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  • 北京元坤伟业科技有限公司

         该会员已使用本站17年以上

  • 74VHC123AMX
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  • 深圳市芯脉实业有限公司

     该会员已使用本站11年以上
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  • 北京中其伟业科技有限公司

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  • 深圳市华芯盛世科技有限公司

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  • 上海熠富电子科技有限公司

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  • 深圳市硅诺电子科技有限公司

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  • 厂家onsemi(安森美) 
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产品型号74VHC123AMX的概述

芯片74VHC123AMX的概述 74VHC123AMX是一款高速CMOS多谐振荡器和单稳态触发器,广泛应用于各类数字电路中。该芯片属于74VHC系列,这个系列因其优异的性能和广泛的应用场合而受到重视。其工作电压范围广泛,从2V到5.5V,适用于多种电源电压情况下的应用需求。74VHC123AMX具备较高的操作速度,其高速性能使得它在时钟生成、延时电路和脉冲发生器中必不可少。 芯片74VHC123AMX的详细参数 74VHC123AMX的主要功能参数包括:输入电压范围、输出电流、功耗及工作频率等。具体参数如下: - 工作温度范围:-40℃至+125℃ - 输入电压范围:2V至5.5V - 输出电流:4mA(负载) - 最大功耗:约为0.1mW(典型值) - 频率范围:高达100MHz - 输入逻辑阈值:典型值为1.5V - 延时时间:可以在几个纳秒的范围内进行配置 这些参数使74VHC...

