| Part No | Manufacturer | Price | Stock |
| Aspect | IDT74FCT521TSO | – | – | from 7 days |
| ООО "Интегральные схемы" | IDT74FCT521TSO | – | – | from 7 days |
| Aspect | IDT74FCT521TSOB | – | – | from 7 days |
| ООО "Интегральные схемы" | IDT74FCT521TSOB | – | – | from 7 days |
| tehprom | IDT74FCT521TSO INTEGRATED (Импорт) | – | 2847 RUB | mult: 2190 RUB | 120 |
ALBERT.A | IDT74FCT521TSO INTEGRATED (D/c: : 01:120) | – | 1460 RUB | 120 |
| "Б-Союз" | IDT74FCT521TSO INTEGRATED | – | bulk: 1825 RUB | 120 |
| OOO "Radio-Komplekt" | IDT74FCT521TSO INTEGRATED (Подробнее) | – | bulk: 2226.79 RUB | mult: 1810.4 RUB | 90 |
| MK | IDT74FCT521TSO INTEGRATED (idt74fct521tso - 01г-120шт. >для заказа или запроса нажмите на> Подробнее) | – | 1743 RUB | bulk: 1674 RUB | mult: 1606 RUB | 120 |
