芯天下
7400
部件型号 厂商 描述

SN74145NSRG4

 Texas Instruments Encoders, Decoders, Multiplexers & Demultiplexers BCD-To-Decimal

DM74157N

 Fairchild Semiconductor IC MULTIPLEXER/SELECT 2-1 16-DIP

DM74251N

 Fairchild Semiconductor IC DATA SELECTOR TRI-ST 16DIP
1
1-1