74HCT74 查看數據表（PDF） - Philips Electronics
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74HCT74 Datasheet PDF : 22 Pages
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Philips Semiconductors
Dual D-type flip-flop with set and reset;
positive-edge trigger
Product specification
74HC74; 74HCT74
AC CHARACTERISTICS
Family 74HC
GND = 0 V; tr = tf = 6 ns; CL = 50 pF.
SYMBOL
PARAMETER
TEST CONDITIONS
WAVEFORMS
VCC (V)
MIN.
Tamb = −40 to +85 °C
tPHL/tPLH
propagation delay
nCP to nQ, nQ
see Fig.7
2.0
−
4.5
−
6.0
−
propagation delay
nSD to nQ, nQ
see Fig.8
2.0
−
4.5
−
6.0
−
propagation delay
nRD to nQ, nQ
see Fig.8
2.0
−
4.5
−
6.0
−
tTHL/tTLH
output transition time see Fig.7
2.0
−
4.5
−
6.0
−
tW
clock pulse width
see Fig.7
HIGH or LOW
2.0
100
4.5
20
6.0
17
set or reset pulse width see Fig.8
LOW
2.0
100
4.5
20
6.0
17
trem
removal time set or
see Fig.8
reset
2.0
40
4.5
8
6.0
7
tsu
set-up time nD to nCP see Fig.7
2.0
75
4.5
15
6.0
13
th
hold time nCP to nD see Fig.7
2.0
3
4.5
3
6.0
3
fmax
maximum clock pulse see Fig.7
frequency
2.0
4.8
4.5
24
6.0
28
TYP.
47
17
14
50
18
14
52
19
15
19
7
6
19
7
6
19
7
6
3
1
1
6
2
2
−6
−2
−2
23
69
82
MAX.
220
44
37
250
50
43
250
50
43
95
19
16
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
MHz
MHz
2003 Jul 10
10
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