MAX3130CAI+T

Overview

The MAX3130CAI+T is a hybrid microcircuit integrating an IrDA infrared transceiver and an RS-232 interface. It operates on a single +3.0V to +5.5V supply with typical supply current of 370µA. The IR channel supports data rates from 2.4kbps to 115kbps, featuring a high-power LED driver capable of sinking 200mA. The RS-232 section provides two drivers and two receivers supporting up to 120kbps. The device utilizes internal dual charge pumps for voltage generation and includes an on-board encoder/decoder. It is housed in a 28-pin SSOP package.

Feature Summary

• Integrates IrDA 1.2 compatible infrared transceiver and RS-232 interface in a single package
• Includes on-board encoder/decoder allowing use with non-IrDA UARTs
• Features selectable shutdown modes reducing supply current to 1µA
• Provides multiplexed I/O capability for the MAX3130 variant

Applications

• Personal Digital Assistants (PDAs)
• Palmtop Computers
• Battery-Powered Systems
• Hand-Held Equipment
• Cellular Phones

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm that the ordering suffix matches the required temperature range and packaging specifications. Ensure compliance with RoHS directives as indicated by the plus sign in the part number. Cross-reference datasheet revisions to confirm pinout and electrical characteristics remain consistent with design requirements.

Selection Notes

Select this component when a single UART must support both infrared and serial communication protocols. The MAX3130 variant is suitable for multiplexed applications sharing one transmitter and receiver line. The MAX3131 variant is appropriate for independent simultaneous operation. Verify that external optical components meet the specified irradiance and capacitance requirements for reliable signal integrity.

Part Context

This device belongs to the MAX3130/MAX3131 family of 3V to 5.5V hybrid microcircuits. It combines IrDA infrared transceivers with integrated RS-232 interfaces. The CAI suffix indicates commercial temperature range operation within a 28-pin SSOP package. This integration reduces external component count compared to discrete solutions.

Replacement Considerations

MAX3131CAI+T offers independent IrDA and RS-232 channels instead of multiplexed I/O.