MAX3235E：±15kV ESD保护、1µA、250kbps、3.3V/5V、双路RS-232收发器，内置电容

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.

关键特性

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

MAX3233E、MAX3235E：典型工作电路

应用

电池供电应用
蜂窝电话
嵌入式系统
手持式装置
外设
亚笔记本与掌上电脑

数据手册DataSheet

语言	下载文件	备注
英文	MAX3233E-MAX3235E.pdf	Rev 2; 09/2004

关键参数

Part Number	V_SUPPLY (V)	Tx	Rx	Data Rate (kbps)	I_CC (mA)	Internal Charge Pump	Ext. Caps	ESD Protect. (±kV)	Rx Active in Shutdn	Package/Pins	Budgetary Price
Part Number	V_SUPPLY (V)	Tx	Rx	min	typ	Internal Charge Pump	Ext. Caps	ESD Protect. (±kV)	Rx Active in Shutdn	Package/Pins	See Notes
MAX3233E	3.3	2	2	250	0.3	Yes	0	15	2	PDIP(N)/20 SOIC/20	$4.62 @1k
MAX3235E	5	2	2	250	0.3	Yes	0	15	2	PDIP(N)/20 SOIC/20	$4.48 @1k

技术资料

质量和环境数据

MAX3235E.pdf

订购型号

型号	状况	推荐替代产品	封装	温度	RoHS/无铅
MAX3235ECPP	停止供货		PDIP(N),；20引脚；219.2mm²	0°C至+70°C	RoHS/无铅：否
MAX3235ECPP+G36	停止供货		PDIP；	0°C至+70°C	参考数据资料
MAX3235ECWP	停止供货		SOIC,；20引脚；SOIC H；20引脚	0°C至+70°C	RoHS/无铅：否
MAX3235ECWP+G36	生产中		SOIC,；20引脚；SOIC H；	0°C至+70°C	RoHS/无铅：无铅
MAX3235ECWP+TG36	生产中		SOIC,；20引脚；SOIC H；	0°C至+70°C	RoHS/无铅：无铅
MAX3235ECWP-T	停止供货		SOIC,；20引脚；SOIC H；20引脚	0°C至+70°C	RoHS/无铅：否
MAX3235EEPP	停止供货		PDIP(N),；20引脚；219.2mm²	-40°C至+85°C	RoHS/无铅：否
MAX3235EEPP+G36	停止供货		PDIP；	-40°C至+85°C	参考数据资料
MAX3235EEWP	停止供货		SOIC,；20引脚；SOIC H；20引脚	-40°C至+85°C	RoHS/无铅：否
MAX3235EEWP+G36	生产中		SOIC,；20引脚；SOIC H；	-40°C至+85°C	RoHS/无铅：无铅
型号	状况	推荐替代产品	封装：类型引脚占位面积封装图编码/变更 *	温度	RoHS/无铅？
MAX3235EEWP-T	停止供货		SOIC,；20引脚；SOIC H；20引脚	-40°C至+85°C	RoHS/无铅：否