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

Product Details

Key Features

Parametric specs for Appletalk and IrDA
Functions IrDA/RS-232 Transceiver
VSUPPLY (V) 3.0 to 5.5
Data Rate (kbps) (max) 115.2
# Single Ended Tx 2
Single Ended Rx 2
Shutdn Yes
µP I/F TTL/CMOS
ICC (mA) (max) 1
ICC (Shutdown) (µA) 10
Package/Pins SSOP HYBRID/28
Budgetary
Price (See Notes)
5.3
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Simplified Block Diagram

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Sampling:
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Parameters

Parametric specs for Appletalk and IrDA
Functions IrDA/RS-232 Transceiver
VSUPPLY (V) 3.0 to 5.5
Data Rate (kbps) (max) 115.2
# Single Ended Tx 2
Single Ended Rx 2
Shutdn Yes
µP I/F TTL/CMOS
ICC (mA) (max) 1
ICC (Shutdown) (µA) 10
Package/Pins SSOP HYBRID/28
Budgetary
Price (See Notes)
5.3

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

Applications/Uses

  • Battery-Powered Applications
  • Cell Phones
  • Handheld Equipment
  • IrDA Applications
  • Palmtop Computers
  • PDAs and Other Handheld Devices
  • Peripherals

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 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.

Simplified Block Diagram

MAX3130, MAX3131: Pin Configuration MAX3130, MAX3131: Pin Configuration Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.