Philips Semiconductors
Product specification
Octal D-type flip-flop with reset;
positive-edge trigger
74HC/HCT273
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
74HC
SYMBOL PARAMETER
UNIT
WAVEFORMS
VCC
(V)
+25
−40 to +85 −40 to +125
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
CP to Qn
41
15
13
150
30
26
185
37
31
225
45
38
ns
ns
ns
ns
ns
ns
ns
ns
2.0 Fig.6
4.5
6.0
tPHL
propagation delay
MR to Qn
44
16
14
150
30
26
185
37
31
225
45
38
2.0 Fig.7
4.5
6.0
t
THL/ tTLH output transition time
19
7
6
75
15
13
95
19
15
110
22
19
2.0 Fig.6
4.5
6.0
tW
tW
trem
tsu
th
clock pulse width
HIGH or LOW
80
16
14
14
5
4
100
20
17
120
24
20
2.0 Fig.6
4.5
6.0
master reset pulse width 60
LOW
17
6
5
75
15
13
90
18
15
2.0 Fig.7
4.5
6.0
12
10
removal time
MR to CP
50
10
9
−6
−2
−2
65
13
11
75
15
13
2.0 Fig.7
4.5
6.0
set-up time
Dn to CP
60
12
10
11
4
3
75
15
13
90
18
15
2.0 Fig.8
4.5
6.0
hold time
Dn to CP
3
3
3
−6
−2
−2
3
3
3
3
3
3
2.0 Fig.8
4.5
6.0
fmax
maximum clock pulse
frequency
6.0
30
35
20.6
103
122
4.8
24
28
4.0
20
24
MHz 2.0 Fig.6
4.5
6.0
September 1993
5
NXP [ NXP ]
