DM74S257
FAIRCHILD
19960
NA
onsemi(安森美)
7350
PDIP16
FAIRCHILD/仙童
150
NA/
FSC
332
DIP16
TI(德州仪器)
6000
NAT
25
NSC
8888
原装原封
FSC
28000
DIP16
NS
5645
DIP
NS
80000
DIP
NS/国半
6000
DIP
NS
562000
DIP
FSC/ON
2193
原包装原封 □□
NATIONALSEMI
6116
原厂原装
NS
5045
DIP16