MAX3224ETP+T

Overview

The MAX3224ETP+T is a single-driver, single-receiver RS-232 transceiver manufactured by Analog Devices Inc./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 for voltage generation. It is housed in a 20-pin TQFN-EP package with an exposed pad and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• AutoShutdown Plus technology automatically reduces supply current to 1µA when the interface is inactive or disconnected.
• Integrated dual charge pump generates required RS-232 voltages using minimal external capacitance.
• Proprietary low-dropout transmitter stage ensures true RS-232 performance across the full supply voltage range.
• Logic-level READY output indicates when 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 'ETP' corresponds to the -40°C to +85°C temperature range and the 20-pin TQFN-EP package configuration. Confirm RoHS compliance status as indicated by the '+' designation. Ensure the ordering information matches the exact pinout and electrical characteristics defined in the official datasheet before finalizing procurement.

Selection Notes

Select this component for applications requiring ultra-low power consumption during idle states via automatic shutdown capabilities. Choose the MAX3224 variant specifically when a single driver and receiver are sufficient, noting its 250kbps data rate limit compared to higher-speed siblings. Consider the exposed pad thermal design requirements inherent to the TQFN-EP package for optimal heat dissipation.

Part Context

This part belongs to the MAX3224–MAX3227/MAX3244/MAX3245 family of RS-232 transceivers. These devices share common features such as the AutoShutdown Plus circuitry and dual charge pump architecture. The MAX3224 serves as the single-channel entry point within this series, offering space-saving packaging options alongside multi-channel variants.

Replacement Considerations

Public confirmed substitute part numbers: MAX3224CUP+, MAX3224EAP+, MAX3224CPP+