MAX3244：1µA电源电流、1Mbps、3.0V至5.5V、RS-232收发器，提供AutoShutdown Plus

The MAX3224–MAX3227/MAX3244/MAX3245 are 3V-powered EIA/TIA-232 and V.28/V.24 communications interfaces with automatic shutdown/wakeup features and high data-rate capabilities. 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 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 MAX3225/MAX3227/MAX3245 also feature MegaBaud™ operation, guaranteeing 1Mbps for highspeed applications such as communicating with ISDN modems. The MAX3224/MAX3226/MAX3244 guarantee 250kbps operation. The transceivers have a proprietary low-dropout transmitter output stage enabling 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 MAX3224-MAX3227 feature a logic-level output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting. All devices are available in a space-saving TSSOP and SSOP packages.

关键特性

For Smaller Packaging:
- MAX3228/MAX3229: +2.5V to +5.5V RS-232 Transceivers in UCSP™
For Low-Voltage or Data Cable Applications:
- MAX3380E/MAX3381E: +2.35V to +5.5V, 1µA, 2 Tx/2 Rx RS-232 Transceivers with ±15kV ESD-Protected I/O and Logic Pins
For Integrated ESD Protection:
- MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E: ±15kV ESD-Protected, Down to 10nA, +3.0V to +5.5V, Up to 1Mbps, True RS-232 Transceivers (MAX3246E Available in UCSP)

MAX3224、MAX3225、MAX3226、MAX3227、MAX3244、MAX3245：引脚配置

应用

电池供电设备
蜂窝电话
手持式装置
笔记本电脑、亚笔记本电脑与掌上电脑
外设
打印机

数据手册DataSheet

语言	下载文件	备注
英文	MAX3224-MAX3245.pdf	Rev 5; 02/2011

关键参数

Part Number	V_SUPPLY (V)	Tx	Rx	Data Rate (kbps)	I_CC (mA)	Internal Charge Pump	Ext. Caps	Cap. Value (µF)	Rx Active in Shutdn	Package/Pins	Budgetary Price
Part Number	V_SUPPLY (V)	Tx	Rx	min	typ	Internal Charge Pump	Ext. Caps	nom	Rx Active in Shutdn	Package/Pins	See Notes
MAX3224	3.3 5	2	2	250	0.3	Yes	4	0.1	2	SSOP/20 TQFN/20 TSSOP/20	$2.56 @1k
MAX3225		2	2	1000					2	PDIP(N)/20 SSOP/20 TQFN/20 TSSOP/20	$2.56 @1k
MAX3226		1	1	250					2	SSOP/16	$1.67 @1k
MAX3227		1	1	1000					2	SSOP/16	$1.67 @1k
MAX3244		3	5	250					5	SOIC(W)/28 SSOP/28	$1.83 @1k
MAX3245		3	5	1000					5	SOIC(W)/28 SSOP/28	$1.83 @1k

技术资料

Determining Clock Accuracy Requirements for UART Communications

订购型号

型号	状况	推荐替代产品	封装	温度	RoHS/无铅
MAX3244CAI	停止供货	MAX3244CAI+	SSOP,；28引脚；81.6mm²	0°C至+70°C	参考数据资料
MAX3244CAI+	生产中		SSOP,；28引脚；81.6mm²	0°C至+70°C	RoHS/无铅：无铅
MAX3244CAI+T	生产中		SSOP,；28引脚；81.6mm²	0°C至+70°C	RoHS/无铅：无铅
MAX3244CAI-T	停止供货	MAX3244CAI+T	SSOP；28引脚	0°C至+70°C	参考数据资料
MAX3244CWI	停止供货	MAX3244CWI+	SOIC(W),；28引脚；192.8mm²	0°C至+70°C	RoHS/无铅：否
MAX3244CWI+	生产中		SOIC(W),；28引脚；192.8mm²	0°C至+70°C	RoHS/无铅：无铅
MAX3244CWI+T	停止供货		W.SO；	0°C至+70°C	参考数据资料
MAX3244CWI-T	停止供货		W.SO；28引脚	0°C至+70°C	参考数据资料
MAX3244EAI	停止供货	MAX3244EAI+	SSOP,；28引脚；81.6mm²	-40°C至+85°C	参考数据资料
MAX3244EAI+	生产中		SSOP,；28引脚；81.6mm²	-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？
MAX3244EAI+T	生产中		SSOP,；28引脚；81.6mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX3244EAI-T	停止供货	MAX3244EAI+T	SSOP；28引脚	-40°C至+85°C	参考数据资料
MAX3244EWI	停止供货		SOIC(W),；28引脚；192.8mm²	-40°C至+85°C	RoHS/无铅：否
MAX3244EWI-T	停止供货		W.SO；	-40°C至+85°C	参考数据资料

MAX3224-MAX3245.pdf MAX3245

Determining Clock Accuracy Requirements for UART Communications MAX3206E

MAX3224-MAX3245.pdf MAX3245