74hc14中文资料

74HC1474HC1474HC1474HC14中文资料74HC14的作用：六反相斯密特触发器真值表：Y=AInput输入output输出AYLHHL图1引脚功能极限参数：SupplyVoltage电源电压7VInputVoltage输入电压7VOperatingFreeAirTemperatureRange自由空气温度范围0℃to+70℃StorageTemperatureRange储存温度范围-65℃to+150℃RecommendedOperatingConditions建议操作条件Symbol符号Parameter参数最小典型最大UNIT单位VCCSupplyVoltage电源电压4.7555.25VVT+Positive-GoingInputThresholdVoltage正向输入阈值电压(Note2)1.41.61.9VVT-Negative-GoingInputThresholdVoltage反向输入阈值电压(Note2)0.50.81VHYSInputHysteresis输入滞后(Note2)0.40.8-VIOHHIGHLevelOutputCurrent高电平输出电流---0.4mAIOLLOWLevelOutputCurrent低电平输出电流--8mATAFreeAirOperatingTemperature工作温度0-70℃Note2:VCC=5V.ElectricalElectricalElectricalElectricalCharacteristicsCharacteristicsCharacteristicsCharacteristics电气特性overrecommendedoperatingfreeairtemperaturerange(unlessotherwisenoted)Symbol符号Parameter参数Conditions条件最小典型最大UNIT单位VIInputClampVoltage输入钳位电压VCC=最小,II=-18mA---1.5VVOHHIGHLevelOutputVoltage输出高电平电压VCC=最小,IOH=最大VIL=最大2.73.4-VVOLLOWLevel输出低电平电压VCC=最小,IOL=最大-0.350.5--OutputVoltage输出电压VIH=最小---VVCC=最小,IOL=4mA-0.250.4IT+InputCurrentatPositive-GoingThreshold正向阈值输入电流VCC=5V,VI=VT+--0.14-mAIT-InputCurrentatNegative-GoingThreshold反向阈值输入电流VCC=5V,VI=VT---0.18-mAIIInputCurrent@MAXInputVoltage输入电流@最大输入电压VCC=最大,VI=7V--0.1mAIIHHIGHLevelInputCurrent输入高电平电流VCC=最大,VI=2.7V--20μAIILLOWLevelInputCurrent输入低电平电流VCC=最大,VI=0.4V---0.4mAIOSShortCircuitOutputCurrent短路输出电流VCC=最大(Note4)-20--100mAICCHSupplyCurrentwithOutputsHIGH高电平输出电源电流VCC=最大-8.616mAICCLSupplyCurrentwithOutputsLOW低电平输出电源电流VCC=最大-1221mANote3:VCC=5V,TA=25℃.Note4:Notmorethanoneoutputshouldbeshortedatatime,andthedurationshouldnotexceedonesecond.SwitchingCharacteristics开关特性atVCC=5VandTA=25℃SwitchingCharacteristics开关特性atVCC=5VandTA=25℃Symbol符号Parameter参数RL=2kΩUNIT单位CL=15pFCL=50pF最小最大最小最大tPLHPropagationDelayTimeLOW-to-HIGHLevelOutput低到高电平输出传递延迟时间522825nstPHLPropagationDelayTimeHIGH-to-LOWLevelOutput高到低电平输出传递延迟时间5221033ns应用电路：图2光电藕合器接收整形电路图3方波振荡器