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參數(shù)資料
| 型號： | MC1455 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Timing Circuit |
| 中文描述： | 時序電路 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 147K |
| 代理商： | MC1455 |
MC1455, MC1455B, NCV1455B
http://onsemi.com
8
Pulse Width Modulation
If the timer is triggered with a continuous pulse train in the
monostable mode of operation, the charge time of the
capacitor can be varied by changing the control voltage at
Pin 5. In this manner, the output pulse width can be
modulated by applying a modulating signal that controls the
threshold voltage.
Figure 24. Pulse Width Modulator
+V
CC
(5.0 V to 15 V)
R
L
Output
Clock
Input
Modulation
Input
C
7
6
5
R
A
4
8
3
2
1
MC1455
t = 0.5
ms/cm
(R
A
= 10 k , C = 0.02 F, V
CC
= 15 V)
Figure 25. Pulse Width Modulation Waveforms
Test Sequences
Several timers can be connected to drive each other for
sequential timing. An example is shown in Figure 26 where
the sequence is started by triggering the first timer which
runs for 10 ms. The output then switches low momentarily
and starts the second timer which runs for 50 ms and so forth.
Figure 26. Sequential Timer
Load
MC1455
6
7
2
8
4
5
3
27 k
1
5.0 F
Load
MC1455
9.1 k
6
7
1.0 F
2
8
4
5
3
0.01 F
27 k
1
0.001 F
5.0 F
MC1455
6
7
2
8
4
5
3
1
Load
0.001 F
18.2 k
9.1 k
0.01 F
0.01 F
V
CC
(5.0 V to 15 V)
DEVICE ORDERING INFORMATION
Device
Operating Temperature Range
Package
Shipping
MC1455P1
T
A
= 0
°
C to +70
°
C
Plastic Dip
50 Units/Rail
MC1455D
T
A
= 0
°
C to +70
°
C
SO8
98 Units/Rail
MC1455BD
T
A
= 40
°
C to +85
°
C
SO8
98 Units/Rail
MC1455BP1
T
A
= 40
°
C to +85
°
C
Plastic Dip
50 Units/Rail
NCV1455BDR2*
T
A
= 40
°
C to +125
°
C
SO8
2500/Tape & Rail
*NCV prefix is for automotive and other applications requiring site and control changes.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC1455BD | Timing Circuit |
| MC1455BP1 | Timing Circuit |
| MC1455D | Timing Circuit |
| MC1455P1 | Timing Circuit |
| MC1455BP1 | Timing Circuits |
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| MC145503DWR2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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| MC145505DWR2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
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