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HD74184-bin?r HD74185(?r-BCD HD74190 HD74191(?r原
HD74190P HD74189P HD74188P HD74187P HD74186P HD74191P销
HLF减计数器芯片SN74190N
HD64F7018TE20 - SLG74190VTR - ST72F345C4T6TR - 原装器件请咨