LM555CM

更新时间： 2024-02-24 03:04:43

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LM555CM 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
Reach Compliance Code：	unknown	ECCN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-T8	JESD-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 SPECIFIED	Base Number Matches：	1

LM555/NE555/SA555

Figure 8. Waveforms of Frequency Divider Operation

4. Pulse Width Modulation

The timer output waveform may be changed by modulating the control voltage applied to the timer's pin 5 and changing the

reference of the timer's internal comparators. Figure 9 illustrates the pulse width modulation circuit.

When the continuous trigger pulse train is applied in the monostable mode, the timer output width is modulated according to

the signal applied to the control terminal. Sine wave as well as other waveforms may be applied as a signal to the control

terminal. Figure 10 shows the example of pulse width modulation waveform.

+Vcc

RESET

Vcc

Trigger

Output

DISCH

TRIG

THRES

CONT

OUT

Input

GND

Figure 9. Circuit for Pulse Width Modulation

Figure 10. Waveforms of Pulse Width Modulation

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 11,

the timer becomes a pulse position modulator.

In the pulse position modulator, the reference of the timer's internal comparators is modulated which in turn modulates the

timer output according to the modulation signal applied to the control terminal.

Figure 12 illustrates a sine wave for modulation signal and the resulting output pulse position modulation : however, any wave

shape could be used.

1...5 6 789 10 11...14

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