MAX3227E+

Product Summary

The MAX3227E+ is a 3V-powered EIA/TIA-232 and V.28/V.24 communications interface with automatic shutdown/wakeup features, high data-rate capabilities, and enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver inputs are protected to ±15kV using IEC 1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge, and ±15kV using the Human Body Model. The MAX3227E+ achieveS a 1μA supply current using Maxim’s
revolutionary AutoShutdown Plus TM feature. The MAX3227E+ automatically enters a low-power shutdown mode when the RS-232 cable is disconnected or the transmitters of the connected peripherals are inactive, and the UART driving the transmitter inputs is inactive for more than 30 seconds. They turn on again when they sense a valid transition at any transmitter or receiver
input. AutoShutdown Plus saves power without changes to the existing BIOS or operating system. TThe MAX3227E+ also features MegaBaud. operation, guaranteeing 1Mbps for highspeed applications such as communicating with ISDN modems. The MAX3227E+ features a logiclevel output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting. The MAX3227E+ is available in a space-saving SSOP package.

Parametrics

MAX3227E+ 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, FORCEOFF, FORCEOFF to GND: -0.3V to +6V; R_IN to GND: ±25V; (6)Output Voltages, T_OUT to GND: ±13.2V; R_OUT, RINVALID, EADY to GND: -0.3V to (VCC + 0.3V); (7)Short-Circuit Duration, T_OUT to GND: Continuous; (8)Continuous Power Dissipation (TA = +70℃): 571mW; (9)Storage Temperature Range: -65°C to +160℃; (10)Lead Temperature (soldering, 10sec): +300℃.

Features

MAX3227E+ 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)AutoShutdown Plus—EDN Innovation of the Year; (5)Guaranteed Data Rate:1Mbps; (6)Guaranteed Slew Rate: 24V/μs; (7)Meets EIA/TIA-232 Specifications Down to 3.0V; (8)Ready-to-Transmit Logic-Level Output.

Diagrams