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MAX3120

Low-Profile 3V, 120µA IrDA Infrared Transceiver

Overview

Description

The MAX3120 IrDA 1.2-compatible infrared transceiver is optimized for battery-powered, space-constrained applications. It consumes only 120µA while supporting data rates up to 115kbps over a wide 3V to 5.5V operating range, and features a 10nA shutdown mode to further extend battery life.

The MAX3120 reduces the space required for IrDA applications by requiring a minimum of external components: photodiode, infrared LED, and current-setting resistor. Optical components are external to allow maximum flexibility in PC board design. The MAX3120 is available in 8-pin µMAX® and SO packages. The µMAX package consumes half the board space of an 8-pin SO.

MAX3120: Typical Operating Circuit

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Key Features

IrDA 1.2 Compatible: 2.4kbps to 115.2kbps
+3V to +5.5V Single-Supply Operation
Flexible Optics Selection and Layout
120µA Supply Current
10nA Shutdown Supply Current
200mA, High-Current Infrared LED Drive

Applications/Uses

Cell Phones
Handheld Equipment
IrDA Applications
Palmtop Computers
PDAs and Other Handheld Devices
Peripherals

Key Specs

Part Number	Functions	V_SUPPLY (V)	Data Rate (kbps)	Shutdn	µP I/F	I_CC (mA)	I_CC (Shutdown) (µA)	Budgetary Price
			max			max		See Notes
MAX3120	IrDA Transceiver	3.0 to 5.5	115.2	Yes	TXD/RXD	0.2	20	$2.08 @1k
See All Appletalk and IrDA (4)
Pricing Notes: This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.