| Компонент | Описание | Производитель | |
| 54ACQ821FMQB | Quiet series 10-bit D flip-flop with TRI-STATE outputs. Device with environmental and burn-in processing shipped in tubes. |
National Semiconductor |
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| 54ACQ821FMX | Quiet series 10-bit D flip-flop with TRI-STATE outputs. Device shipped in 13 inches reels. |
National Semiconductor |