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LS1240 PDF预览

LS1240

更新时间： 2024-11-23 22:31:03
品牌 Logo 应用领域
意法半导体 - STMICROELECTRONICS 电信电路电话电路光电二极管电子
页数 文件大小 规格书
7页 500K
描述
ELECTRONIC TWO - TONE RINGER

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中文翻译

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LS1240 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：DIP包装说明：DIP, DIP8,.3
针数：8Reach Compliance Code：not_compliant
HTS代码：8542.39.00.01风险等级：5.59
Is Samacsys：NJESD-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：70 °C
最低工作温度：-20 °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：26 V
认证状态：Not Qualified座面最大高度：5.08 mm
子类别：Telephone Circuits标称供电电压：26 V
表面贴装：NO电信集成电路类型：TELEPHONE RINGER CIRCUIT
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 mmBase Number Matches：1

LS1240 数据手册

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LS1240A  
®
ELECTRONIC TWO - TONE RINGER  
.
.
LOW CURRENT CONSUMPTION, IN ORDER  
TO ALLOW THE PARALLEL OPERATION OF 4  
DEVICES  
INTEGRATED RECTIFIER BRIDGE WITH  
ZENER DIODES TO PROTECT AGAINST  
OVERVOLTAGES  
.
.
LITTLE EXTERNAL CIRCUITRY  
TONE AND SWITCHING FREQUENCIES AD-  
JUSTABLE BY EXTERNAL COMPONENTS  
INTEGRATED VOLTAGE AND CURRENT  
HYSTERESIS  
Minidip  
.
DESCRIPTION  
LS1240A is a monolithic integrated circuit designed  
to replace the mechanical bell in telephone sets in  
connection with an electro-acoustical converter. It  
can drive directly a piezoceramic converter (buzz-  
er)or a dynamic loudspeaker.  
SO8  
The output current capability of LS1240A is higher  
than standard ringer. For driving a dynamic loud-  
speaker LS1240A can simply use a decoupling ca-  
pacitor, thus eliminating the usual transformer.  
ORDERING NUMBERS  
No current limitation is provided on the output stage  
of LS1240A, so a minimum load DC of 50 Ω is ad-  
viced, in series with a proper capacitor.  
Minidip  
SO8  
LS1240A  
LS1240AD1  
The two tone frequencies generated are switched  
by an internal oscillator in a fastsequence and made  
audible across an output amplifier in the loud-  
speaker, both tone frequencies and the switching  
frequency can be externally adjusted.  
The supply voltage is obtained from the AC ring sig-  
nal and the circuit is designed so that noise on the  
line or variations of the ringing signal cannot affect  
correct operation of the device.  
PIN CONNECTION (top view)  
1/7  
July 1998  
1234567

中文翻译

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