外文翻譯---max232-5v的供電，多通道rs-232接口驅(qū)動(dòng)器接收器(存儲(chǔ)版)
【正文】 ，所有接收顛倒。表2說明了關(guān)斷控制和三態(tài)門控制接收器輸出的影響。內(nèi)部輸入上拉電阻電流通常12μ，除了在關(guān)斷模式下都不能被使用。RS232接口卡 當(dāng)一個(gè)5kΩRS232接收器接電源5V時(shí)，典型的驅(qū)動(dòng)器輸出電壓幅值變化為177。第一個(gè)轉(zhuǎn)換器使用電容器C1將+5V變?yōu)?10V在C3上的V+上輸出，而第二個(gè)轉(zhuǎn)換器使用電容C2將+10V轉(zhuǎn)變?yōu)?0V在C4在V輸出。每個(gè)接收器轉(zhuǎn)換TIA/EIA232F需要工作電壓5V的TTL/CMOS。附錄AMAX2325VPowered,Multichannel RS232 Drivers/Receivers The MAX232 is a dual driver/receiver that includes a capacitive voltage generator to supply TIA/EIA232F voltage levels from a single 5V supply. Each receiver converts TIA/EIA232F inputs to 5V TTL/CMOS levels. These receivers have a typical threshold of V, a typical hysteresis of V, and can accept 177。25V and provide input terminating resistors with nominal 5kΩ values. The receivers implement Type 1 interpretation of the fault conditions of and EIA/TIA232E. The receiver input hysteresis is typically with a guaranteed minimum of . This produces clear output transitions with slowmoving input signals, even with moderate amounts of noise and ringing. The receiver propagation delay is typically 600ns and is independent of input swing direction.LowPower Receive ModeThe lowpower receivemode feature of the MAX223, MAX242, and MAX245–MAX249 puts the IC into shutdown mode but still allows it to receive information. This is important for applications where systems are periodically awakened to look for activity. Using lowpower receive mode, the system can still receive a signal that will activate it on mand and prepare it for munication at faster data rates. This operation conserves system power.Receiver and Transmitter EnableThe MAX225 and MAX245–MAX249 feature transmitter and receiver enable controls.The receivers have three modes of operation: fullspeed receive (normal active)? threestate (disabled)? and low power receive (enabled receivers continue to functionat lower data rates). The receiver enable inputs control the fullspeed receive and threestate modes. The transmitters have two modes of operation: fullspeed transmit (normal active) and threestate (disabled). The transmitter enable inputs also control the shutdown mode. The device enters shutdown mode when all transmitters are disabled. Enabled receivers function in the lowpower receive mode when in shutdown.Shutdown—MAX222–MAX242On the MAX222? MAX235? MAX236? MAX240? and MAX241? all rece
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