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LM555CMX PDF预览

LM555CMX

更新时间: 2024-01-06 21:42:34
品牌 Logo 应用领域
安森美 - ONSEMI PC光电二极管
页数 文件大小 规格书
15页 403K
描述
单计时器

LM555CMX 技术参数

生命周期:Not Recommended零件包装代码:SOIC
包装说明:SOP, SOP8,.25针数:8
Reach Compliance Code:not_compliantECCN代码:EAR99
HTS代码:8542.39.00.01Factory Lead Time:6 weeks
风险等级:5.1Is Samacsys:N
模拟集成电路 - 其他类型:PULSE; RECTANGULARJESD-30 代码:R-PDSO-G8
JESD-609代码:e0长度:4.9 mm
湿度敏感等级:1功能数量:1
端子数量:8最高工作温度:70 °C
最低工作温度:封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装等效代码:SOP8,.25
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):235电源:5/15 V
认证状态:Not Qualified座面最大高度:1.75 mm
子类别:Analog Waveform Generation Functions最大供电电流 (Isup):15 mA
最大供电电压 (Vsup):16 V最小供电电压 (Vsup):4.5 V
标称供电电压 (Vsup):5 V表面贴装:YES
技术:BIPOLAR温度等级:COMMERCIAL
端子面层:Tin/Lead (Sn/Pb)端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:3.9 mm
Base Number Matches:1

LM555CMX 数据手册

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Application Information  
Table 1 below is the basic operating table of 555 timer.  
Table 1. Basic Operating Table  
Discharging  
Transistor  
(PIN 7)  
Reset  
(PIN 4)  
VTR  
(PIN 2)  
VTH  
(PIN 6)  
Output  
(PIN 3)  
Low  
High  
High  
High  
X
X
Low  
High  
Low  
ON  
OFF  
ON  
< 1/3 VCC  
> 1/3 VCC  
> 1/3 VCC  
X
> 2/3 VCC  
< 2/3 VCC  
Previous State  
When the low signal input is applied to the reset terminal, the timer output remains low regardless of the threshold volt-  
age or the trigger voltage. Only when the high signal is applied to the reset terminal, the timer's output changes accord-  
ing to threshold voltage and trigger voltage.  
When the threshold voltage exceeds 2/3 of the supply voltage while the timer output is high, the timer's internal dis-  
charge transistor turns on, lowering the threshold voltage to below 1/3 of the supply voltage. During this time, the timer  
output is maintained low. Later, if a low signal is applied to the trigger voltage so that it becomes 1/3 of the supply volt-  
age, the timer's internal discharge transistor turns off, increasing the threshold voltage and driving the timer output  
again at high.  
1. Monostable Operation  
102  
+Vcc  
RA  
4
101  
100  
8
RESET  
Vcc  
Trigger  
7
6
DISCH  
TRIG  
OUT  
2
3
10-1  
10-2  
10-3  
THRES  
CONT  
C1  
5
GND  
RL  
C2  
1
10-5  
10-4  
10-3  
10-2  
10-1  
100  
101  
102  
Time Delay(s)  
Figure2. Monostable Circuit  
Figure 3. Resistance and Capacitance vs.  
Time Delay (tD)  
Figure 4. Waveforms of Monostable Operation  
© 2002 Fairchild Semiconductor Corporation  
LM555 Rev. 1.1.0  
www.fairchildsemi.com  
4

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