74LS670 데이터 시트보기 (PDF) - ON Semiconductor
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74LS670 Datasheet PDF : 8 Pages
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AC CHARACTERISTICS (TA = 25°C)
Symbol
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPLZ
tPHZ
Parameter
Propagation Delay, RA or RB
to Output
Propagation Delay, EW to
Output
Propagation Delay, Data
to Output
Output Enable Time
Output Disable Time
AC SETUP REQUIREMENTS (TA = 25°C)
Symbol
tW
ts
ts
th
th
trec
Parameter
Pulse Width
Setup Time, (D)
Setup Time, (W)
Hold Time, (D)
Hold Time, (W)
Recovery Time
SN74LS670
Limits
Min Typ Max Unit
23
40
25
45
ns
26
28
45
50
ns
25
23
45
40
ns
15
22
35
40
ns
16
30
35
50
ns
Limits
Min Typ Max Unit
25
ns
10
ns
15
ns
15
ns
5.0
ns
25
ns
AC WAVEFORMS
Test Conditions
VCC = 5.0 V,
CL = 45 pF
CL = 5.0 pF
Test Conditions
VCC = 5.0 V
D, EW
Q
1.3 V
tPHL
1.3 V
1.3 V
tPLH
1.3 V
Figure 1.
RA, RB
Q
1.3 V
tPHL
1.3 V
1.3 V
tPLH
1.3 V
Figure 2.
WA, WB
D
EW
1.3 V
ts
tW
1.3 V
1.3 V
th
1.3 V 1.3 V
ts
th
1.3 V
Figure 3.
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