Open-Drain比push-pull少了个top transistor,只有bottom transistor。 就像push-pull中那样,当bottom transistor关闭,则输出为高电平,但此处没法输出高电平。 想要输出高电平,必须外部再接一个上拉电阻(pull-up resistor)。 Open-drain只能够漏电流(sink current),如果想要集电流(source current),则需要加一个上拉电阻。
Open-collector/ Open-drain是用于多个device间使用一个连接线来双向(Bi-directionally)通信的技术。 如图所示 因为Collector的pin没有和任何其他device连接所以叫Open Collector。BJT的情况叫做Open-Collector,MOSFET的情况叫做Open-drain。理论上BJT和MOSFET一样。 在input有high信号的话,transistor则为ON,此时Output和Groud...
Open-Drain与Push-Pull GPIO的功能,简单说就是可以根据自己的需要去配置为输入或输出。(General Purpose Input Output,简称为GPIO或总线扩展器,利用工业标准I2C、SMBus?或SPI?接口简化了I/O口的扩展。当微控制器或芯片组没有足够的I/O端口,或当系统需要采用远端串行通信或控制时,GPIO产品能够提供额外的控制和监视...
In open drain configuration, the logic behind the pin can drive it only to ground (logic 0). The other possible state ishigh impedance(Hi-Z). The implementation involves the use of a single transistor. If its drain terminal is open (the device is off) the pin is left floating to Hi-...
An open drain input/output structure in a semiconductor device according to the present invention includes: a gate formed with an enhancement transistor at a predetermined portion on a first conductive-type semiconductor substrate which is formed with a gate insulating layer; a second conductive-type...
Open-Drain与Push-Pull GPIO的功能,简单说就是可以根据自己的需要去配置为输入或输出。(General Purpose Input Output,简称为GPIO或总线扩展器,利用工业标准I2C、SMBus?或SPI?接口简化了I/O口的扩展。当微控制器或芯片组没有足够的I/O端口,或当系统需要采用远端串行通信或控制时,GPIO产品能够提供额外的控制和监视...
【Open-Drain与Push-Pull】 GPIO的功能,简单说就是可以根据自己的需要去配置为输入或输出。(General Purpose Input Output,简称为GPIO或总线扩展器,利用工业标准I2C、SMBus™或SPI™接口简化了I/O口的扩展。当微控制器或芯片组没有足够的I/O端口,或当系统需要采用远端串行通信或控制时,GPIO产品能够提供额外的控...
open drain和push pull GPIO常常可以设置为输出和输入;在配置GPIO管脚的时候,常会见到两种模式:开漏(open-drain,漏极开路)和推挽(push-pull); ...,但由于导通电阻大,价格贵,替换种类少等原因,在高端驱动中,通常还是使用NMOS。Push-Pull推挽输出 输出的器件是指输出脚内部集成有一对互补的MOSFE...
: [1.1] Initialize and start peripheralsI (1116) gpio: GPIO[36]| InputEn: 1| OutputEn: 0|OpenDrain: 0 hy3812023-03-10 07:20:55 ***HOTTEK六通道防水触摸芯片,超强抗干扰能力 的新一代电容式触摸芯片,可提供6个触摸感应按键,一对一直接CMOS输出,或者NMOS开漏(opendrain)输出,提供低功耗模式,可使...
TinyLogic UHS Dual 2-Input NAND Gate (Open Drain Output) NC7WZ38 Description The NC7WZ38 is a dual 2−Input NAND Gate with open drain output stage from ON Semiconductor's Ultra High Speed Series of TinyLogic. The device is fabricated with advanced CMOS technology to achieve ultra high ...