參數(shù)資料
型號： DM74LS393MX
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類： 通用總線功能
英文描述： Asynchronous Up/Down Counter
中文描述： LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, PDSO14
封裝： 0.150 INCH, MS-012, SOIC-14
文件頁數(shù)： 3/6頁
文件大小： 56K
代理商： DM74LS393MX
3
www.fairchildsemi.com
D
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:
C
L
=
15 pF, R
L
=
2 k
, T
A
=
25
°
C and V
CC
=
5V.
Note 3:
C
L
=
50 pF, R
L
=
2 k
, T
A
=
25
°
C and V
CC
=
5V.
Note 4:
The symbol (
↓
) indicates that the falling edge of the clear pulse is used for reference.
Note 5:
T
A
=
25
°
C, and V
CC
=
5V.
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Note 6:
All typicals are at V
CC
=
5V, T
A
=
25
°
C.
Note 7:
Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 8:
I
CC
is measured with all outputs open, both CLEAR inputs grounded following momentary connection to 4.5V, and all other inputs grounded.
Supply Voltage
Input Voltage
Clear
A
Operating Free Air Temperature Range
Storage Temperature Range
7V
7V
5.5V
0
°
C to
+
70
°
C
65
°
C to
+
150
°
C
Symbol
Parameter
Min
4.75
2
Nom
5
Max
5.25
Units
V
V
V
mA
mA
MHz
MHz
V
CC
V
IH
V
IL
I
OH
I
OL
f
CLK
f
CLK
t
W
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Clock Frequency (Note 2)
Clock Frequency (Note 3)
Pulse Width (Note 5)
0.8
0.4
8
25
20
0
0
A
Clear HIGH
20
20
25
↓
0
ns
t
REL
T
A
Clear Release Time (Note 4)(Note 5)
Free Air Operating Temperature
ns
°
C
70
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 6)
V
I
V
OH
Input Clamp Voltage
HIGH Level
Output Voltage
V
CC
=
Min, I
I
=
18 mA
V
CC
=
Min, I
OH
=
Max
V
IL
=
Max, V
IH
=
Min
V
CC
=
Min, I
OL
=
Max
V
IL
=
Max, V
IH
=
Min
I
OL
=
4 mA, V
CC
=
Min
V
CC
=
Max, V
I
=
7V
V
CC
=
Max, V
I
=
5.5V
V
CC
=
Max, V
I
=
2.7V
1.5
V
2.7
3.4
V
V
OL
LOW Level
Output Voltage
0.35
0.5
V
0.25
0.4
I
I
Input Current @ Max
Input Voltage
HIGH Level
Clear
A
Clear
0.1
0.2
20
mA
I
IH
μ
A
Input Current
LOW Level
Input Current
A
Clear
A
40
0.4
1.6
100
26
I
IL
V
CC
=
Max, V
I
=
0.4V
mA
I
OS
I
CC
Short Circuit Output Current
Supply Current
V
CC
=
Max (Note 7)
V
CC
=
Max (Note 8)
20
mA
mA
15
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