LM555

更新时间： 2024-02-03 16:16:52

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LM555 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

When the trigger starts in a timer configured as shown in Figure 13, the current flowing through capacitor C1 becomes a

constant current generated by PNP transistor and resistors.

Hence, the V is a linear ramp function as shown in Figure 14. The gradient S of the linear ramp function is defined as

follows:

p – p

S = ----------------

(14)

Here the Vp-p is the peak-to-peak voltage.

If the electric charge amount accumulated in the capacitor is divided by the capacitance, the V comes out as follows:

V=Q/C

(15)

The above equation divided on both sides by T gives us

Q ⁄ T

--- = -----------

(16)

and may be simplified into the following equation.

S=I/C (17)

In other words, the gradient of the linear ramp function appearing across the capacitor can be obtained by using the constant

current flowing through the capacitor.

If the constant current flow through the capacitor is 0.215mA and the capacitance is 0.02µF, the gradient of the ramp function

at both ends of the capacitor is S = 0.215m/0.022µ = 9.77V/ms.

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型号	品牌	获取价格	描述	数据表
LM555_12	FAIRCHILD	获取价格	Single Timer
LM555C	HARRIS	获取价格	Timers for Timing Delays and Oscillator Application in Commercial, Industrial and Military
LM555C	INTERSIL	获取价格	Timers for Timing Delays and Oscillator Applications in Commercial, Industrial and Militar
LM555CE	ETC	获取价格	Analog Timer Circuit
LM555CH	NSC	获取价格	PULSE; RECTANGULAR, TIMER, MBCY8, METAL CAN-8
LM555CIM	ETC	获取价格	Analog Timer Circuit
LM555CIN	ETC	获取价格	Analog Timer Circuit
LM555CJ/A+	ETC	获取价格	Analog Timer Circuit
LM555CM	NSC	获取价格	Timer
LM555CM	FAIRCHILD	获取价格	Single Timer