www.fairchildsemi.com 4
DM74ALS174 • DM74ALS175
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
IN
= −18 mA −1.5 V
V
OH
HIGH Level I
OH
= −400 µA
V
CC
− 2V
CC
− 1.6 V
Output Voltage V
CC
= 4.5V to 5.5V
V
OL
LOW Level
V
CC
= 4.5V I
OL
= 8 mA 0.35 0.5 V
Output Voltage
I
I
Input Current at
V
CC
= 5.5V, V
IN
= 7V 0.1 mA
Max 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
IN
= 0.4V −0.1 mA
I
O
Output Drive Current V
CC
= 5.5V, V
O
= 2.25V −30 −112 mA
I
CC
Supply Current V
CC
= 5.5V
DM74ALS174 11 19
Clock = 4.5V
mA
Clear = GND
DM74ALS175 8 14
D Input = GND
Symbol Parameter Conditions Min Max Units
f
MAX
Maximum Clock Frequency R
L
= 500Ω 50 MHz
t
PLH
Propagation Delay Time C
L
= 50 pF
LOW-to-HIGH Level V
CC
= 4.5V to 5.5V 5 18 ns
Output From Clear (175 Only)
t
PHL
Propagation Delay Time
HIGH-to-LOW Level 8 23 ns
Output From Clear
t
PLH
Propagation Delay Time
LOW-to-HIGH Level 3 15 ns
Output From Clock
t
PHL
Propagation Delay Time
HIGH-to-LOW Level 5 17 ns
Output From Clock
