Datasheet
SN54AHC74, SN74AHC74
www.ti.com
SCLS255K –DECEMBER 1995–REVISED DECEMBER 2013
Switching Characteristics
over recommended operating free-air temperature range, V
CC
= 3.3 V ± 0.5 V (unless otherwise noted) (see Figure 1)
–40°C to –40°C to
T
A
= 25°C SN54AHC74 85°C 125°C
FROM TO LOAD
PARAMETER UNIT
SN74AHC74 SN74AHC74
(INPUT) (OUTPUT) CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX MIN MAX
C
L
= 15 pF 80
(1)
125
(1)
70
(1)
70 70
f
max
MHz
C
L
= 50 pF 50 75 45 45 45
t
PLH
7.6
(1)
12.3
(1)
1
(1)
14.5
(1)
1 14.5 1 14.5
PRE or CLR Q or Q C
L
= 15 pF ns
t
PHL
7.6 12.3 1
(1)
14.5
(1)
1 14.5 1 14.5
t
PLH
6.7 11.9 1
(1)
14
(1)
1 14 1 14
CLK Q or Q C
L
= 15 pF ns
t
PHL
6.7 11.9 1
(1)
14
(1)
1 14 1 14
t
PLH
10.1 15.8 1 18 1 18 1 18
PRE or CLR Q or Q C
L
= 50 pF ns
t
PHL
10.1 15.8 1 18 1 18 1 18
t
PLH
9.2 15.4 1 17.5 1 17.5 1 17.5
CLK Q or Q C
L
= 50 pF ns
t
PHL
9.2 15.4 1 17.5 1 17.5 1 17.5
(1) On products compliant to MIL-PRF-38535, this parameter is not production tested.
Switching Characteristics
over recommended operating free-air temperature range, V
CC
= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
–40°C to –40°C to
T
A
= 25°C SN54AHC74 85°C 125°C
FROM TO LOAD
PARAMETER UNIT
SN74AHC74 SN74AHC74
(INPUT) (OUTPUT) CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX MIN MAX
C
L
= 15 pF 130
(1)
170
(1)
110
(1)
110 110
f
max
MHz
C
L
= 50 pF 90 115 75 75 75
t
PLH
4.8
(1)
7.7
(1)
1
(1)
9
(1)
1 9 1 9
PRE or CLR Q or Q C
L
= 15 pF ns
t
PHL
4.8
(1)
7.7
(1)
1
(1)
9
(1)
1 9 1 9
t
PLH
4.6
(1)
7.3
(1)
1
(1)
8.5
(1)
1 8.5 1 8.5
CLK Q or Q C
L
= 15 pF ns
t
PHL
4.6
(1)
7.3
(1)
1
(1)
8.5
(1)
1 8.5 1 8.5
t
PLH
6.3 9.7 1 11 1 11 1 11
PRE or CLR Q or Q C
L
= 50 pF ns
t
PHL
6.3 9.7 1 11 1 11 1 11
t
PLH
6.1 9.3 1 10.5 1 10.5 1 10.5
CLK Q or Q C
L
= 50 pF ns
t
PHL
6.1 9.3 1 10.5 1 10.5 1 10.5
(1) On products compliant to MIL-PRF-38535, this parameter is not production tested.
Noise Characteristics
V
CC
= 5 V, C
L
= 50 pF, T
A
= 25°C (see
(1)
)
SN74AHCT74
PARAMETER UNIT
MIN MAX
V
OL(P)
Quiet output, maximum dynamic V
OL
0.8 V
V
OL(V)
Quiet output, minimum dynamic V
OL
–0.8 V
V
OH(V)
Quiet output, minimum dynamic V
OH
4.7 V
V
IH(D)
High-level dynamic input voltage 3.5 V
V
IL(D)
Low-level dynamic input voltage 1.5 V
(1) Characteristics are for surface-mount packages only.
Operating Characteristics
V
CC
= 5 V, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance No load, f = 1 MHz 32 pF
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