Datasheet > LS1240

LS1240

更新时间： 2024-02-05 02:58:05

品牌	Logo	应用领域
永盛 - Wing Shing		光电二极管电子
页数	文件大小	规格书
4页	294K
描述
Electronic Two-Tone Ringer

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技术参数
数据手册

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LS1240 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：	8	Reach Compliance Code：	compliant
HTS代码：	8542.39.00.01	风险等级：	5.56
Is Samacsys：	N	JESD-30 代码：	R-PDIP-T8
JESD-609代码：	e3	长度：	9.652 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：	-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）：	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：	OTHER
端子面层：	Matte Tin (Sn)	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

LS1240 数据手册

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)

Wing Shing Computer Components Co., (H.K.)Ltd.

Homepage: http://www.wingshing.com

Tel:(852)2341 9276 Fax:(852)2797 8153

E-mail: wsccltd@hkstar.com

12 3 4

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