自本刊今年第五期刊出笔者“带正点报时功能的LED数字钟”一文后,收到许多读者的来信。现根据读者来信中所涉及的问题,对原文做一补充。LM8361为日本三洋公司生产的PMOS大规模数字钟专用集成电路,其引脚排列如图1所示。电子钟的时基由脚35输入,时基信号可取自交流50Hz工频,也可由石英晶体经适当分频后获得。对于频率为50Hz的时基信号,脚36需接高电平(Vss),若输入时基为60Hz,则脚36悬空。 Since the publication of the fifth issue of this year, the author has received many letters from readers after reading the article entitled “LED Digital Clock with Punctuality Timekeeping Function”. Now according to the readers involved in the letter, make a supplement to the original. LM8361 for the Japanese company Sanyo PMOS large-scale digital clock dedicated integrated circuits, the pin arrangement shown in Figure 1. The time base of the electronic clock is input by the foot 35, the time base signal can be taken from the alternating current 50Hz labor frequency, also can obtain after the quartz crystal divides by the appropriate frequency. For the time-base signal with frequency of 50Hz, pin 36 should be connected to high level (Vss). If the input time base is 60Hz, then pin 36 is vacant.