MAX3130CAI+

Overview

The MAX3130CAI+ is a hybrid microcircuit integrating an IrDA infrared transceiver and an RS-232 interface, operating on a single +3.0V to +5.5V supply. It supports IrDA data rates from 2.4kbps to 115kbps with a high-gain PIN-diode amplifier rejecting up to 100µA of ambient photodiode current at +3V. The infrared transmitter includes a driver capable of sinking 200mA. The RS-232 section provides two drivers and two receivers supporting data rates up to 120kbps via a dual charge-pump power supply. Typical supply current is 370µA, reducing to 1µA in shutdown mode.

Feature Summary

• Integrates IrDA 1.2 compatible infrared transceiver and RS-232 interface within a single package
• Includes onboard encoder/decoder (ENDEC) to facilitate communication with non-IrDA UARTs
• Features selectable shutdown modes for both IR and RS-232 circuitry to minimize power consumption
• Provides multiplexed I/O capability for the MAX3130 variant to share pins between interfaces

Applications

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

Procurement Notes

Verify that the component suffix matches the specific device variant required for the application. Confirm the ordering code corresponds to the correct temperature range and package type. Ensure the supplier source is authorized to guarantee authenticity. Check for RoHS compliance status if environmental regulations apply to the manufacturing process.

Selection Notes

Select the MAX3130 when a single UART must be shared between infrared and RS-232 communications using multiplexed inputs and outputs. Choose the MAX3131 if independent data paths are required for simultaneous operation of both protocols. Consider the thermal environment and ensure the selected temperature grade meets the operational requirements of the final system design.

Part Context

This component belongs to the MAX3130/MAX3131 family of 3V to 5.5V hybrid microcircuits designed for portable devices. It combines IrDA infrared capabilities with standard RS-232 serial communication. The CAI suffix indicates a commercial temperature range of 0°C to +70°C housed in a 28-pin SSOP package.

Replacement Considerations

Public confirmed substitute part numbers: MAX3130CAI-T, MAX3130CAI+T, MAX3131CAI.