MM5056H Integrated Circuit - TO99 - National Semiconductor - NSC

NS16550 Integrated Circuit - PLCC - National Semiconductor - NSC

LM1972N Integrated Circuit - DIP20 - National Semiconductor - NSC

MM5437 Integrated Circuit - DIP - National Semiconductor - NSC

NS16C552V Integrated Circuit - PLCC44 - National Semiconductor - NSC

MM5260D Integrated Circuit - DIP16 - National Semiconductor - NSC

NS16550AFV Integrated Circuit - PLCC44 - National Semiconductor - NSC

NMC9345N Integrated Circuit - DIP8 - National Semiconductor - NSC