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DM74ALS161B • DM74ALS162B • DM74ALS163B
Absolute Maximum Ratings(Note 1)
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Recommended Operating Conditions
Note 2: The symbol (↑) indicates that the rising edge of the clock is used as a reference.
Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range −65°C to +150°C
Typical θJA
N Package 78.1°C/W
M Package 106.8°C/W
Symbol Parameter Min Nom Max Units
V
CC
Supply Voltage 4.5 5 5.5 V
V
IH
HIGH Level Input Voltage 2 V
V
IL
LOW Level Input Voltage 0.8 V
I
OH
HIGH Level Output Current −0.4 mA
I
OL
LOW Level Output Current 8 mA
f
CLK
Clock Frequency 0 40 MHz
t
SETUP
Setup Time Data; A, B, C, D 15↑ (Note 2) ns
En P, En T DM74ALS161B 15↑ (Note 2) ns
DM74ALS162B
15↑ (Note 2) ns
DM74ALS163B
Load
15↑ (Note 2) ns
Clear
(Only for
DM74ALS162B and
DM74ALS163B)
LOW 15↑ (Note 2) ns
HIGH 12↑ (Note 2) ns
Setup 1 (Only for 161B) Clear
Inactive 10 4 ns
t
HOLD
Hold Time Data; A, B, C, D 0↑ (Note 2) −3ns
En P, En T 0↑ (Note 2) −3ns
Load
0↑ (Note 2) −4ns
Clear
(Only for DM74ALS162B and
DM74ALS163B
0↑ (Note 2) −7ns
Hold 0 (Only for 161B) Clear
0 −4ns
t
W
Width of Clock CLK HIGH or LOW 12.5 ns
or Clear
Pulse DM74ALS161B CLR LOW 15 ns
Width of Load
Pulse 15 ns
T
A
Operating Free Air Temperature 0 70 °C
