SL74HC221D и другие
| Компонент | Описание | Производитель | |
| SL74HC221 | Dual Monostable Multivibrator |
System Logic Semiconductor |
 |
| SL74HC221D | Dual Monostable Multivibrator |
System Logic Semiconductor |
|
| SL74HC221N | Dual Monostable Multivibrator |
System Logic Semiconductor |
|