5秒后页面跳转
捷配首页

Datasheet > LM3905
LM3905 PDF预览

LM3905

更新时间： 2024-11-17 22:51:51
品牌 Logo 应用领域
美国国家半导体 - NSC /
页数 文件大小 规格书
14页 282K
描述
Precision Timers

阅读下载

中文翻译

获取价格

LM3905 数据手册

 浏览型号LM3905的Datasheet PDF文件第2页浏览型号LM3905的Datasheet PDF文件第3页浏览型号LM3905的Datasheet PDF文件第4页浏览型号LM3905的Datasheet PDF文件第5页浏览型号LM3905的Datasheet PDF文件第6页浏览型号LM3905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

下载PDF

与LM3905相关器件

型号 品牌 获取价格 描述 数据表
LM3905N NSC

获取价格

 		Precision Timers
LM3905N/B+ ETC

获取价格

 		Analog Timer Circuit
LM3909 NSC

获取价格

 		LM3909 LED Flasher/Oscillator
LM3909N NSC

获取价格

 		LM3909 LED Flasher/Oscillator
LM390N NSC

获取价格

 		LM390 1W Battery Operated Audio Power Amplifier
LM390N/B+ ETC

获取价格

 		Single Audio Amplifier
LM390Z SEOUL

获取价格

 		GREEN OVAL LAMP LED
LM391 SEOUL

获取价格

 		INFRARED LAMP LED
LM391 NSC

获取价格

 		LM391 Audio Power Driver
LM39100 HTC

获取价格

 		1A Low-Voltage Low-Dropout Regulator

与LM3905相关文章

您还可以找


热门产品
PCB打样/小批量
铝基板
BOM智能配单
PCBA制造
钣金
精密CNC
模具注塑
薄膜开关
精选活动
PCBA打样特惠
四六层板品质升级
铝基板品质升级
一体化电子制造
DFM下载
服务支持
企业认证
产品展示
工厂展示
工艺能力
积分商城
关于捷配
捷配简介
企业文化
公司动态
人才招聘
联系我们
帮助中心
下单流程
付款流程
开票流程
常见问题
全球PCB制造服务专线 400-613-0088

工作时间：9:00-21:00

CEO邮箱：ceo@jiepei.com

投诉邮箱：tousu@jiepei.com

捷配网-微信公众号 微信公众号
捷配网-微信公众号 抖音公众号
资质认证：
合作快递：
支付方式：
Copyright © 2024 Jiepei.com Inc. All Rights Reserved. 版权所有:杭州捷配信息科技有限公司 浙公网安备 33010502006866号 浙ICP备10014259号-119 营业执照ICP证