SN74LS377 データシートの表示（PDF） - Motorola => Freescale
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SN74LS377
Motorola => Freescale
SN74LS377 Datasheet PDF : 7 Pages
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SN54/74LS377 • SN54/74LS378 • SN54/74LS379
TRUTH TABLE
E
CP
Dn
Qn
Qn
H
X
No
No
Change Change
L
H
H
L
L
L
L
H
L = LOW Voltage Level
H = HIGH Voltage Level
X = Immaterial
AC WAVEFORMS
CP
D OR E
Q
SN54 / 74LS377
1.3 V
ts(H)
*
1.3 V
1/fmax
tW
ts(L)
th(H)
tPLH
1.3 V
1.3 V
th(L)
1.3 V
tPHL
1.3 V
Figure 1. Clock to Output Delays Clock Pulse
Width, Frequency, Setup and Hold Times Data
or Enable to Clock
CP
E, D
Q
SN54 / 74LS378
1.3 V
ts(H)
1/fmax
tW
ts(L)
th(H)
*
1.3 V
tPHL
1.3 V
1.3 V
th(L)
1.3 V
tPLH
1.3 V
Figure 2. Clock to Output Delays Clock Pulse
Width, Frequency, Setup and Hold Times Data
or Enable to Clock
CP
E, D
Q
SN54 / 74LS379
1.3 V
ts(H)
*
1.3 V
1/fmax
tW
ts(L)
th(H)
tPLH
1.3 V
1.3 V
th(L)
1.3 V
tPHL
1.3 V
*The shaded areas indicate when the input is permitted to change for predictable output performance.
Figure 3. Clock to Output Delays Clock Pulse
Width, Frequency, Setup and Hold Times Data,
Enable to Clock
FAST AND LS TTL DATA
5-537
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