MAX3130 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX3130

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

Maxim Integrated 

19-1402; Rev 0; 11/98

3V to 5.5V, IrDA Infrared Transceiver with

Integrated RS-232 Interface

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

Ordering Information

PART

MAX3130CAI

MAX3130EAI

MAX3131CAI

MAX3131EAI

TEMP. RANGE

0°C to +70°C

-40°C to +85°C

0°C to +70°C

-40°C to +85°C

PIN-PACKAGE

28 SSOP

28 SSOP

28 SSOP

28 SSOP

Pin Configuration

TOP VIEW

EDGEDET (RXD) 1

T1IN 2

T2IN 3

IRMODE (TXD) 4

R1OUT 5

R1IN 6

T1OUT 7

BAUD16 8

GND 9

VCC 10

N.C. 11

AVCC 12

AGND 13

PINC 14

( ) ARE FOR MAX3131

MAX3130

MAX3131

SSOP

28 R2OUT

27 R2IN

26 T2OUT

25 RSSD

24 V-

23 C2-

22 C2+

21 C1-

20 C1+

19 V+

18 N.C.

17 LEDC

16 PGND

15 IRSD

________________________________________________________________ Maxim Integrated Products 1

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.

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