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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1. |  PC16552CV | Dual Universal Asynchronous Receiver/Transmitter with FIFOs | National Semiconductor | NSC | - | - | - | 848 Kb |
| 2. | PC16550D | PC16550D Universal Asynchronous Receiver/Transmitter with FIFOs | National Semiconductor | NSC | - | - | - | 364 Kb |
| 3. | PC16550DN | PC16550D Universal Asynchronous Receiver/Transmitter with FIFOs | National Semiconductor | NSC | - | - | - | 364 Kb |
| 4. | PC16550DV | PC16550D Universal Asynchronous Receiver/Transmitter with FIFOs | National Semiconductor | NSC | - | - | - | 364 Kb |
| 5. | PC16550DVEF | PC16550D Universal Asynchronous Receiver/Transmitter with FIFOs | National Semiconductor | NSC | - | - | - | 364 Kb |
| 6. | PC16550DVX | Engineering Project Manager | National Semiconductor | NSC | - | - | - | 83 Kb |
| 7. | PC16552C | Dual Universal Asynchronous Receiver/Transmitter with FIFOs | National Semiconductor | NSC | - | - | - | 848 Kb |
| 8. | PC16552CV | Dual Universal Asynchronous Receiver/Transmitter with FIFOs | National Semiconductor | NSC | - | - | - | 848 Kb |
| 9. | PC16552CV/A+ | Dual universal asynchronous receiver/transmitter with FIFOs. | National Semiconductor | NSC | - | - | - | 848 Kb |
| 10. | PC16552D | Dual Universal Asynchronous Receiver/Transmitter with FIFOs | National Semiconductor | NSC | - | - | - | 310 Kb |
| 11. | PC16552DV | Dual Universal Asynchronous Receiver/Transmitter with FIFOs | National Semiconductor | NSC | - | - | - | 310 Kb |
| 12. | PC16553 | Dual Universal Asynchronous Receiver/Transmitter with FIFOs plus High Performance Parallel Interface | National Semiconductor | NSC | - | - | - | 1.37 Mb |
| 13. | PC16553V | Dual Universal Asynchronous Receiver/Transmitter with FIFOs plus High Performance Parallel Interface | National Semiconductor | NSC | - | - | - | 1.37 Mb |
