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为石英钟设计的集成电路5G5544和IC7071,可获得高精确度的秒信号。这两种集成电路都采用低压CMOS工艺,由1.5V干电池供电,功耗极微,电池能用一年以上。其输出端可驱动石英钟的步进电机。输出的秒信号幅度较低,约1.5V,若与CMOS数字电路匹配,应加一级电平转换器(即电压放大器)。 1.5G5544时钟集成电路上无元件五厂生产的5G5544,电源电压范围是1.2～2V,典型值为1.5V。工作电流I_(DD)=2.0μA(典型值),频率稳定度高达0.5ppm(即千万分之五),连续计时的年误差一般不超过30秒/年。实用电路如图1所示。只需外接一个32768Hz石英晶体和一只微调电容即可。
The integrated circuits 5G5544 and IC7071 designed for quartz clocks provide high-precision second signals. Both ICs use low-voltage CMOS technology, powered by a 1.5V battery, with minimal power consumption and a battery life of more than a year. Its output can drive quartz clock stepper motor. The output of the second signal amplitude is low, about 1.5V, if matching with the CMOS digital circuit, should add a level converter (ie, voltage amplifier). 1.5G5544 clock IC no components factory production 5G5544, the power supply voltage range is 1.2 ~ 2V, the typical value of 1.5V. Operating current I DD = 2.0μA typ., Frequency stability up to 0.5ppm (ie five millionths of a millionth). The annual error of continuous timing is generally not more than 30 seconds per year. Practical circuit shown in Figure 1. Just add a 32768Hz quartz crystal and a trim capacitor can be.