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LM555 PDF预览

LM555

更新时间: 2024-02-06 07:13:20
品牌 Logo 应用领域
飞兆/仙童 - FAIRCHILD /
页数 文件大小 规格书
14页 152K
描述
Single Timer

LM555 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.13
Is Samacsys:N模拟集成电路 - 其他类型:PULSE; RECTANGULAR
JESD-30 代码:R-PDIP-T8JESD-609代码:e0
功能数量:1端子数量:8
最高工作温度:125 °C最低工作温度:-55 °C
封装主体材料:PLASTIC/EPOXY封装代码:DIP
封装等效代码:DIP8,.3封装形状:RECTANGULAR
封装形式:IN-LINE峰值回流温度(摄氏度):NOT SPECIFIED
电源:5/15 V认证状态:Not Qualified
子类别:Analog Waveform Generation Functions最大供电电流 (Isup):12 mA
最大供电电压 (Vsup):18 V最小供电电压 (Vsup):4.5 V
标称供电电压 (Vsup):15 V表面贴装:NO
技术:BIPOLAR温度等级:MILITARY
端子面层:Tin/Lead (Sn/Pb)端子形式:THROUGH-HOLE
端子节距:2.54 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIEDBase Number Matches:1

LM555 数据手册

 浏览型号LM555的Datasheet PDF文件第6页浏览型号LM555的Datasheet PDF文件第7页浏览型号LM555的Datasheet PDF文件第8页浏览型号LM555的Datasheet PDF文件第10页浏览型号LM555的Datasheet PDF文件第11页浏览型号LM555的Datasheet PDF文件第12页 
LM555/NE555/SA555  
+Vcc  
R
R
A
B
4
8
Vcc  
RESET  
7
6
5
DISCH  
TRIG  
2
3
THRES  
CONT  
Output  
OUT  
Modulation  
C
GND  
1
Figure 12. Waveforms of pulse position modulation  
Figure 11. Circuit for Pulse Position Modulation  
6. Linear Ramp  
When the pull-up resistor RA in the monostable circuit shown in Figure 1 is replaced with constant current source, the V  
C1  
increases linearly, generating a linear ramp. Figure 13 shows the linear ramp generating circuit and Figure 14 illustrates the  
generated linear ramp waveforms.  
+Vcc  
R1  
R
E
4
8
RESET  
Vcc  
7
6
DISCH  
Q1  
TRIG  
OUT  
2
3
R2  
THRES  
CONT  
Output  
C1  
5
GND  
C2  
1
Figure 14. Waveforms of Linear Ramp  
In Figure 13, current source is created by PNP transistor Q1 and resistor R1, R2, and R .  
Figure 13. Circuit for Linear Ramp  
E
V
V  
CC  
R
E
I
= --------------------------  
(12)  
C
E
Here, V  
E is  
R
2
---------------------  
V
= V  
+
V
(13)  
E
BE  
CC  
R
+ R  
1
2
For example, if Vcc=15V, R =20k, R1=5kW, R2=10k, and V =0.7V,  
BE  
E
V =0.7V+10V=10.7V  
E
Ic=(15-10.7)/20k=0.215mA  
9

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