| No. |
Part Name |
Description |
Manufacturer |
| 1 |
D220D |
2 NAND gates with 4 inputs each, TTL fast series, possibly equivalent SN74H20N |
RFT |
| 2 |
N74H20 |
Dual 4-Input positive NAND gate |
Signetics |
| 3 |
N74H20A |
Dual 4-Input positive NAND gate |
Signetics |
| 4 |
N74H20F |
Dual 4-Input positive NAND gate |
Signetics |
| 5 |
N74H21 |
Dual 4-Input positive AND gate |
Signetics |
| 6 |
N74H21A |
Dual 4-Input positive AND gate |
Signetics |
| 7 |
N74H21F |
Dual 4-Input positive AND gate |
Signetics |
| 8 |
N74H22 |
Dual 4-Input positive NAND gate with open collector output |
Signetics |
| 9 |
N74H22A |
Dual 4-Input positive NAND gate with open collector output |
Signetics |
| 10 |
N74H22F |
Dual 4-Input positive NAND gate with open collector output |
Signetics |
| | | |