产品型号74VHC123AMX的Datasheet PDF文件预览

July 1993  
Revised April 1999  
74VHC123A  
Dual Retriggerable Monostable Multivibrator  
An input protection circuit ensures that 0 to 7V can be  
applied to the input pins without regard to the supply volt-  
age. This device can be used to interface 5V to 3V systems  
and two supply systems such as battery back up. This cir-  
cuit prevents device destruction due to mismatched supply  
and input voltages.  
General Description  
The VHC123A is an advanced high speed CMOS  
Monostable Multivibrator fabricated with silicon gate CMOS  
technology. It achieves the high speed operation similar to  
equivalent Bipolar Schottky TTL while maintaining the  
CMOS low power dissipation. Each multivibrator features  
both a negative, A, and a positive, B, transition triggered  
input, either of which can be used as an inhibit input. Also  
included is a clear input that when taken low resets the  
one-shot. The VHC123A can be triggered on the positive  
transition of the clear while A is held low and B is held high.  
The output pulse width is determined by the equation:  
PW = (Rx)(Cx); where PW is in seconds, R is in ohms, and  
Features  
High Speed:  
t
PD = 8.1 ns (typ) at TA = 25°C  
Low Power Dissipation:  
CC = 4 µA (Max) at TA = 25°C  
I
C is in farads.  
Active State: ICC = 600 µA (Max) at TA = 25°C  
Limits for Rx and Cx are:  
High Noise Immunity: VNIH = VNIL = 28% VCC (min)  
External capacitor, Cx No limit  
Power down protection is provided on all inputs  
Pin and function compatible with 74HC123A  
External resistors, Rx  
CC > 3.0V, 1 kmin  
VCC = 2.0V, 5 kmin  
V
Ordering Code:  
Order Number Package Number  
Package Description  
74VHC123AM  
74VHC123ASJ  
74VHC123AMTC  
74VHC123AN  
M16A  
M16D  
MTC16  
N16E  
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow  
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide  
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide  
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide  
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.  
Logic Symbol  
Connection Diagram  
IEEE/IEC  
© 1999 Fairchild Semiconductor Corporation  
DS011621.prf  
www.fairchildsemi.com  
Pin Descriptions  
Truth Table  
Pin Names  
Description  
Inputs  
Outputs  
Function  
A
Trigger Inputs (Negative Edge)  
Trigger Inputs (Positive Edge)  
Reset Inputs  
A
B
H
L
CLR  
H
Q
Q
B
Output Enable  
Inhibit  
CLR  
Cx  
X
H
L
H
L
L
H
H
External Capacitor  
External Resistor  
X
H
Inhibit  
Rx  
H
Output Enable  
Output Enable  
Reset  
Q, Q  
Outputs  
L
H
X
X
L
L
H
H = HIGH Voltage Level  
L = LOW Voltage Level  
X = Don’t Care  
= HIGH-to-LOW Transition  
= LOW-to-HIGH Transition  
Block Diagrams  
Note A: C , R , D are external Capacitor, Resistor, and Diode, respectively.  
x
x
x
Note B: External clamping diode, D ;  
x
External capacitor is charged to V level in the wait state, i.e. when no trigger is applied.  
CC  
If the supply voltage is turned off, C discharges mainly through the internal (parasitic) diode. If C is sufficiently large and V drops rapidly, there will be  
CC  
x
x
some possibility of damaging the IC through in rush current or latch-up. If the capacitance of the supply voltage filter is large enough and V drops slowly,  
CC  
the in rush current is automatically limited and damage to the IC is avoided.  
The maximum value of forward current through the parasitic diode is ±20 mA. In the case of a large Cx, the limit of fall time of the supply voltage is deter-  
mined as follows:  
t
(V 0.7) C /20 mA  
CC x  
f
