74HCT74 Philips, 74HCT74 Datasheet - Page 6

• Manufacturer Part Number: 74HCT74
• Description: Dual D-type flip-flop with set and reset; positive-edge trigger
• Manufacturer: Philips

Philips Semiconductors
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
Output capability: standard
I
Note to HCT types
The value of additional quiescent supply current ( I
To determine I
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
1998 Feb 23
CC
INPUT
nD
nR
nS
nCP
SYMBOL PARAMETER
t
t
t
t
t
t
t
t
t
f
PHL
PHL
PHL
THL
W
W
rem
su
h
max
Dual D-type flip-flop with set and reset;
positive-edge trigger
D
category: flip-flops
D
/ t
/ t
/ t
/ t
TLH
PLH
PLH
PLH
r
propagation delay
propagation delay
propagation delay
output transition time
clock pulse width
set or reset pulse width
removal time
set-up time
hold time
maximum clock pulse
LOW
nCP to nQ, nQ
nS
nR
HIGH or LOW
set or reset
nD to nCP
nCP to nD
frequency
= t
CC
0.70
0.70
0.80
0.80
f
D
D
= 6 ns; C
UNIT LOAD COEFFICIENT
to nQ, nQ
to nQ, nQ
per input, multiply this value by the unit load coefficient shown in the table below.
L
= 50 pF
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
18
16
6
12
3
27
min.
18
23
24
7
9
9
1
5
54
typ.
3
25
CC
35
40
40
15
max. min. max. min. max.
) for a unit load of 1 is given in the family specifications.
T
6
74HCT
amb
23
20
8
15
3
22
40 to 85
( C)
44
50
50
19
27
24
9
18
3
18
40 to 125
53
60
60
22
.
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
UNIT
74HC/HCT74
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
V
TEST CONDITIONS
(V)
Product specification
CC
WAVEFORMS
Fig.6
Fig.7
Fig.7
Fig.6
Fig.6
Fig.7
Fig.7
Fig.6
Fig.6
Fig.6