MM74HC595 查看數據表（PDF） - Fairchild Semiconductor
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MM74HC595 Datasheet PDF : 14 Pages
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AC Electrical Characteristics
VCC = 5V, TA = 25°C, tr = tf = 6ns.
Symbol
Parameter
Conditions Typ. Guaranteed Limit Units
fMAX Maximum Operating Frequency of SCK
50
30
MHz
Maximum Propagation Delay, SCK to Q’H
12
20
tPHL,tPLH Maximum Propagation Delay, RCK to QA CL=45pF
thru Q’H
18
30
ns
tPZH,tPZL
Maximum Output Enable Time from G to
QA thru Q’H
RL=1kΩ, CL=45pF
17
28
ns
tPHZ,tPLZ
Maximum Output Disable Time from G to
QA thru Q’H
RL=1kΩ, CL=45pF
15
25
ns
Minimum Setup Time from SER to SCK
20
ns
tS
Minimum Setup Time from SCLR to SCK
Minimum Setup Time from SER to
RCK(4)
20
ns
40
ns
tH
Minimum Hold Time from SER to SCK
0
ns
tW
Minimum Pulse Width of SCK or RCK
16
ns
Note:
4. This setup time ensures the register will see stable data from the shift-register outputs. The clocks may be
connected together in which case the storage register state will be one clock pulse behind the shift register.
© 1983 Fairchild Semiconductor Corporation
MM74HC595 • Rev. 1.0.2
6
www.fairchildsemi.com
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