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參數(shù)資料
| 型號： | JM38510 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT TRIGGER INPUTS |
| 中文描述： | 施密特觸發(fā)輸入與雙單穩(wěn)態(tài)多頻振蕩器 |
| 文件頁數(shù)： | 5/23頁 |
| 文件大?。?/td> | 620K |
| 代理商： | JM38510 |
SN54221, SN54LS221, SN74221, SN74LS221
DUAL MONOSTABLE MULTIVIBRATORS
WITH SCHMITT TRIGGER INPUTS
SDLS213B DECEMBER 1983 REVISED NOVEMBER 2004
13
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS (SN54/74221 ONLY)
Figure 3
Median
Relative
Frequency
of
Occurrence
DISTRIBUTION OF UNITS
FOR
OUTPUT PULSE
tw Output Pulse
VCC = 5 V
TA = 25°C
Median
+0.5%
Median
+0.5%
Figure 4
0
0.5
1
4.5
4.75
5
0.5
VARIATION IN OUTPUT PULSE
vs
SUPPLY VOLTAGE
1
5.25
5.5
V
ariation
in
Output
Pulse
%
t w
VCC Supply Voltage V
Cext = 60 pF
Rext = 10 k
TA = 25°C
tw ≈ 420 ns
at VCC = 5 V
Figure 5
25
50
75
0
0.5
1
025
50
V
ariation
in
Output
Pulse
%
0.5
VARIATION IN OUTPUT PULSE
vs
FREE-AIR TEMPERATURE
1
75
100
125
TA Free-Air Temperature °C
t w
VCC = 5 V
Cext = 60 pF
Rext = 10 k
tw ≈ 420 ns
at TA = 25°C
OUTPUT PULSE
vs
TIMING RESISTOR VALUE
Figure 6
100 ns
10 ns
12
4
7 10
10 ms
1 ms
20
40
70 100
Output
Pulse
t w
100
s
10
s
1
s
VCC = 5 V
TA = 25°C
F
Cext = 1
F
Cext = 0.1
F
Cext = 0.01
Cext = 1000 pF
Cext = 100 pF
Cext = 10 pF
See Note A
Rext Timing Resistor Value k
Data for temperatures below 0°C and above 70°C, and for supply voltages below 4.75 V and above 5.25 V are applicable for the SN54221 only.
NOTE A: These values of resistance exceed the maximum recommended for use over the full military temperature range of the SN54221.
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