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零件编号
产品描述 (功能)
SN74LS670 查看數據表(PDF) - ON Semiconductor
零件编号
产品描述 (功能)
生产厂家
SN74LS670
4 x 4 Register File with 3-State Outputs
ON Semiconductor
SN74LS670 Datasheet PDF : 8 Pages
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AC CHARACTERISTICS
(T
A
= 25
°
C)
Symbol
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PLZ
t
PHZ
Parameter
Propagation Delay, R
A
or R
B
to Output
Propagation Delay, E
W
to
Output
Propagation Delay, Data
to Output
Output Enable Time
Output Disable Time
AC SETUP REQUIREMENTS
(T
A
= 25
°
C)
Symbol
t
W
t
s
t
s
t
h
t
h
t
rec
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
V
CC
= 5.0 V,
C
L
= 45 pF
C
L
= 5.0 pF
Test Conditions
V
CC
= 5.0 V
D, E
W
Q
1.3 V
t
PHL
1.3 V
1.3 V
t
PLH
1.3 V
Figure 1.
R
A
, R
B
Q
1.3 V
t
PHL
1.3 V
1.3 V
t
PLH
1.3 V
Figure 2.
W
A
, W
B
D
E
W
1.3 V
t
s
t
W
1.3 V
1.3 V
t
h
1.3 V 1.3 V
t
s
t
h
1.3 V
Figure 3.
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