说明：  机电工程学院数字电路实验IC参考手册 本手册包含下列IC芯片（共15 种）： 74HC00、74HC01、74HC125、74HC138、74HC20、74HC153、74HC32 74HC283、74HC04、74HC86、74HC74、74HC76、74HC90、74HC194 555定时器。
(Electrical Engineering Reference Manual IC digital circuit experiment of this manual contains the following IC chips (a total of 15 species): 74HC00, 74HC01, 74HC125, 74HC138, 74HC20, 74HC153, 74HC32 74HC283, 74HC04, 74HC86, 74HC74, 74HC76, 74HC90, 74HC194 555 timer .)