LS1240AD1

厂商：
WINGS
封装：
描述：
LS1240AD1 - Electronic Two-Tone Ringer - Wing Shing Computer Components

数据手册：

下载LS1240AD1.pdf

立即购买

详情介绍
数据手册
价格&库存

LS1240AD1 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 ADJUSTABLE BY EXTERNAL COMPONENTS INTEGRATED VOLTAGE AND CURRENT HYSTERESIS Minidip D ESCRIPTION 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 (buzzer)or a dynamic loudspeaker. The output current capability of LS1240A is higher than standard ringer. For driving a dynamic loudspeaker LS1240A can simply use a decoupling capacitor, thus eliminating the usual transformer. No current limitation is provided on the output stage of LS1240A, so a minimum load DC of 50 Ω is adviced, in series with a proper capacitor. The two tone frequencies generated are switched by an internal oscillator in a fast sequence and made audible across an output amplifier in the loudspeaker, both tone frequencies and the switching frequency can be externally adjusted. PIN CONNECTION ( top view) SO8 ORDERING NUMBERS Minidip LS1240A SO8 LS1240AD1 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. 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 WS BLOCK DIAGRAM LS1240A Figure 1 : Test Circuit. R1 = 2.72 ⋅ 104 f1 ⋅ ( 1 − 0.04 ln ) 1943 f1 (Hz) f2 = 0.725 f1 fSWEEP = 750 C1 (nF) WS ABSOLUTE MAXIMUM RATINGS Symbol VAB VAB DC Top Tstg Parameter Calling Voltage (f = 50 Hz) Continuous Calling Voltage (f = 50 Hz) 5s ON/10s OFF Supply Current Operating Temperature Storage and Junction Temperature Value 120 200 30 –20 to + 70 – 65 to + 150 LS1240A Unit Vrms Vrms mA °C °C THERMAL DATA Symbol Rth j-amb Parameter Thermal Resistance Junction-ambient Max Value Unit °C/W 2 00 ELECTRICAL CHARACTERISTICS (Tamb = 25 °C; Vs = applied between pins 7-2 unless otherwise specified) Symbol Vs IB VON VOFF RD VOUT IOUT Supply Voltage Current Consumption without Load (pins 8-1) Activation Voltage Sustaining Voltage Differential Resistance in OFF Condition (pins 8-1) Output Voltage Swing Short Circuit Current (pins 5-2) Vs = 20V RL = 250Ω V8-1 = 9.3 to 25 V 12 Parameter Test Conditions Min. Typ. 1.5 Max. 26 1.8 Unit V mA 13.5 9.3 Vs – 5 70 7.8 6.4 V V kΩ V mA kHz AC OPERATION f1 f2 Output Frequencies fout1 fout2 fOUT1 fOUT2 Programming Resistor Range fSWEEP Sweep Frequency R1 = 14kΩ, C1 = 100nF Vs = 26V, R1 = 14kΩ Vs = 0 V Vs = 6V 1.55 1.08 1.33 8 5.25 7.5 2.53 1.9 1.43 56 9.75 kΩ Hz WS Figure 2 : Typical Application with BUZZER LS1240A Figure 3 : Typical Application with Loudspeaker (no transformer needed) C1 such that ZLOAD  > 1 ΚΩ

下载 PDF

LS1240AD1

1. 物料型号： - LS1240A Minidip - LS1240AD1 SO8

2. 器件简介： - LS1240A是一种单片集成电路，旨在与电声转换器配合，替代电话机中的机械铃。它可以驱动压电陶瓷转换器（蜂鸣器）或动圈扬声器。

3. 引脚分配（顶视图）： - 1: LINE - 2: BUZZER - 3: RECTEIR N.C - 5: LINE - 7: LINE - 8: GROUND

4. 参数特性： - 供电电压：从AC振铃信号中获得。 - 功耗：30mA。 - 工作温度：-0至+70°C。 - 存储和结温：-65至+150°C。 - 绝对最大额定值：呼叫电压（50Hz）连续为120Vms，5s ON/10s OFF为200Vms。

5. 功能详解： - LS1240A的输出电流能力高于标准振铃。驱动动圈扬声器时，LS1240A可以直接使用去耦电容器，从而省去通常需要的变压器。 - 两个音调频率由内部振荡器快速切换，并可通过扬声器的输出放大器听到，音调频率和切换频率都可以外部调整。

6. 应用信息： - 图2展示了与蜂鸣器配合使用的典型应用。 - 图3展示了与扬声器配合使用的典型应用（无需变压器）。

7. 封装信息： - 提供了Minidip和SO8两种封装。

LS1240AD1 价格&库存

-> 查询更多价格&库存

很抱歉，暂时无法提供与“LS1240AD1”相匹配的价格&库存，您可以联系我们找货