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LM3905N

更新时间： 2024-11-20 22:51:51
品牌 Logo 应用领域
美国国家半导体 - NSC 光电二极管
页数 文件大小 规格书
14页 282K
描述
Precision Timers

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中文翻译

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LM3905N 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
包装说明：DIP, DIP8,.3Reach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.84模拟集成电路 - 其他类型：RECTANGULAR
JESD-30 代码：R-PDIP-T8JESD-609代码：e0
长度：9.817 mm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：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认证状态：Not Qualified
座面最大高度：5.08 mm子类别：Analog Waveform Generation Functions
最大供电电流 (Isup)：4.5 mA最大供电电压 (Vsup)：40 V
最小供电电压 (Vsup)：4.5 V表面贴装：NO
技术：BIPOLAR温度等级：COMMERCIAL
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宽度：7.62 mm
Base Number Matches：1

LM3905N 数据手册

 浏览型号LM3905N的Datasheet PDF文件第2页浏览型号LM3905N的Datasheet PDF文件第3页浏览型号LM3905N的Datasheet PDF文件第4页浏览型号LM3905N的Datasheet PDF文件第5页浏览型号LM3905N的Datasheet PDF文件第6页浏览型号LM3905N的Datasheet PDF文件第7页 
February 1995  
LM122/LM322/LM3905 Precision Timers  
General Description  
The LM122 series are precision timers that offer great ver-  
satility with high accuracy. They operate with unregulated  
supplies from 4.5V to 40V while maintaining constant timing  
periods from microseconds to hours. Internal logic and reg-  
ulator circuits complement the basic timing function  
enabling the LM122 series to operate in many different ap-  
plications with a minimum of external components.  
The comparator used in the LM122 utilizes high gain PNP  
input transistors to achieve 300 pA typical input bias current  
over a common mode range of 0V to 3V. A boost terminal  
allows the user to increase comparator operating current for  
timing periods less than 1 ms. This lets the timer operate  
over a 3 ms to multi-hour timing range with excellent repeat-  
ability.  
b
The LM122 operates over a temperature range of 55 C to  
The output of the timer is a floating transistor with built in  
current limiting. It can drive either ground referred or supply  
referred loads up to 40V and 50 mA. The floating nature of  
this output makes it ideal for interfacing, lamp or relay driv-  
ing, and signal conditioning where an open collector or emit-  
ter is required. A ‘‘logic reverse’’ circuit can be programmed  
by the user to make the output transistor either ‘‘on’’ or  
‘‘off’’ during the timing period.  
§
125 C. An electrically identical LM322 is specified from  
a
§
0 C to 70 C. The LM3905 is identical to the LM122 series  
a
§
§
except that the boost and V  
ADJ  
able, limiting minimum timing period to 1 ms.  
pin options are not avail-  
Features  
Y
Immune to changes in trigger voltage during timing  
interval  
The trigger input to the LM122 series has a threshold of  
1.6V independent of supply voltage, but it is fully protected  
Y
Timing periods from microseconds to hours  
g
against inputs as high as 40VÐeven when using a 5V  
Y
Internal logic reversal  
supply. The circuitry reacts only to the rising edge of the  
trigger signal, and is immune to any trigger voltage during  
the timing periods.  
Y
Immune to power supply ripple during the timing  
interval  
Y
Operates from 4.5V to 40V supplies  
An internal 3.15V regulator is included in the timer to reject  
supply voltage changes and to provide the user with a con-  
venient reference for applications other than a basic timer.  
External loads up to 5 mA can be driven by the regulator. An  
internal 2V divider between the reference and ground sets  
the timing period to 1 RC. The timing period can be voltage  
controlled by driving this divider with an external source  
Y
g
Input protected to 40V  
Y
Y
Y
Y
Floating transistor output with internal current limiting  
Internal regulated reference  
Timing period can be voltage controlled  
TTL compatible input and output  
through the V  
achieved.  
pin. Timing ratios of 50:1 can be easily  
ADJ  
Connection Diagrams  
Metal Can Package  
Dual-In-Line Package  
Dual-In-Line Package  
TL/H/7768–6  
Top View  
TL/H/7768–8  
Top View  
Order Number LM3905N  
See NS Package Number N08E  
Order Number LM122H  
See NS Package Number H10C  
TL/H/7768–7  
Top View  
Order Number LM322N  
See NS Package Number N14A  
C
1995 National Semiconductor Corporation  
TL/H/7768  
RRD-B30M115/Printed in U. S. A.  
1234567...14

中文翻译

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LM3905N 替代型号

型号 品牌 替代类型 描述 数据表
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