74HC20 Dual 4-input NAND gate
74HC20D Dual 4-input NAND gate
74HC20D-T Dual 4-input NAND Gate
74HC20DB Dual 4-input NAND gate
74HC20N Dual 4-input NAND gate
74HC21 Dual 4-input gate
74HC21D Dual 4-input AND Gate
74HC21D-T Dual 4-input AND Gate
74HC21DB Dual 4-input gate
74HC21N IC TTL CMOS HIGH SPEED N/DIP14
74HC21NB Dual 4-input AND gate
74HC21U Dual 4-input AND gate
74HC221 Dual non-retriggerable monostable multivibrator with reset
74HC221D Dual non-retriggerable monostable multivibrator with reset
74HC221D-T Monostable Multivibrator