| PartNumber | AT89LV51-12JI | AT89LV52-12AI | AT89LV51-12PC |
| Description | 8-bit Microcontrollers - MCU Microcontroller | 8-bit Microcontrollers - MCU Microcontroller | 8-bit Microcontrollers - MCU Microcontroller |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | N | N | N |
| Mounting Style | SMD/SMT | SMD/SMT | Through Hole |
| Package / Case | PLCC-44 | TQFP-44 | PDIP-40 |
| Series | 89LV | 89LV | 89LV |
| Core | 8051 | 8051 | 8051 |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 12 MHz | 12 MHz | 12 MHz |
| Program Memory Size | 4 kB | 8 kB | 4 kB |
| Data RAM Size | 128 B | 256 B | 128 B |
| ADC Resolution | No ADC | No ADC | No ADC |
| Number of I/Os | 32 I/O | 32 I/O | 32 I/O |
| Minimum Operating Temperature | - 40 C | - 40 C | 0 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 70 C |
| Height | 3.48 mm | 1 mm | 4.45 mm |
| Length | 16.7 mm | 10 mm | 52.58 mm |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | Flash | Flash |
| Width | 16.7 mm | 10 mm | 13.97 mm |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Number of Timers/Counters | 2 Timer | 3 Timer | 2 Timer |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 27 | 160 | 9 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 6 V | 6 V | 6 V |
| Supply Voltage Min | 2.7 V | 2.7 V | 2.7 V |
| Unit Weight | 0.084185 oz | - | 0.210004 oz |