Datasheet

SN54AHC74, SN74AHC74
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH CLEAR AND PRESET
SCLS255J − DECEMBER 1995 − REVISED JULY 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
V
T
A
= 25°C SN54AHC74 SN74AHC74
UNIT
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
2 V 1.9 2 1.9 1.9
I
OH
= −50 mA
3 V 2.9 3 2.9 2.9
V
OH
I
OH
50
mA
4.5 V 4.4 4.5 4.4 4.4
V
V
OH
I
OH
= −4 mA 3 V 2.58 2.48 2.48
V
I
OH
= −8 mA 4.5 V 3.94 3.8 3.8
2 V 0.1 0.1 0.1
I
OL
= 50 mA
3 V 0.1 0.1 0.1
V
OL
I
OL
50
mA
4.5 V 0.1 0.1 0.1
V
V
OL
I
OL
= 4 mA 3 V 0.36 0.5 0.44
V
I
OL
= 8 mA 4.5 V 0.36 0.5 0.44
I
I
V
I
= 5.5 V or GND 0 V to 5.5 V ±0.1 ±1* ±1 mA
I
CC
V
I
= V
CC
or GND, I
O
= 0 5.5 V 2 20 20 m A
C
i
V
I
= V
CC
or GND 5 V 2 10 10 pF
* On products compliant to MIL-PRF-38535, this parameter is not production tested at V
CC
= 0 V.
timing requirements over recommended operating free-air temperature range, V
CC
= 3.3 V ± 0.3 V
(unless otherwise noted) (see Figure 1)
T
A
= 25°C SN54AHC74 SN74AHC74
UNIT
MIN MAX MIN MAX MIN MAX
UNIT
t
Pulse duration
PRE or CLR low 6 7 7
ns
t
w
Pulse duration
CLK
6 7 7
ns
t
Setup time before CLK↑
Data 6 7 7
ns
t
su
Setup time before CLK
↑
PRE or CLR inactive 5 5 5
ns
t
h
Hold time, data after CLK↑ 0.5 0.5 0.5 ns
timing requirements over recommended operating free-air temperature range, V
CC
= 5 V ± 0.5 V
(unless otherwise noted) (see Figure 1)
T
A
= 25°C SN54AHC74 SN74AHC74
UNIT
MIN MAX MIN MAX MIN MAX
UNIT
t
Pulse duration
PRE or CLR low 5 5 5
ns
t
w
Pulse duration
CLK
5 5 5
ns
t
Setup time before CLK↑
Data 5 5 5
ns
t
su
Setup time before CLK
↑
PRE or CLR inactive 3 3 3
ns
t
h
Hold time, data after CLK↑ 0.5 0.5 0.5 ns