MAX3130CAI

Overview

The MAX3130CAI is a hybrid microcircuit integrating an IrDA 1.2 compatible infrared transceiver with a dual-driver/dual-receiver RS-232 interface. It operates on a single +3.0V to +5.5V supply, consuming 370µA typical supply current and reducing to 1µA in shutdown mode. The IR channel supports data rates from 2.4kbps to 115kbps with a high-power LED driver capable of sinking 200mA. The RS-232 section supports data rates up to 120kbps using internal charge pumps for voltage generation. The device utilizes a 28-pin SSOP package.

Feature Summary

• Integrates IrDA infrared transceiver and RS-232 interface in a single package
• Includes onboard encoder/decoder for non-IrDA UART compatibility
• Features high-current infrared LED drive capability
• Provides low-power shutdown modes for both IR and RS-32 sections

Applications

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

Procurement Notes

Verify the specific ordering suffix CAI corresponds to the commercial temperature range of 0°C to +70°C as defined in the official Maxim Integrated datasheet. Confirm that the component is sourced from authorized distributors to ensure authenticity and compliance with the specified electrical characteristics and packaging standards.

Selection Notes

Select the MAX3130CAI when multiplexing a single UART between infrared and RS-232 communication paths is required. This model shares transmitter and receiver lines via the IRMODE pin, unlike the MAX3131 which maintains separate interfaces. Ensure external optical components meet the specified wavelength and sensitivity requirements for reliable operation.

Part Context

The MAX3130CAI belongs to the MAX3130/MAX3131 family of 3V to 5.5V infrared transceivers with integrated RS-232 interfaces. Manufactured by Analog Devices Inc./Maxim Integrated, this series addresses the need for compact communication solutions in portable electronics by combining two distinct serial protocols into one hybrid microcircuit.

Replacement Considerations

The MAX3131CAI serves as a functional alternative within the same family but features independent IrDA and RS-232 interfaces rather than the multiplexed architecture of the MAX3130.