관련 데이터시트
DM74LS20Dual 4-Input NAND Gates - National Semiconductor
DM74LS20Dual 4-Input NAND Gate - Fairchild Semiconductor
DM74LS20Dual 4-Input NAND Gates (Rev. A) - Texas Instruments
DM74LS21Dual 4-Input AND Gates - National Semiconductor
DM74LS221Dual Non-Retriggerable One-Shot - National Semiconductor
DM74LS221Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs - Fairchild Semiconductor
DM74LS240(DM74LS240 / DM74LS241) Octal TRI-STATE Buffers/Line Drivers/Line Receivers - National Semiconductor
DM74LS240(DM74LS240 / DM74LS241) Octal 3-STATE Buffer/Line Driver/Line Receiver - Fairchild Semiconductor
DM74LS241(DM74LS240 / DM74LS241) Octal TRI-STATE Buffers/Line Drivers/Line Receivers - National Semiconductor