| CD54HC21 | Texas Instruments | High Speed CMOS Logic Dual 4-Input AND Gates |
| 5962-8857601CA | Texas Instruments | High Speed CMOS Logic Dual 4-Input AND Gates |
| CD54HC21F3A | Texas Instruments | High Speed CMOS Logic Dual 4-Input AND Gates |
| CD74HC21 | Texas Instruments | High Speed CMOS Logic Dual 4-Input AND Gates |
| CD74HC21E | Texas Instruments | High Speed CMOS Logic Dual 4-Input AND Gates |
| CD74HC21M | Texas Instruments | High Speed CMOS Logic Dual 4-Input AND Gates |
| CD74HC21M96 | Texas Instruments | High Speed CMOS Logic Dual 4-Input AND Gates |
| CD74HC21MT | Texas Instruments | High Speed CMOS Logic Dual 4-Input AND Gates |
| CD74HCT21 | Texas Instruments | High Speed CMOS Logic Dual 4-Input AND Gate |
| CD74HCT21E | Texas Instruments | High Speed CMOS Logic Dual 4-Input AND Gate |
| CD74HCT21M | Texas Instruments | High Speed CMOS Logic Dual 4-Input AND Gate |
| CD74HCT21M96 | Texas Instruments | High Speed CMOS Logic Dual 4-Input AND Gate |
| CD74HCT21MT | Texas Instruments | High Speed CMOS Logic Dual 4-Input AND Gate |