(t is the time between the supply voltage turn off and the supply voltage reaching 0.4 V  
)
f
CC  
In the event a system does not satisfy the above condition, an external clamping diode (D ) is needed to protect the IC from rush current.  
x
System Diagram  
www.fairchildsemi.com  
2
Timing Chart  
Functional Description  
1. Stand-by State  
voltage VrefH, the output of C2 becomes LOW, the out-  
put Q goes LOW and C2 stops its operation. That  
The external capacitor (Cx) is fully charged to VCC in  
means, after triggering, when the voltage level of the  
Rx/Cx node reaches VrefH, the IC returns to its  
the Stand-by State. That means, before triggering, the  
QP and QN transistors which are connected to the Rx/  
MONOSTABLE state.  
Cx node are in the off state. Two comparators that  
relate to the timing of the output pulse, and two refer-  
ence voltage supplies turn off. The total supply current  
is only leakage current.  
With large values of Cx and Rx, and ignoring the dis-  
charge time of the capacitor and internal delays of the  
IC, the width of the output pulse, tW (OUT), is as fol-  
2. Trigger Operation  
lows:  
Trigger operation is effective in any of the following  
three cases. First, the condition where the A input is  
LOW, and B input has a rising signal; second, where  
the B input is HIGH, and the A input has a falling signal;  
and third, where the A input is LOW and the B input is  
HIGH, and the CLR input has a rising signal.  
tW (OUT) = 1.0 Cx Rx  
3. Retrigger operation (74VHC123A)  
When a new trigger is applied to either input A or B  
while in the MONOSTABLE state, it is effective only if  
the IC is charging Cx. The voltage level of the Rx/Cx  
node then falls to VrefL level again. Therefore the Q  
After a trigger becomes effective, comparators C1 and  
C2 start operating, and QN is turned on. The external  
capacitor discharges through QN. The voltage level at  
the Rx/Cx node drops. If the Rx/Cx voltage level falls to  
the internal reference voltage VrefL, the output of C1  
becomes LOW. The flip-flop is then reset and QN turns  
off. At that moment C1 stops but C2 continues operat-  
ing.  
output stays HIGH if the next trigger comes in before  
the time period set by Cx and Rx.  
If the new trigger is very close to a previous trigger,  
such as an occurrence during the discharge cycle, it  
will have no effect.  
The minimum time for a trigger to be effective 2nd trig-  
ger, tRR (Min), depends on VCC and Cx.  
4. Reset Operation  
After QN turns off, the voltage at the Rx/Cx node starts  
In normal operation, the CLR input is held HIGH. If  
CLR is LOW, a trigger has no affect because the Q out-  
put is held LOW and the trigger control F/F is reset.  
rising at a rate determined by the time constant of  
external capacitor Cx and resistor Rx.  
Upon triggering, output Q becomes HIGH, following  
some delay time of the internal F/F and gates. It stays  
HIGH even if the voltage of Rx/Cx changes from falling  
Also, Qp turns on and Cx is charged rapidly to VCC  
.
This means if CLR is set LOW, the IC goes into a wait  
state.  
to rising. When Rx/Cx reaches the internal reference  
3
www.fairchildsemi.com  
Absolute Maximum Ratings(Note 1)  
Recommended Operating  
Conditions (Note 2)  
Supply Voltage (VCC  
DC Input Voltage (VIN  
DC Output Voltage (VOUT  
Input Diode Current (IIK  
Output Diode Current (IOK  
DC Output Current (IOUT  
DC VCC/Current (ICC  
)
0.5V to +7.0V  
0.5V to +7.0V  
0.5 to VCC +0.5V  
20 mA  
)
Supply Voltage (VCC  
Input Voltage (VIN  
Output Voltage (VOUT  
Operating Temperature  
