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| PartNumber | P80C557E4EFB/ 01/55 | P80C557E4EFB/01 | P80C557E4EFB/01-51 |
| Description | 8-bit Microcontrollers - MCU | - Bulk (Alt: P80C557E4EFB/01-51) | |
| Manufacturer | NXP | - | - |
| Product Category | 8-bit Microcontrollers - MCU | - | - |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | PQFP-80 | - | - |
| Series | P80C557E4 | - | - |
| Core | 80C51 | - | - |
| Data Bus Width | 8 bit | - | - |
| Height | 2.9 mm (Max) | - | - |
| Length | 20.1 mm (Max) | - | - |
| Width | 14.1 mm (Max) | - | - |
| Brand | NXP Semiconductors | - | - |
| Product Type | 8-bit Microcontrollers - MCU | - | - |
| Subcategory | Microcontrollers - MCU | - | - |
| Unit Weight | 0.032999 oz | - | - |