longer AvailableMAX3130CAI+SSOP,;28 pin;81.6 mm²0°C to +70°CNo
MAX3130CAI+ActiveSSOP,;28 pin;81.6 mm²0°C to +70°CLead Free
MAX3130CAI+TNo Longer AvailableSSOP H;0°C to +70°CSee data sheet
MAX3130CAI-TNo Longer AvailableSSOP H;28 pin0°C to +70°CSee data sheet
MAX3130EAINo Longer AvailableMAX3130EAI+SSOP,;28 pin;81.6 mm²-40°C to +85°CNo
MAX3130EAI+ActiveSSOP,;28 pin;81.6 mm²-40°C to +85°CLead Free
MAX3130EAI+TActiveSSOP,;28 pin;81.6 mm²-40°C to +85°CLead Free
MAX3130EAI-TNo Longer AvailableMAX3130EAI+TSSOP H;28 pin-40°C to +85°CSee data sheet
MAX3130-MAX3131.pdf MAX3131
IrDA and RS-232: A Match Made in Silicon MAX3232E
MAX3130-MAX3131.pdf MAX3131