M74HC237M1 M74HC237B1 M74HC221F1 M74HC221B1 M74HC21M1R

M74HC237B1R M74HC221M1R M74HC221M1P M74HC221B1R M74HC21M1R1

全新正品 M74HC2221B1R M74HC221BIR 74HC221 DIP16 直插16脚

贴插AC108RA8KPB 2SA2029T2LR M74HC244B1R M74HC221M1R N

原装 M74HC221B1R DIP16 集成电路芯片

全新原装 M74HC221B1R DIP16 集成电路芯片

M74HC221B1R M74HC221RM13TR M74HC238B1R M74HC240B1R