描述 Description

The MAX3233E/MAX3235E are EIA/TIA-232 and V.28/V.24 communications interfaces with automatic shutdown/wake-up 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, to ±8kV using IEC 1000-4-2 Contact Discharge, and to ±15kV using the Human Body Model. The MAX3233E operates from a +3.3V supply; the MAX3235E operates from +5.0V.
All devices achieve a 1μA supply current using Maxim's revolutionary AutoShutdown Plus? feature. These devices automatically enter a low-power shutdown mode when the following two conditions occur: either 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.
The MAX3233E/MAX3235E have internal dual charge pumps requiring no external capacitors. Both transceivers have a proprietary low-dropout transmitter output stage that enables true RS-232 performance from a +3.0V to +3.6V supply for the MAX3233E or a +4.5V to +5.5V supply for the MAX3235E. These devices are guaranteed to operate up to 250kbps. Both are available in space-saving 20-pin wide SO or plastic DIP packages.

特性 Features

? ESD Protection for RS-232 I/O Pins
? ±15kV—Human Body Model
? ±8kV—IEC 1000-4-2, Contact Discharge
? ±15kV—IEC 1000-4-2, Air-Gap Discharge
? Latchup Free
? 1μA Supply Current
? AutoShutdown Plus-1997 EDN Magazine Innovation of the Year
? Single-Supply Operation
? +3.0V to +3.6V (MAX3233E)
? +4.5V to +5.5V (MAX3235E)
? 250kbps Guaranteed Data Rate
? 6V/μs Guaranteed Slew Rate
? Meets EIA/TIA-232 Specifications Down to 3.0V (MAX3233E)
? Internal Charge-Pump Capacitors

應(yīng)用 Application

? 電池供電應(yīng)用
? 蜂窩電話
? 嵌入式系統(tǒng)
? 手持式裝置
? 外設(shè)
? 亞筆記本與掌上電腦

簡介

MAX3233E屬于集成電路（IC）的驅(qū)動(dòng)器接收器收發(fā)器。由制造生產(chǎn)的MAX3233E驅(qū)動(dòng)器，接收器，收發(fā)器該系列產(chǎn)品的主要功能是提供必需的硬件資源，以通過延長電纜或印制線進(jìn)行通信。確切的功能會(huì)因所采用的通信協(xié)議而異，可能包括諸如瞬態(tài)抑制之類的功能，這些功能對于通信用途可能并非絕對必要，但對于可能的使用環(huán)境卻是明智之選。