(Topr  
)
2.0V to +5.5V  
0V to +5.5V  
0V to VCC  
)
)
)
)
)
±20 mA  
)
±25 mA  
)
40° to +85°C  
)
±50 mA  
Input Rise and Fall Time (tr, tf)  
(CLR only)  
Storage Temperature (TSTG  
Lead Temperature (TL)  
Soldering, 10 seconds  
)
65°C to 150°C  
V
V
CC = 3.3V ± 0.3V  
CC = 5.0V ± 0.5V  
0
100 ns/V  
20 ns/V  
260°C  
0
External Capacitor - Cx  
External Resistor - Rx  
No Limitation (Note 3) F  
>5 k(Note 3) (VCC = 2.0V)  
>1 k(Note 3) (VCC > 3.0V)  
Note 1: Absolute maximum ratings are values beyond which the device  
may be damaged or have its useful life impaired. The databook specifica-  
tions should be met, without exception, to ensure that the system design is  
reliable over its power supply, temperature, and output/input loading vari-  
ables. Fairchild does not recommended operation outside data book speci-  
fications.  
Note 2: Unused inputs must be held HIGH or LOW. They may not float.  
Note 3: The maximum allowable values of C and R are a function of the  
x
x
leakage of capacitor C , the leakage of the device, and leakage due to  
x
board layout and surface resistance. Susceptibility to externally induced  
noise signals may occur for R > 1 M.  
x
DC Electrical Characteristics  
T
= 25°C  
T = −40° to 85°C  
A
V
(V)  
A
CC  
Symbol  
Parameter  
Units  
Conditions  
Min  
Typ  
Max  
Min  
Max  
V
V
V
HIGH Level  
2.0  
1.50  
1.50  
IH  
V
V
Input Voltage  
LOW Level  
3.0 5.5 0.7 V  
2.0  
0.7 V  
CC  
CC  
0.50  
0.50  
IL  
Input Voltage  
HIGH Level  
Output Voltage  
3.0 5.5  
0.3 V  
0.3 V  
CC  
CC  
2.0  
3.0  
1.9  
2.0  
3.0  
4.5  
1.9  
2.9  
V
V
= V  
I
= −50 µA  
OH  
IN  
IH  
OH  
2.9  
4.4  
V
V
or V  
IL  
4.5  
4.4  
3.0  
2.58  
3.94  
2.48  
3.80  
I
I
I
= −4 mA  
= −8 mA  
= 50 µA  
OH  
OH  
OL  
4.5  
V
LOW Level  
2.0  
0.0  
0.0  
0.0  
0.1  
0.1  
0.1  
0.1  
= V  
IN IH  
OL  
Output Voltage  
3.0  
or V  
IL  
4.5  
0.1  
0.1  
V
3.0  
0.36  
0.36  
±0.1  
±0.25  
0.44  
0.44  
±1.0  
±2.50  
I
I
= 4 mA  
= 8 mA  
OL  
OL  
4.5  
I
Input Leakage Current  
0 5.5  
5.5  
µA  
µA  
V
V
= 5.5V or GND  
IN  
IN  
I
R /C Terminal  
= V or GND  
CC  
IN  
x
x
IN  
Off-State Current  
Quiescent Supply Current  
Active—State  
I
5.5  
3.0  
4.5  
5.5  
4.0  
250  
500  
750  
40.0  
280  
650  
975  
µA  
µA  
V
= V or GND  
CC  
CC  
IN  
I
160  
380  
560  
V
= V or GND  
CC  
CC  
IN  
(Note 4)  
R /C = 0.5 V  
x x CC  
Supply Current  
Note 4: Per Circuit  
www.fairchildsemi.com  
4
AC Electrical Characteristics (Note 5)  
T
= 25°C  
T = −40°C to +85°C  
A
V
(V)  
A
CC  
Symbol  
Parameter  
Units  
Conditions  
= 15 pF  
Min  
Typ  
13.4  
15.9  
Max  
20.6  
24.1  
Min  
Max  
24.0  
27.5  
t
t
Propagation Delay Time 3.3 ± 0.3  
1.0  
C
PLH  
L
ns  
ns  
ns  
ns  
ns  
ns  
ns  
µs  
ms  
PHL  
1.0  
C
= 50 pF  
(A, B–Q, Q)  
L
5.0 ± 0.5  
8.1  
9.6  
12.0  
14.0  
22.4  
25.9  
1.0  
1.0  
1.0  
1.0  
14.0  
16.0  
26.0  
29.5  
C
C
C
C
= 15 pF  
= 50 pF  
= 15 pF  
= 50 pF  
L
L
L
L
t
t
Propagation Delay Time 3.3 ± 0.3  
14.5  
17.0  
PLH  
PHL  
(CLR Trigger—Q, Q \)  
5.0 ± 0.5  
8.7  
12.9  
14.9  
15.8  
19.3  
1.0  
1.0  
1.0  
1.0  
15.0  
17.0  
18.5  
22.0  
C
C
C
C
= 15 pF  
= 50 pF  
= 15 pF  
= 50 pF  
L
L
L
L
10.2  
10.3  
12.8  
t
t
Propagation Delay Time 3.3 ± 0.3  
PLH  
PHL  
(CLR—Q, Q)  
5.0 ± 0.5  
6.3  
7.8  
9.4  
11.4  
240  
200  
110  
110  
1.1  
1.0  
1.0  
11.0  
13.0  
300  
240  
110  
110  
1.1  
C
C
C
= 15 pF  
= 50 pF  
= 50 pF  
L
L
L
t
Output Pulse Width  
3.3 ± 0.3  
5.0 ± 0.5  
3.3 ± 0.3  
5.0 ± 0.5  
3.3 ± 0.3  
5.0 ± 0.5  
160  
