Datasheet
SDAS143C − APRIL 1982 − REVISED AUGUST 1995
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54AS74A SN74AS74A
UNIT
PARAMETER
TEST CONDITIONS
MIN TYP
†
MAX MIN TYP
†
MAX
UNIT
V
IK
V
CC
= 4.5 V, I
I
= −18 mA −1.2 −1.2 V
V
OH
V
CC
= 4.5 V to 5.5 V, I
OH
= −2 mA V
CC
−2 V
CC
−2 V
V
OL
V
CC
= 4.5 V, I
OL
= 20 mA 0.25 0.5 0.25 0.5 V
I
I
V
CC
= 5.5 V, V
I
= 7 V 0.1 0.1 mA
I
IH
CLK or D
V
CC
= 5.5 V,
V
I
= 2.7 V
20 20
A
I
IH
PRE or CLR
V
CC
= 5.5 V, V
I
= 2.7 V
40 40
µA
I
IL
CLK or D
V
CC
= 5.5 V,
V
I
= 0.4 V
−0.5 −0.5
mA
I
IL
PRE or CLR
V
CC
= 5.5 V, V
I
= 0.4 V
−1.8 −1.8
mA
I
O
‡
V
CC
= 5.5 V, V
O
= 2.25 V −30 −112 −30 −112 mA
I
CC
V
CC
= 5.5 V, See Note 1 10.5 16 10.5 16 mA
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.
‡
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
OS
.
NOTE 1: I
CC
is measured with D, CLK, and PRE
grounded, then with D, CLK, and CLR grounded.
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 4.5 V to 5.5 V,
C
L
= 50 pF,
R
L
= 500 Ω,
T
A
= MIN to MAX
§
UNIT
PARAMETER
(INPUT)
(OUTPUT)
SN54AS74A SN74AS74A
UNIT
MIN MAX MIN MAX
f
max
* 90 105 MHz
t
PLH
PRE or CLR
Q or Q
2 9 2 7.5
ns
t
PHL
PRE or CLR Q or Q
2.5 11.5 2.5 10.5
ns
t
PLH
CLK
Q or Q
2.5 10 3 8
ns
t
PHL
CLK
Q or Q
3.5 10.5 3 9
ns
* On products compliant to MIL-STD-833, Class B, this parameter is based on characterization data but is not production tested.
§
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.