MAX3244CAI

Overview

The MAX3244CAI is a true RS-232 transceiver from the MAX3224–MAX3245 family, manufactured by Analog Devices Inc./Maxim Integrated. It features three drivers and five receivers in a full-duplex configuration. The device guarantees a maximum data rate of 250kbps and operates on a single +3.0V to +5.5V supply. It incorporates AutoShutdown Plus technology to achieve a typical 1µA supply current during inactivity. The component utilizes a dual charge pump requiring four small capacitors for voltage generation. It is housed in a 28-pin SSOP package and supports an operating temperature range of 0°C to +70°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption when the interface is idle or disconnected.
• Integrated dual charge pump enables standard RS-232 signal levels from low-voltage single supplies.
• Dedicated R2OUTB output allows continuous monitoring of receiver activity even when other outputs are disabled.
• INVALID logic output indicates the presence of valid RS-232 voltage levels at the receiver inputs.

Applications

• Notebook, subnotebook, and palmtop computers
• Cellular phones and handheld equipment
• Battery-powered peripherals and printers

Procurement Notes

Verify the specific suffix 'CAI' against the manufacturer's official documentation to confirm the commercial temperature grade (0°C to +70°C) and the 28-pin SSOP packaging. Ensure that the ordering information matches the exact part number variant required for your design specifications.

Selection Notes

Select this component for applications requiring low-power standby modes without BIOS modifications. The MAX3244 is suitable for systems needing three drivers and five receivers. Note that it guarantees 250kbps; choose the MAX3245 if 1Mbps operation is required instead.

Part Context

This device belongs to the MAX3224–MAX3245 series of 3V-powered RS-232 transceivers. It shares core architecture with the MAX3224, MAX3226, and MAX3245, differing primarily in guaranteed data rates and specific pin configurations within the broader family.

Replacement Considerations

The MAX3245 serves as a high-speed alternative within the same family, offering 1Mbps capability. Other compatible options include the MAX3224 and MAX3226 for similar 250kbps performance profiles.