【图】74HC14中文资料
(2024/2/4 7:00:00)
74HC14中文资料
74HC14中文资料
Recommended Operating Conditions建议操作条件
74HC14中文资料
74HC14的作用：六反相斯密特触发器
74HC14引脚图:
图1 引脚功能
74HC14真值表:
真值表：Y=A
Input输入
| output输出
|
A
| Y
|
L
| H
|
H
| L
|
74HC14电气参数:
极限参数：
Supply Voltage 电源电压
| 7V
|
Input Voltage输入电压
| 7V
|
Operating Free Air Temperature Range自由空气温度范围
| 0℃ to +70℃
|
Storage Temperature Range储存温度范围
| -65℃ to +150℃
|
Recommended Operating Conditions建议操作条件
Symbol 符号
| Parameter 参数
| 最小
| 典型
| 最大
| UNIT 单位
|
VCC
| Supply Voltage 电源电压
| 4.75
| 5
| 5.25
| V
|
VT+
| Positive-Going Input Threshold Voltage 正向输入阈值电压(Note 2)
| 1.4
| 1.6
| 1.9
| V
|
VT-
| Negative-Going Input Threshold Voltage 反向输入阈值电压(Note 2)
| 0.5
| 0.8
| 1
| V
|
HYS
| Input Hysteresis 输入滞后(Note 2)
| 0.4
| 0.8
| -
| V
|
IOH
| HIGH Level Output Current高电平输出电流
| -
| -
| -0.4
| mA
|
IOL
| LOW Level Output Current低电平输出电流
| -
| -
| 8
| mA
|
TA
| Free Air Operating Temperature工作温度
| 0
| -
| 70
| ℃
|
Note 2: VCC = 5V.
| |||||
Electrical Characteristics 电气特性
| ||||||
over recommended operating free air temperature range (unless otherwise noted)
| ||||||
Symbol 符号
| Parameter 参数
| Conditions 条件
| 最小
| 典型
| 最大
| UNIT 单位
|
VI
| Input Clamp Voltage输入钳位电压
| VCC = 最小, II = -18mA
| -
| -
| -1.5
| V
|
VOH
| HIGH Level Output Voltage输出高电平电压
| VCC=最小,IOH=最大 VIL=最大
| 2.7
| 3.4
| -
| V
|
VOL
| LOW Level输出低电平电压
| VCC = 最小, IOL = 最大
| -
| 0.35
| 0.5
| -
|
-
| Output Voltage输出电压
| VIH = 最小
| -
| -
| -
| V
|
VCC = 最小, IOL = 4mA
| -
| 0.25
| 0.4
| |||
IT+
| Input Current at Positive-Going Threshold 正向阈值输入电流
| VCC = 5V, VI = VT+
| -
| -0.14
| -
| mA
|
IT-
| Input Current at Negative-Going Threshold反向阈值输入电流
| VCC = 5V, VI = VT-
| -
| -0.18
| -
| mA
|
II
| Input Current @ MAX Input Voltage输入电流@最大输入电压
| VCC = 最大, VI = 7V
| -
| -
| 0.1
| mA
|
IIH
| HIGH Level Input Current输入高电平电流
| VCC = 最大, VI = 2.7V
| -
| -
| 20
| μA
|
IIL
| LOW Level Input Current输入低电平电流
| VCC = 最大, VI = 0.4V
| -
| -
| -0.4
| mA
|
IOS
| Short Circuit Output Current短路输出电流
| VCC = 最大 (Note 4)
| -20
| -
| -100
| mA
|
ICCH
| Supply Current with Out puts HIGH高电平输出电源电流
| VCC = 最大
| -
| 8.6
| 16
| mA
|
ICCL
| Supply Current with Outputs LOW低电平输出电源电流
| VCC = 最大
| -
| 12
| 21
| mA
|
Note 3: VCC = 5V, TA = 25℃.
| ||||||
Note 4: Not more than one output should be shorted at a time, and the duration should not exceed one second.
| ||||||
Switching Characteristics开关特性 at VCC = 5V and TA = 25℃
Switching Characteristics开关特性
| ||||||
at VCC = 5V and TA = 25℃
| ||||||
Symbol 符号
| Parameter 参数
| RL = 2kΩ
| UNIT 单位
| |||
CL = 15pF
| CL = 50pF
| |||||
最小
| 最大
| 最小
| 最大
| |||
tPLH
| Propagation Delay Time LOW-to-HIGH Level Output低到高电平输出传递延迟时间
| 5
| 22
| 8
| 25
| ns
|
tPHL
| Propagation Delay Time HIGH-to-LOW Level Output高到低电平输出传递延迟时间
| 5
| 22
| 10
| 33
| ns
|
采用施密特触发器74HC14的光耦接收整形电路:
图2 光电耦合器接收整形电路
采用施密特触发器74HC14的方波振荡器电路
图3 方波振荡器
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