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E-LS1240A PDF预览

E-LS1240A

更新时间: 2024-10-30 12:52:39
品牌 Logo 应用领域
意法半导体 - STMICROELECTRONICS 电信集成电路电信电路电话电路光电二极管
页数 文件大小 规格书
9页 245K
描述
Low current consumption, in order to allow the parallel operation of 4 devices

E-LS1240A 技术参数

是否Rohs认证: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:unknown
HTS代码:8542.39.00.01风险等级:5.8
Is Samacsys:NJESD-30 代码:R-PDIP-T8
功能数量:1端子数量:8
最高工作温度:70 °C最低工作温度:-40 °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):250
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:OTHER
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:40
宽度:7.62 mmBase Number Matches:1

E-LS1240A 数据手册

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LS1240  
Electronic two-tone ringer  
Features  
Low current consumption, in order to allow the  
parallel operation of 4 devices  
Integrated rectifier bridge with zener diodes to  
protect against over voltages little external  
circuitry  
Minidip  
Tone and switching frequencies adjustable by  
external components  
Integrated voltage and current hysteresis  
Description  
LS1240 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  
(buzzer) or a dynamic loudspeaker.  
SO8  
The two tone frequencies generated are switched  
by an internal oscillator in a fast sequence and  
are maaudible across an output amplifier in the  
loudspeaker. Both tone frequencies and the  
switching frequency can be externally adjusted.  
The output current capability of LS1240 is higher  
than the one of a standard ringer. To drive a  
dynamic loudspeaker LS1240 can simply use a  
decoupling capacitor, thus eliminating the usual  
transformer.  
The supply voltage is obtained from the AC ring  
signal and the circuit is designed so that noise on  
the line or variations of the ringing signal cannot  
affect correct operation of the device.  
No current limitation is provided on the output  
stage of LS1240, so a minimum load DC of 50 Ω  
is advised, in series with a proper capacitor.  
Pin connection (top view)  
August 2006  
Rev 2  
1/9  
www.st.com  
9

E-LS1240A 替代型号

型号 品牌 替代类型 描述 数据表
E-LS1240AD1 STMICROELECTRONICS

完全替代

Electronic two-tone ringer
LS1240A STMICROELECTRONICS

完全替代

ELECTRONIC TWO - TONE RINGER
LS1240AD1 STMICROELECTRONICS

完全替代

ELECTRONIC TWO - TONE RINGER

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