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DM74LS221SJX View Datasheet(PDF) - Fairchild Semiconductor

Part Name
Description
Manufacturer
DM74LS221SJX Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
Absolute Maximum Ratings(Note 3)
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range
65°C to +150°C
Note 3: The Absolute Maximum Ratingsare 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 Conditionstable will define the conditions
for actual device operation.
Recommended Operating Conditions
Symbol
Parameter
VCC
Supply Voltage
VT+
Positive-Going Input Threshold Voltage
at the A Input (VCC = Min)
VT
Negative-Going Input Threshold Voltage
at the A Input (VCC = Min)
VT+
Positive-Going Input Threshold Voltage
at the B Input (VCC = Min)
VT
Negative-Going Input Threshold Voltage
at the B Input (VCC = Min)
IOH
HIGH Level Output Current
IOL
LOW Level Output Current
tW
Pulse Width
(Note 4)
tREL
Clear Release Time (Note 4)
Rate of Rise or Fall of
Schmitt Input (B) (Note 4)
Rate of Rise or Fall of
Logic Input (A) (Note 4)
REXT
CEXT
DC
External Timing Resistor (Note 4)
External Timing Capacitance (Note 4)
Duty Cycle
(Note 4)
TA
Free Air Operating Temperature
Note 4: TA = 25°C and VCC = 5V.
Min
4.75
0.8
0.8
Data
40
Clear
40
15
1.4
0
RT = 2 k
RT = REXT (Max)
0
Nom
5
1
1
1
0.9
Max
Units
5.25
V
2
V
V
2
V
V
0.4
mA
8
mA
ns
ns
1
1
100
k
1000
µF
50
%
60
70
°C
www.fairchildsemi.com
4
 

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