74HCT4017N,652概述
74hct4017 - 约翰逊十进制计数器，带10个解码输出
Counter IC Counter, Decade 1 Element 10 Bit Positive, Negative 16-DIP
得捷:
IC JOHNSON DECADE COUNTER 16-DIP
艾睿:
Counter/Divider Single 5-Bit Decade UP 16-Pin PDIP Bulk
Win Source:
IC JOHNSON DECADE COUNTER 16-DIP