| 257921 | AT89C4051-12SA | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257922 | AT89C4051-12SC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257923 | AT89C4051-12SI | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257924 | AT89C4051-24PC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257925 | AT89C4051-24PI | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257926 | AT89C4051-24SC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257927 | AT89C4051-24SI | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257928 | AT89C51 | 80C31 Microcontroller with 4K bytes Flash. Not recommended for new designs. Use AT89S51. | Atmel |
| 257929 | AT89C51-12 | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257930 | AT89C51-12AA | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257931 | AT89C51-12AC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257932 | AT89C51-12AI | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257933 | AT89C51-12JA | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257934 | AT89C51-12JC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257935 | AT89C51-12JI | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257936 | AT89C51-12PA | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257937 | AT89C51-12PC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257938 | AT89C51-12PI | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257939 | AT89C51-12QA | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
|
| 257940 | AT89C51-12QC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257941 | AT89C51-12QI | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257942 | AT89C51-16AA | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257943 | AT89C51-16AC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257944 | AT89C51-16AI | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257945 | AT89C51-16JA | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257946 | AT89C51-16JC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257947 | AT89C51-16JI | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257948 | AT89C51-16PA | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257949 | AT89C51-16PC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257950 | AT89C51-16PI | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257951 | AT89C51-16QA | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257952 | AT89C51-16QC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257953 | AT89C51-16QI | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257954 | AT89C51-20AC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257955 | AT89C51-20AI | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257956 | AT89C51-20JC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257957 | AT89C51-20JI | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257958 | AT89C51-20PC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257959 | AT89C51-20PI | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
| 257960 | AT89C51-20QC | 8-Bit Microcontroller with 4K Bytes Flash | Atmel |