133  
100  
100  
1.0  
C
R
C
R
C
R
= 28 pF  
= 2 kΩ  
WOUT  
x
x
x
x
x
x
90  
90  
90  
90  
C
= 50 pF  
= 50 pF  
= 0.01 µF  
= 10 kΩ  
= 0.1 µF  
= 10 kΩ  
L
L
0.9  
0.9  
0.9  
0.9  
C
1.0  
1.1  
1.1  
t  
Output Pulse Width Error  
Between Circuits  
(In same Package)  
Input Capacitance  
Power Dissipation  
Capacitance  
WOUT  
±1  
%
C
C
4
10  
10  
pF  
pF  
V
= Open  
IN  
CC  
73  
(Note 6)  
PD  
Note 5: Refer to Timing Chart.  
Note 6: C is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average  
PD  
operating current can be obtained by the equation:  
1
I
(opr.) = C *V *f  
I
*Duty/100 + I /2 (per Circuit)  
CC  
PD CC IN+ CC CC  
1
I
: Active Supply Current  
CC  
Duty:%  
AC Operating Requirement (Note 7)  
T
= 25°C  
T = −40°C to +85°C  
A
V
(V)  
A
CC  
Symbol  
Parameter  
Units  
Conditions  
Min  
5.0  
5.0  
5.0  
5.0  
Typ  
Max  
Min  
Max  
t
(L)  
(H)  
(L)  
Minimum Trigger  
3.3  
5.0  
5.0  
5.0  
5.0  
5.0  
W
ns  
ns  
t
Pulse Width  
Minimum Clear  
Pulse Width  
Minimum  
W
t
3.3  
W
5.0  
t
3.3 ± 0.3  
5.0 ± 0.5  
3.3  
60  
39  
ns  
R
C
R
C
= 1 kΩ  
RR  
x
Retrigger Time  
= 100 pF  
= 1 kΩ  
X
x
1.5  
1.2  
µs  
5.0  
= 0.01 µF  
X
Note 7: Refer to Timing Chart.  
5
www.fairchildsemi.com  
Device Characteristics  
twout*Cx Characteristics (typ)  
tRR*VCC Characteristics (typ)  
Output Pulse Width Constant K-Supply Voltage  
(Typical)  
Input Equivalent Circuit  
www.fairchildsemi.com  
6
Physical Dimensions inches (millimeters) unless otherwise noted  
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow  
Package Number M16A  
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide  
Package Number M16D  
7
www.fairchildsemi.com  
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)  
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide  
Package Number MTC16  
www.fairchildsemi.com  
8
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)  
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide  
Package Number N16E  
LIFE SUPPORT POLICY  
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT  
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD  
SEMICONDUCTOR CORPORATION. As used herein:  
1. Life support devices or systems are devices or systems  
which, (a) are intended for surgical implant into the  
body, or (b) support or sustain life, and (c) whose failure  
to perform when properly used in accordance with  
instructions for use provided in the labeling, can be rea-  
sonably expected to result in a significant injury to the  
user.  
2. A critical component in any component of a life support  
device or system whose failure to perform can be rea-  
sonably expected to cause the failure of the life support  
device or system, or to affect its safety or effectiveness.  
www.fairchildsemi.com  
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.  
配单直通车
74VHC123AMX产品参数
型号:74VHC123AMX
生命周期:Transferred
IHS 制造商:NATIONAL SEMICONDUCTOR CORP
包装说明:SOP,
Reach Compliance Code:unknown
HTS代码:8542.39.00.01
风险等级:5.62
Is Samacsys:N
其他特性:RETRIGGERABLE; TRIGGERABLE FROM CLEAR INPUT ALSO
系列:AHC/VHC
JESD-30 代码:R-PDSO-G16
长度:9.9 mm
负载电容(CL):50 pF
逻辑集成电路类型:MONOSTABLE MULTIVIBRATOR
数据/时钟输入次数:2
功能数量:2
端子数量:16
最高工作温度:85 °C
最低工作温度:-40 °C
输出极性:COMPLEMENTARY
封装主体材料:PLASTIC/EPOXY
封装代码:SOP
封装形状:RECTANGULAR
封装形式:SMALL OUTLINE
传播延迟(tpd):16 ns
认证状态:Not Qualified
座面最大高度:1.75 mm
最大供电电压 (Vsup):5.5 V
最小供电电压 (Vsup):2 V
标称供电电压 (Vsup):5 V
表面贴装:YES
技术:CMOS
温度等级:INDUSTRIAL
端子形式:GULL WING
端子节距:1.27 mm
端子位置:DUAL
宽度:3.9 mm
Base Number Matches:1
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