Datasheet
SCAS520H − AUGUST 1995 − REVISED OCTOBER 2003
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature (unless otherwise
noted) (see Figure 1)
FROM
TO
SN74ACT74
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
T
A
= 25°C
MIN
MAX
UNIT
PARAMETER
(INPUT)
(OUTPUT)
MIN TYP MAX
MIN
MAX
UNIT
f
max
145 210 125 MHz
t
PLH
PRE or CLR
Q or Q
3 5.5 9.5 2.5 10.5
ns
t
PHL
PRE or CLR Q or Q
3 6 10 3 11.5
ns
t
PLH
CLK
Q or Q
4 7.5 11 4 13
ns
t
PHL
CLK
Q or Q
3.5 6 10 3 11.5
ns
operating characteristics, V
CC
= 5 V, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance C
L
= 50 pF, f = 1 MHz 45 pF
PARAMETER MEASUREMENT INFORMATION
50% V
CC
3 V
3 V
0 V
0 V
t
h
t
su
VOLTAGE WAVEFORMS
Data Input
t
PLH
t
PHL
t
PHL
t
PLH
V
OH
V
OH
V
OL
V
OL
3 V
0 V
50% V
CC
50% V
CC
Input
Out-of-Phase
Output
In-Phase
Output
Timing Input
50% V
CC
VOLTAGE WAVEFORMS
t
PLH
/t
PHL
Open
TEST S1
3 V
0 V
t
w
VOLTAGE WAVEFORMS
Input
NOTES: A. C
L
includes probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, Z
O
= 50 Ω, t
r
≤ 2.5 ns, t
f
≤ 2.5 ns.
C. The outputs are measured one at a time with one input transition per measurement.
LOAD CIRCUIT
From Output
Under Test
C
L
= 50 pF
(see Note A)
S1
2 × V
CC
500 Ω
500 Ω
Open
1.5 V 1.5 V
1.5 V 1.5 V
1.5 V
1.5 V
1.5 V
Figure 1. Load Circuit and Voltage Waveforms