MAX3224EAP+

Overview

The MAX3224EAP+ is a dual-driver, dual-receiver RS-232 transceiver manufactured by Analog Devices/Maxim Integrated. It operates on a single +3.0V to +5.5V supply and achieves a typical supply current of 1µA through the AutoShutdown Plus feature. The device guarantees a maximum data rate of 250kbps and includes an internal dual charge pump requiring only four small capacitors. It features a 20-pin SSOP package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• AutoShutdown Plus technology automatically reduces power consumption when the interface is idle or disconnected.
• Integrated dual charge pump generates required voltage levels without external inductors.
• Logic-level READY output indicates when the charge pump is 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 20-pin SSOP package configuration. Confirm lead-free/RoHS compliance status as indicated by the '+' designation. Ensure the source documentation matches the exact part number to avoid confusion with other pinout variants within the MAX3224 family.

Selection Notes

Select this component for applications requiring low-power standby modes in battery-operated systems. The 250kbps data rate suits standard serial communication needs. Consider the MAX3225EAP+ if a higher 1Mbps data rate is required for the same package and thermal specifications.

Part Context

This part belongs to the MAX3224–MAX3227/MAX3244/MAX3245 family of 3V-powered EIA/TIA-232 interfaces. The 'E' suffix denotes extended industrial temperature ratings, while 'AP' specifies the SSOP package type. These devices share common architectural features like the proprietary low-dropout transmitter stage and automatic shutdown logic.

Replacement Considerations

MAX3224CAP+ (Commercial temperature range)

FAQ

How does the AutoShutdown Plus feature function?

It enters a low-power shutdown mode when the RS-232 cable is disconnected or inputs are inactive for more than 30 seconds, waking up upon sensing a valid transition.

What is the purpose of the READY output?

The READY output asserts high when the charge pump is regulating and the device is ready to begin transmitting.