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MAX3130 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX3130
Description  3V to 5.5V, IrDA Infrared Transceiver with Integrated RS-232 Interface
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX3130 Datasheet(HTML) 1 Page - Maxim Integrated Products

 
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For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
General Description
The MAX3130/MAX3131 combine an IrDA 1.2 compati-
ble 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 ambi-
ent 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 sig-
nals to and from the external UART, allowing IrDA com-
munication 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 trans-
mitter 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 sin-
gle UART for both infrared and RS-232 communication.
The infrared transmitter input and infrared receiver out-
put 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 com-
ponents: four small 0.1µF capacitors, a photodiode, an
infrared LED, and a current-setting resistor.
Applications
Personal Digital Assistants (PDAs)
Palmtop Computers
Battery-Powered Systems
Hand-Held Equipment
Peripherals
IrDA Applications
Cellular Phones
Features
o Integrated RS-232 and IrDA in Single 28-Pin SSOP
Package
o 370µA Supply Current
o IrDA 1.2 Compatible: 2.4kbps to 115kbps
Data Rate
o On-Board IR Encoder/Decoder Allows Use of
Non-IrDA UARTs
o +3.0V to +5.5V Single-Supply Operation
o Meet EIA/TIA-232 Specifications Down to +3V
o 200mA, High-Current Infrared LED Drive
o 1µA Low-Power Shutdown with RS-232
Receivers Active
3V to 5.5V, IrDA Infrared Transceiver with
Integrated RS-232 Interface
________________________________________________________________
Maxim Integrated Products
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R2OUT
R2IN
T2OUT
RSSD
V-
C2-
IRSD
C2+
C1-
C1+
V+
N.C.
LEDC
PGND
PINC
AGND
AVCC
N.C.
VCC
GND
BAUD16
T1OUT
R1IN
R1OUT
IRMODE (TXD)
T2IN
T1IN
EDGEDET (RXD)
SSOP
TOP VIEW
MAX3130
MAX3131
( ) ARE FOR MAX3131
19-1402; Rev 0; 11/98
PART
MAX3130CAI
MAX3130EAI
MAX3131CAI
0°C to +70°C
-40°C to +85°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
28 SSOP
28 SSOP
28 SSOP
Pin Configuration
Ordering Information
MAX3131EAI
-40°C to +85°C
28 SSOP


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