SN74LS33N3 и другие
| Компонент | Описание | Производитель | |
| SN74LS33N | QUAD 2-INPUT NOR BUFFER |
Motorola, Inc |
 |
| SN74LS33N | QUADRUPLE 2-INPUT POSITIVE-NOR BUFFERS WITH OPEN-COLLECTOR OUTPUTS |
Texas Instruments |
|
| SN74LS33N3 | QUAD 2-INPUT POSITIVE-NOR BUFFERS WITH OPEN COLLECTOR OUTPUTS |
Texas Instruments |
|