Datasheet
SCAS521F − AUGUST 1995 − REVISED OCTOBER 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
CC
T
A
= 25°C SN54AC74 SN74AC74
UNIT
PARAMETER
TEST CONDITIONS
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
3 V 2.9 4.49 2.9 2.9
I
OH
= −50 µA
4.5 V 4.4 5.49 4.4 4.4
I
OH
= −50 µA
5.5 V 5.4 5.49 5.4 5.4
V
OH
I
OH
= −12 mA 3 V 2.56 2.4 2.46
V
V
OH
I
OH
= −24 mA
4.5 V 3.86 3.7 3.76
V
I
OH
= −24 mA
5.5 V 4.86 4.7 4.76
I
OH
= −50 mA
†
5.5 V 3.85
I
OH
= −75 mA
†
5.5 V 3.85
3 V 0.002 0.1 0.1 0.1
I
OL
= 50 µA
4.5 V 0.001 0.1 0.1 0.1
I
OL
= 50 µA
5.5 V 0.001 0.1 0.1 0.1
V
OL
I
OL
= 12 mA 3 V 0.36 0.5 0.44
V
V
OL
I
OL
= 24 mA
4.5 V 0.36 0.5 0.44
V
I
OL
= 24 mA
5.5 V 0.36 0.5 0.44
I
OL
= 50 mA
†
5.5 V 1.65
I
OL
= 75 mA
†
5.5 V 1.65
I
I
Data pins
V
I
= V
CC
or GND
5.5 V
±0.1 ±1 ±1
A
I
I
Control pins
V
I
= V
CC
or GND 5.5 V
±0.1 ±1 ±1
µA
I
CC
V
I
= V
CC
or GND, I
O
= 0 5.5 V 2 40 20 µA
C
i
V
I
= V
CC
or GND 5 V 3 pF
†
Not more than one output should be tested at a time, and the duration of the test should not exceed 2 ms.
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 SN54AC74 SN74AC74
UNIT
MIN MAX MIN MAX MIN MAX
UNIT
f
clock
Clock frequency 100 70 95 MHz
t
w
Pulse duration
PRE or CLR low 5.5 8 7
ns
t
w
Pulse duration
CLK
5.5 8 7
ns
t
su
Setup time, data before CLK↑
Data 4 5 4.5
ns
t
su
Setup time, data before CLK↑
PRE
or CLR inactive 0 0.5 0
ns
t
h
Hold time, data after CLK↑ 0.5 0.5 0.5 ns