参数资料
| 型号： | LM555CN |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 13/13页 |
| 文件大小： | 0K |
| 描述： | IC OSC MONO TIMING 8-DIP |
| 标准包装： | 50 |
| 类型： | 555 型，计时器/振荡器（单路） |
| 电源电压： | 4.5 V ~ 16 V |
| 电流 - 电源： | 7.5mA |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 供应商设备封装： | 8-DIP |
| 安装类型： | 通孔 |
| 产品目录页面： | 1220 (CN2011-ZH PDF) |
| 其它名称： | LM555CNFS |
LM555
—
Single
T
imer
2002 Fairchild Semiconductor Corporation
www.fairchildsemi.com
LM555 Rev. 1.1.0
9
5. Pulse Position Modulation
If the modulating signal is applied to the control terminal while the timer is connected for the astable operation, as in
Figure 12, the timer becomes a pulse position modulator.
In the pulse position modulator, the reference of the timer's internal comparators is modulated, which modulates the
timer output according to the modulation signal applied to the control terminal.
Figure 13 illustrates a sine wave for modulation signal and the resulting output pulse position modulation; however, any
wave shape be used
.
6. Linear Ramp
When the pull-up resistor RA in the monostable circuit shown in Figure 2 is replaced with constant current source, the
VC1 increases linearly, generating a linear ramp. Figure 14 shows the linear ramp generating circuit and Figure 15 illus-
trates the generated linear ramp waveforms.
Figure 12. Circuit for Pulse Position Modluation
Figure 13. Wafeforms of pulse position modulation
Figure 14. Circuit for Linear Ramp
Figure 15. Waveforms of Linear Ramp
8
4
7
1
2
3
5
6
CONT
GND
Vcc
DISCH
THRES
RESET
TRIG
OUT
+Vcc
R
A
C
R
B
Modulation
Output
1
5
6
7
8
4
2
3
RESET
Vcc
DISCH
THRES
CONT
GND
OUT
TRIG
+Vcc
C2
R1
R2
C1
Q1
Output
RE
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM555CN NOPB | 制造商:National Semiconductor 功能描述:Standard Timer Single 8-Pin PDIP Rail |
| LM555CN | 制造商:Texas Instruments 功能描述:IC TIMER 555 DIP8 |
| LM555CN/A+ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Timer Circuit |
| LM555CN/B+ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Timer Circuit |
| LM555CN/NOPB | 功能描述:计时器和支持产品 TIMER RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
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