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| Lead Time | 20 Weeks , 20 Weeks , 20 Weeks , 20 Weeks , 20 Weeks |
| SRAM | 256+1K , 256+1K , 256+1K , 256+1K , 256+1K |
| I/O | 36 , 36 , 36 , 36 , 36 |
| Timer | 3*16-bit , 3*16-bit , 3*16-bit , 3*16-bit , 3*16-bit |
| UART | 2 , 2 , 2 , 2 , 2 |
| Package | PDIP40/PLCC44/PQFP44 , PDIP40/PLCC44/PQFP44 , PDIP40/PLCC44/PQFP44 , PDIP40/PLCC44/PQFP44 , PDIP40/PLCC44/PQFP44 |
| Status | Mass Production , Mass Production , Mass Production , Mass Production , Mass Production |
| INT | 6 , 6 , 6 , 6 , 6 |
| Special Function | dual DPTZ , Extra I/O port , dual DPTZ , Extra I/O port , dual DPTZ , Extra I/O port , dual DPTZ , Extra I/O port , dual DPTZ , Extra I/O port |
The Nuvoton standard 8051 series is pin-compatible with traditional 12T 8051 and operating at 2.4V ~ 5.5V and - 40 ℃ ~ 85 ℃.
