| # | Part Name | Description |
|---|
| 1 | AT89S51-24 | 8-bit Microcontroller with 4K Bytes In-System Programmable Flash |
| 2 | AT89S51-24AC | 8-bit Microcontroller with 4K Bytes In-System Programmable Flash |
| 3 | AT89S51-24AI | 8-bit Microcontroller with 4K Bytes In-System Programmable Flash |
| 4 | AT89S51-24JC | 8-bit Microcontroller with 4K Bytes In-System Programmable Flash |
| 5 | AT89S51-24JI | 8-bit Microcontroller with 4K Bytes In-System Programmable Flash |
| 6 | AT89S51-24PC | 8-bit Microcontroller with 4K Bytes In-System Programmable Flash |
| 7 | AT89S51-24PI | 8-bit Microcontroller with 4K Bytes In-System Programmable Flash |
| 8 | AT89S51-24SC | 8-bit Microcontroller with 4K Bytes In-System Programmable Flash |
| 9 | AT89S51-24SI | 8-bit Microcontroller with 4K Bytes In-System Programmable Flash |
| 10 | AT89S51-33AC | 8-bit Microcontroller with 4K Bytes In-System Programmable Flash |
| 11 | AT89S51-33JC | 8-bit Microcontroller with 4K Bytes In-System Programmable Flash |
| 12 | AT89S51-33PC | 8-bit Microcontroller with 4K Bytes In-System Programmable Flash |
| 13 | AT89S51-33SC | 8-bit Microcontroller with 4K Bytes In-System Programmable Flash |
