MAX3227CAE - 3.0V to 5.5V, 1µA, 250kbps, RS-232 Transceivers with AutoShutdown Plus™

The MAX3227CAE is a high-performance RS-232 transceiver from Maxim Integrated, designed to communicate at data rates up to 250kbps while maintaining RS-232 output levels. This device is an ideal choice for battery-powered applications due to its low-power consumption, operating from a single +3.0V to +5.5V power supply. The MAX3227CAE is part of Maxim's family of transceivers that feature AutoShutdown Plus™, which significantly reduces the power consumption by entering a low-power shutdown mode when no data is present on the receiver or transmitter inputs.

Encased in a 16-pin SSOP package, the MAX3227CAE integrates a proprietary low-dropout transmitter output stage, delivering true RS-232 performance from a 3.0V to 5.5V supply with a minimal current draw of just 1µA when in shutdown mode. The device is capable of running at 250kbps while maintaining a 3V logic interface, providing a seamless interface for connecting low-voltage circuits to RS-232-compatible serial ports.

The MAX3227CAE features a 2-driver/2-receiver configuration, which includes a complete charge-pump circuit that generates RS-232 voltage levels from the single-ended power supply. This integrated charge pump and 4 x 0.1µF external capacitors allow for efficient voltage conversion and line regulation, ensuring reliable data transmission and reception even with varying supply voltages.

With its enhanced ESD protection, the MAX3227CAE is capable of withstanding ±15kV discharges, offering robustness for applications in harsh environments. Its AutoShutdown Plus™ feature not only reduces power consumption but also extends the life of the battery in portable devices. The device's receivers remain active in shutdown mode, allowing the MAX3227CAE to wake up upon detecting activity on the receiver inputs, making it extremely useful for remote sensors and portable instrumentation.

The MAX3227CAE is the optimal solution for designers looking for a reliable, low-power RS-232 transceiver for applications such as PDAs, GPS receivers, and other mobile computing devices where power efficiency is crucial. Its combination of features and performance makes it a versatile choice for a wide range of low-voltage serial communication needs.