www.fairchildsemi.com 4
DM74ALS874B
Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at V
CC
= 5V, T
A
= 25°C.
Switching Characteristics
over recommended operating free air temperature range.
Symbol Parameter Conditions Min Typ Max Units
V
IK
Input Clamp Voltage V
CC
= 4.5V, I
I
= −18 mA −1.2 V
V
OH
HIGH Level V
CC
= 4.5V I
OH
= Max
2.4 3.2 V
Output Voltage V
IL
= V
IL
Max
V
CC
= 4.5V to 5.5V I
OH
= −400 µAV
CC
− 2V
V
OL
LOW Level V
CC
= 4.5V I
OL
= 12 mA
0.25 0.4 V
Output Voltage V
IH
= 2V
I
OL
= 24 mA 0.35 0.5 V
I
I
Input Current @ Maximum V
CC
= 5.5V, V
IH
= 7V
0.1 mA
Input Voltage
I
IH
HIGH Level Input Current V
CC
= 5.5V, V
IH
= 2.7V 20 µA
I
IL
LOW Level Input Current V
CC
= 5.5V, V
IL
= 0.4V −0.2 mA
I
O
Output Drive Current V
CC
= 5.5V, V
O
= 2.25V −30 −112 mA
I
OZH
OFF-State Output Current V
CC
= 5.5V, V
IH
= 2V
20 µA
HIGH Level Voltage Applied V
O
= 2.7V
I
OZL
OFF-State Output Current V
CC
= 5.5V, V
IH
= 2V
−20 µA
LOW Level Voltage Applied V
O
= 0.4V
I
CC
Supply Current V
CC
= 5.5V Outputs HIGH 14 21 mA
Outputs OPEN Outputs LOW 19 30 mA
Outputs Disabled 20 32 mA
Symbol Parameter Conditions From To Min Max Units
f
MAX
Maximum Clock Frequency V
CC
= 4.5V to 5.5V 30 MHz
t
PLH
Propagation Delay Time R
L
= 500,Ω,
Clock Any Q 4 14 ns
LOW-to-HIGH Level Output C
L
= 50 pF
t
PHL
Propagation Delay Time
Clock Any Q 4 14 ns
HIGH-to-LOW Level Output
t
PZH
Output Enable Time Output
Any Q 4 18 ns
to HIGH Level Output Control
t
PZL
Output Enable Time Output
Any Q 4 18 ns
to LOW Level Output Control
t
PHZ
Output Disable Time Output
Any Q 2 10 ns
from HIGH Level Output Control
t
PLZ
Output Disable Time Output
Any Q 3 12 ns
from LOW Level Output Control
t
PHL
Propagation Delay Time
Clear Any Q 5 17 ns
HIGH-to-LOW Level Output
