HD74LS293 查看數據表（PDF） - Renesas Electronics
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HD74LS293 Datasheet PDF : 8 Pages
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HD74LS293
Switching Characteristics
Item
Symbol Inputs Outputs
min.
typ.
Maximum count
A
frequency
ƒmax
B
QA
32
42
QB
16
—
tPLH
A
tPHL
QA
—
10
—
12
tPLH
A
tPHL
QD
—
46
—
46
Propagation delay
tPLH
B
time
tPHL
QB
—
10
—
14
tPLH
B
tPHL
QC
—
21
—
23
tPLH
B
tPHL
QD
—
34
—
34
tPHL
Set-to-0 QA to QD
—
26
Timing Method
tw
R0
1.3 V
A or B
Input
1.3 V
tsu
1.3 V
tw
1.3 V
max.
—
—
16
18
70
70
16
21
32
35
51
51
40
(VCC = 5 V, Ta = 25°C)
Unit
Condition
MHz
ns
ns
CL = 15 pF,
ns
RL = 2 kΩ
ns
ns
ns
3V
0V
3V
0V
Rev.3.00, Jul.15.2005, page 4 of 7
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