IN74HC157A 查看數據表（PDF） - IK Semicon Co., Ltd
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IN74HC157A Datasheet PDF : 6 Pages
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IN74HC157A
AC ELECTRICAL CHARACTERISTICS (CL=50pF,Input tr=tf=6.0 ns)
VCC
Guaranteed Limit
Symbol
Parameter
V 25 °C to ≤85°C ≤125°C Unit
-55°C
tPLH, tPHL Maximum Propagation Delay, Input A or B to
2.0 105
130
160
ns
Output Y (Figures 1and 4)
4.5 21
26
32
6.0 18
22
27
tPLH, tPHL Maximum Propagation Delay , Select to
Output Y (Figures 2 and 4)
2.0 110
140
165
ns
4.5 22
28
33
6.0 19
24
28
tPLH, tPHL Maximum Propagation Delay , Output Enable to 2.0 100
125
150
ns
Output Y (Figures 3 and 4)
4.5 20
25
30
6.0 17
21
26
tTLH, tTHL Maximum Output Transition Time, Any Output
2.0
75
(Figures 1 and 4)
4.5 15
6.0 13
95
110
ns
19
22
16
19
CIN Maximum Input Capacitance
-
10
10
10
pF
Power Dissipation Capacitance (Per Package)
CPD Used to determine the no-load dynamic power
consumption:
PD=CPDVCC2f+ICCVCC
Typical @25°C,VCC=5.0 V
33
pF
Figure 1. Switching Waveforms
Figure 2. Switching Waveforms
Figure 3. Switching Waveforms
Figure 4. Test Circuit
Rev. 00
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