| AT89C4051-12PA | 8-bit microcontroller with 4K bytes flash, 3.0V to 6.0V in 20-pin plastic PDIP package. Operational temperature range from -40°C to 105°C. | Datasheet*) |
| AT89C4051-12PC | 8-bit microcontroller with 4K bytes flash, 3.0V to 6.0V in 20-pin plastic PDIP package. Operational temperature range from 0°C to 70°C. | Datasheet*) |
| AT89C4051-12PI | 8-bit microcontroller with 4K bytes flash, 3.0V to 6.0V in 20-pin plastic PDIP package. Operational temperature range from -40°C to 85°C. | Datasheet*) |
| AT89C4051-12SA | 8-bit microcontroller with 4K bytes flash, 3.0V to 6.0V in 20-pin plastic SOIC package. Operational temperature range from -40°C to 105°C. | Datasheet*) |
| AT89C4051-12SC | 8-bit microcontroller with 4K bytes flash, 3.0V to 6.0V in 20-pin plastic SOIC package. Operational temperature range from 0°C to 70°C. | Datasheet*) |
| AT89C4051-12SI | 8-bit microcontroller with 4K bytes flash, 3.0V to 6.0V in 20-pin plastic SOIC package. Operational temperature range from -40°C to 85°C. | Datasheet*) |
| AT89C4051-24PC | 8-bit microcontroller with 4K bytes flash, 4.0V to 6.0V in 20-pin plastic PDIP package. Operational temperature range from 0°C to 70°C. | Datasheet*) |
| AT89C4051-24PI | 8-bit microcontroller with 4K bytes flash, 4.0V to 6.0V in 20-pin plastic PDIP package. Operational temperature range from -40°C to 85°C. | Datasheet*) |
| AT89C4051-24SC | 8-bit microcontroller with 4K bytes flash, 4.0V to 6.0V in 20-pin plastic SOIC package. Operational temperature range from 0°C to 70°C. | Datasheet*) |
| AT89C4051-24SI | 8-bit microcontroller with 4K bytes flash, 4.0V to 6.0V in 20-pin plastic SOIC package. Operational temperature range from -40°C to 85°C. | Datasheet*) |
| AT89C4051-12PU | 3Volt, 80C31 Microcontroller with 4K bytes Flash, 20-Pin Package | Datasheet*) |
| AT89C4051-12SU | 3Volt, 80C31 Microcontroller with 4K bytes Flash, 20-Pin Package | Datasheet*) |
| AT89C4051-24PU | 3Volt, 80C31 Microcontroller with 4K bytes Flash, 20-Pin Package | Datasheet*) |
| AT89C4051-24SU | 3Volt, 80C31 Microcontroller with 4K bytes Flash, 20-Pin Package | Datasheet*) |
