MAX3224EAP+T

Overview

The MAX3224EAP+T is a dual-driver, dual-receiver RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +3.0V to +5.5V supply and features AutoShutdown Plus technology, achieving a typical 1µA supply current when inactive. The device guarantees a maximum data rate of 250kbps and includes an internal dual charge pump requiring only four 0.1µF capacitors for operation at 3.3V. It provides a READY output signal indicating charge pump regulation status. The component is housed in a 20-pin SSOP package and supports an industrial operating temperature range of -40°C to +85°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption by disabling the charge pump during periods of inactivity or cable disconnection.
• Integrated dual charge pump generates required RS-232 voltage levels using minimal external capacitance.
• READY output pin asserts high to indicate that the internal charge pumps are regulating and the device is ready for transmission.

Applications

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

Procurement Notes

Verify the specific suffix 'EAP' corresponds to the -40°C to +85°C temperature range and SSOP-20 package configuration. Confirm RoHS compliance and lead-free status indicated by the '+' designation. Ensure the source documentation matches the exact part number to avoid confusion with similar variants like the MAX3225 or MAX3226 which differ in data rate specifications.

Selection Notes

Select this component for applications requiring low-power standby modes without BIOS modifications. The 250kbps data rate suits standard serial communication needs. Consider the MAX3225 variant if 1Mbps speed is required. Verify that the system can accommodate the 20-pin SSOP footprint and that the external capacitor values align with the 3.3V or 5V supply requirements specified in the datasheet.

Part Context

This device belongs to the MAX3224–MAX3227/MAX3244/MAX3245 family of 3V-powered EIA/TIA-232 interface ICs. While sharing the AutoShutdown Plus feature and low supply current characteristics, other members of the family vary in guaranteed data rates (up to 1Mbps) and driver/receiver counts. The MAX3224 specifically defines the 250kbps performance tier within this series.

Replacement Considerations

Public confirmed substitute part numbers: MAX3224CAP+T, MAX3224CPP+, MAX3224CTP+, MAX3224CUP+, MAX3224EPP+, MAX3224ETP+, MAX3224EUP+