| nhà sản xuất | tên linh kiện | bảng dữ liệu | Giải thích chi tiết về linh kiện |
 National Semiconductor ... | PC16552C |  827Kb/22P | Dual Universal Asynchronous Receiver/Transmitter with FIFOs |
| PC16552CV |  827Kb/22P | Dual Universal Asynchronous Receiver/Transmitter with FIFOs |
 National Semiconductor ... | PC16552CV |  827Kb/22P | Dual Universal Asynchronous Receiver/Transmitter with FIFOs |
 National Semiconductor ... | PC16552D |  291Kb/21P | Dual Universal Asynchronous Receiver/Transmitter with FIFOs |
| PC16552DV |  291Kb/21P | Dual Universal Asynchronous Receiver/Transmitter with FIFOs |
 National Semiconductor ... | PC16550D |  344Kb/22P | PC16550D Universal Asynchronous Receiver/Transmitter with FIFOs |
 National Semiconductor ... | PC16550DN |  344Kb/22P | PC16550D Universal Asynchronous Receiver/Transmitter with FIFOs |
 National Semiconductor ... | PC16550DV |  344Kb/22P | PC16550D Universal Asynchronous Receiver/Transmitter with FIFOs |
 National Semiconductor ... | PC16550DVEF |  344Kb/22P | PC16550D Universal Asynchronous Receiver/Transmitter with FIFOs |