Product Summary

The MAX3221ECAE is a 3V-powered EIA/TIA-232 and V.28/V.24 communication interface with automatic shutdown/wakeup features, high datarate capabilities, and enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver inputs of the MAX3221ECAE are protected to ±15kV using IEC 1000-4-2 Air-Gap Discharge, to ±8kV using IEC 1000-4-2 Contact Discharge, and to ±15kV using the Human Body Model. The MAX3221ECAE achieves a 1μA supply current with Maxim revolutionary AutoShutdown. feature. They save power without changes to the existing BIOS or operating system by entering low-power shutdown mode when the RS-232 cable is disconnected, or when the transmitters of the connected peripherals are off. The transceiver of the MAX3221ECAE has a proprietary low-dropout transmitter output stage, delivering true RS-232 performance from a +3.0V to +5.5V supply with a dual charge pump. The charge pump requires only four small 0.1μF capacitors for operation from a +3.3V supply. The MAX3221ECAE is guaranteed to run at data rates of 250kbps while maintaining RS-232 output levels.

Parametrics

MAX3221ECAE absolute maximum ratings: (1)VCC to GND: -0.3V to +6V; (2)V+ to GND: -0.3V to +7V; (3)V- to GND: +0.3V to -7V; (4)V+ + |V-|: +13V; (5)Input Voltages T_IN, EN, FORCEON, FORCEOFF to GND: -0.3V to +6V; (6)R_IN to GND: ±25V; (7)Output Voltages T_OUT to GND: ±13.2V; (8)R_OUT, R2OUTB, INVALID to GND: -0.3V to (VCC + 0.3V); (9)Short-Circuit Duration T_OUT to GND: Continuous; (10)Storage Temperature Range: -65℃ to +160℃; (11)Lead Temperature (soldering, 10sec): +300℃.

Features

MAX3221ECAE features: (1)ESD Protection for RS-232 I/O Pins:±15kV—Human Body Model; ±8kV—IEC1000-4-2, Contact Discharge; ±15kV—IEC1000-4-2, Air-Gap Discharge; (2)Latchup Free; (3)1μA Supply Current; (4)250kbps Guaranteed Data Rate; (5)6V/μs Guaranteed Slew Rate; (6)Meets EIA/TIA-232 Specifications Down to 3.0V; (7)Smallest Single-Supply RS-232 Transceiver; (8)Guaranteed Mouse Driveability; (9)Small 0.1μF Capacitors.

Diagrams

MAX3221ECAE Interface Under Control of PMU

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