| Компонент | Описание | Производитель | |
| DM74LS221M | Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs |
Fairchild Semiconductor |
|
| DM74LS221M | Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs |
National Semiconductor |
|
| DM74LS221MX | Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs |
Fairchild Semiconductor |