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> Ic SN74221N 74221N 74221 = DM74221N ttl dil (not smd)
Ic SN74221N 74221N 74221 = DM74221N ttl dil (not smd)
Top quality brands - Texas Instruments, National Semiconductor, Signetics etc.
DM..... = National Semiconductor (NSC)
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DIL = Dual-in-line package (DIP)
SMD = Surface-mount package (SMT)
TTL = Transistor-Transistor logic