- 您现在的位置：买卖IC网 > PDF目录382335 > MM74HC123A (National Semiconductor Corporation) Dual Retriggerable Monostable Multivibrator(双通道可再触发的单稳态多谐振荡器) PDF资料下载
参数资料
| 型号： | MM74HC123A |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | Dual Retriggerable Monostable Multivibrator(双通道可再触发的单稳态多谐振荡器) |
| 中文描述： | 双Retriggerable单稳态触发器（双通道可再触发的单稳态多谐振荡器） |
| 文件页数： | 4/6页 |
| 文件大小： | 198K |
| 代理商： | MM74HC123A |
Logic Diagram
TL/F/5206–5
Theory of Operation
TL/F/5206–6
j
POSITIVE EDGE TRIGGER
m
POSITIVE EDGE RE-TRIGGER (PULSE LENGTHENING)
k
NEGATIVE EDGE TRIGGER
n
RESET PULSE SHORTENING
l
POSITIVE EDGE TRIGGER
o
CLEAR TRIGGER
FIGURE 1
TRIGGER OPERATION
As shown in Figure 1 and the logic diagram before an input
trigger occurs, the one shot is in the quiescent state with the
Q output low, and the timing capacitor C
EXT
completely
charged to V
CC
. When the trigger input A goes from V
CC
to
GND (while inputs B and clear are held to V
CC
) a valid trig-
ger is recognized, which turns on comparator C1 and N-
channel transistor N1
j
. At the same time the output latch
is set. With transistor N1 on, the capacitor C
EXT
rapidly dis-
charges toward GND until V
REF1
is reached. At this point
the output of comparator C1 changes state and transistor
N1 turns off. Comparator C1 then turns off while at the
same time comparator C2 turns on. With transistor N1 off,
the capacitor C
EXT
begins to charge through the timing re-
4
相关PDF资料 |
PDF描述 |
|---|---|
| MM54HC123AJ | Dual Retriggerable Monostable Multivibrator |
| MM74HC137 | 3-to-8 Line Decoder With Address Latches (Inverted Output) |
| MM74HC137J | 3-to-8 Line Decoder With Address Latches (Inverted Output) |
| MM74HC137N | 3-to-8 Line Decoder With Address Latches (Inverted Output) |
| MM54HC137 | 3-to-8 Line Decoder With Address Latches (Inverted Output) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MM74HC123A_01 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Dual Retriggerable Monostable Multivibrator |
| MM74HC123AJ | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Dual Retriggerable Monostable Multivibrator |
| MM74HC123AM | 功能描述:单稳态多谐振荡器 DualMultivibrator RoHS:否 制造商:Texas Instruments 每芯片元件:1 逻辑系列:LVC 逻辑类型:Monostable Multivibrator 封装 / 箱体:SSOP-8 传播延迟时间:18.6 ns 高电平输出电流:- 32 mA 低电平输出电流:32 mA 电源电压-最大:5.5 V 电源电压-最小:1.65 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
| MM74HC123AM | 制造商:Fairchild Semiconductor Corporation 功能描述:IC 74HC CMOS SMD 74HC123 SOIC16 |
| MM74HC123AM_Q | 功能描述:单稳态多谐振荡器 DualMultivibrator RoHS:否 制造商:Texas Instruments 每芯片元件:1 逻辑系列:LVC 逻辑类型:Monostable Multivibrator 封装 / 箱体:SSOP-8 传播延迟时间:18.6 ns 高电平输出电流:- 32 mA 低电平输出电流:32 mA 电源电压-最大:5.5 V 电源电压-最小:1.65 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。