MAX3244EEUI+T

Overview

The MAX3244EEUI+T is a low-power RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It features three drivers and five receivers with full-duplex communication capability. The device operates on a single +3.0V to +5.5V supply and achieves a typical supply current of 1µA through AutoShutdown Plus technology. It guarantees a maximum data rate of 250kbps. The component utilizes a dual charge pump requiring four small capacitors for voltage generation. It includes an INVALID output for signal detection and R2OUTB for continuous monitoring. The part is housed in a 28-pin TSSOP package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption when the interface is idle or disconnected.
• Integrated dual charge pump generates required RS-232 voltages using minimal external capacitance.
• Dedicated INVALID output detects valid RS-232 signal levels independent of shutdown states.
• Noninverting complementary receiver output (R2OUTB) remains active during shutdown for peripheral monitoring.

Applications

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

Procurement Notes

Verify the specific suffix EEUI+T against the manufacturer's official datasheet to confirm the exact package type, temperature grade, and lead-free compliance status. Ensure that the ordering information matches the required pin configuration and electrical characteristics for the target application design.

Selection Notes

Select this component for applications requiring low standby power and automatic wake-up capabilities. The MAX3244 variant is suitable for systems needing up to 250kbps data rates. Verify that the system can accommodate the required external capacitors for the charge pump and ensure compatibility with the UART logic levels.

Part Context

This device belongs to the MAX3224–MAX3227/MAX3244/MAX3245 family of 3V-powered EIA/TIA-232 communications interfaces. The MAX3244 specifically provides three drivers and five receivers, distinguishing it from other family members like the MAX3245 which supports higher data rates. All devices share the same core AutoShutdown Plus architecture.

Replacement Considerations

The MAX3245EUI+T serves as a functional substitute within the same family, offering identical pinout and features but guaranteeing a 1Mbps data rate instead of 250kbps. Other compatible variants include the MAX3244ECAI+T and MAX3244EEAI+T, which provide the same electrical specifications in different package formats.