| Название | Описание | Производитель | Корпус | Выводы | Темп. Диапазон | Файл PDF |
| AT89C51-20PC | 8-bit microcontroller with 4K bytes flash, 5V, 20MHz | ATMEL Corporation | PDIP | 40 | 0°C | 70°C | AT89C51-20PC datasheet (129K) |
| AT89C51-20PI | 8-bit microcontroller with 4K bytes flash, 5V, 20MHz | ATMEL Corporation | PDIP | 40 | -40°C | 85°C | AT89C51-20PI datasheet (129K) |
| AT89C51-20QC | 8-bit microcontroller with 4K bytes flash, 5V, 20MHz | ATMEL Corporation | PQFP | 44 | 0°C | 70°C | AT89C51-20QC datasheet (129K) |
| AT89C51-20QI | 8-bit microcontroller with 4K bytes flash, 5V, 20MHz | ATMEL Corporation | PQFP | 44 | -40°C | 85°C | AT89C51-20QI datasheet (129K) |
| AT89C51-24AC | 8-bit microcontroller with 4K bytes flash, 5V, 24MHz | ATMEL Corporation | TQFP | 44 | 0°C | 70°C | AT89C51-24AC datasheet (129K) |
| AT89C51-24AI | 8-bit microcontroller with 4K bytes flash, 5V, 24MHz | ATMEL Corporation | TQFP | 44 | -40°C | 85°C | AT89C51-24AI datasheet (129K) |
| AT89C51-24JC | 8-bit microcontroller with 4K bytes flash, 5V, 24MHz | ATMEL Corporation | PLCC | 44 | 0°C | 70°C | AT89C51-24JC datasheet (129K) |
| AT89C51-24JI | 8-bit microcontroller with 4K bytes flash, 5V, 24MHz | ATMEL Corporation | PLCC | 44 | -40°C | 85°C | AT89C51-24JI datasheet (129K) |
| AT89C51-24PC | 8-bit microcontroller with 4K bytes flash, 5V, 24MHz | ATMEL Corporation | PDIP | 40 | 0°C | 70°C | AT89C51-24PC datasheet (129K) |
| AT89C51-24PI | 8-bit microcontroller with 4K bytes flash, 5V, 24MHz | ATMEL Corporation | PDIP | 40 | -40°C | 85°C | AT89C51-24PI datasheet (129K) |
