HD74LS374 查看數據表（PDF） - Renesas Electronics
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HD74LS374 Datasheet PDF : 8 Pages
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HD74LS374
Function Table
Inputs
Output control
Clock
D
L
↑
H
L
↑
L
L
L
X
H
X
X
Notes: H; high level, L; low level, X; irrelevant
↑; transition from low to high level
Q0; level of Q before the indicated steady state input conditions were established
Z; off (high-impedance) state of a three state output
Block Diagram
1Q
2Q
3Q
4Q
5Q
6Q
7Q
Outputs
Q
H
L
Q0
Z
8Q
Q
Q
Q
Q
Q
Q
Q
Q
D CK D CK D CK D CK D CK D CK D CK D CK
Output 1D
2D
3D
4D
5D
6D
7D
8D Clock
Control
Absolute Maximum Ratings
Item
Symbol
Ratings
Supply voltage
VCC
7
Input voltage
VIN
7
Power dissipation
PT
400
Storage temperature
Tstg
–65 to +150
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Recommended Operating Conditions
Item
Symbol
Min
Supply voltage
VCC
4.75
Output voltage
VOH
—
Output current
IOH
—
IOL
—
Operating temperature
Topr
–20
“H” Level
15
Clock pulse width
tw
“L” Level
15
Data setup time
Data hold time
tsu
20↑
th
0↑
Typ
Max
5.00
5.25
—
5.5
—
–2.6
—
24
25
75
—
—
—
—
—
—
—
—
Unit
V
V
mW
°C
Unit
V
V
mA
mA
°C
ns
ns
ns
ns
Rev.2.00, Feb.18.2005, page 2 of 7
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