관련 데이터시트
74LS20Dual 4-Input NAND Gate - Fairchild Semiconductor
74LS20Dual 4-input Positive NAND Gates - Hitachi Semiconductor
74LS20Dual 4-Input NAND Gates - National Semiconductor
74LS20DUAL 4-INPUT NAND GATE - Motorola Semiconductors
74LS21Dual 4-input Positive AND Gates - Hitachi Semiconductor
74LS221LOW POWER SCHOTTKY - ON Semiconductor
74LS221Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs - Fairchild Semiconductor
74LS240LOW POWER SCHOTTKY - ON Semiconductor
74LS240Octal 3-STATE Buffer/Line Driver/Line Receiver - Fairchild Semiconductor