常用集成电路引脚

常用集成电路引脚图74LS00             74LS02         74LS0474LS10            74LS11          74LS2074LS22              74LS25           74LS5174LS54             74LS55         74LS7374LS74            74LS75             74LS8574LS86            74LS90           74LS11274LS121             74LS126           74LS132或门电路有四2输入或门74LS32和CD4071   74LS139          74LS153      74LS160  74LS16174LS175            74LS183          74LS194与门电路有四2输入与门74LS08和CD4081cd4511管脚功能介绍如下：LE：锁定控制端，当LE=0时，允许译码输出 LE=1时译码器是锁定保持状态，cd4511输出被保持在LE=0时的数值。

A1、A2、A3、A4、为8421BCD码输入端 a、b、c、d、e、f、g：为译码输出端，输出为高电平1有效BI：4脚是消隐输入控制端，当BI=0 时，不管其它输入端状态如何，七段数码管均处于熄灭（消隐）状态，不显示数字LT：3脚是测试输入端，当BI=1，LT=0 时，译码输出全为1，不管输入 DCBA 状态如何，七段均发亮，显示“8”它主要用来检测数码管是否正常        74LS280            74LS28374LS373                74H72           CD4001B4二输入或非门                        CD4009B          CD4011B                      CD4013B  CD4040B                CD4043              CD4051B                           CD4060B          CD4068B                      CD4069B        CD4070B                    CD4520B               CD4528B                      CD40106BNE555                            NE556                        CA3140                        LM358LM324。