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SN74HC164DRG4
SN74HC164DR
您好，这个几个不同尾缀，同样封装的型号，主要什么差异？只要引脚涂层不一样吗？是否都符合ROHS标准？使用时上有什么差异吗？
您好，
后缀G3/G4不再有意义，也就是说上述三种型号（SN74HC164DRG3、SN74HC164DRG4、SN74HC164DR）没有差异，可以一样使用，具体查看下面FAQ:
https://e2e.ti.com/support/logic-group/logic/f/logic-forum/720395/faq-why-does-a-logic-device-s-part-number-have-an-e4-g4-suffix?tisearch=e2e-sitesearch&keymatch=G4#
