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| PartNumber | AT89S8253-24JU | AT89S8253-24JC | AT89S8253-24JI |
| Description | 8-bit Microcontrollers - MCU 12kB Flash 256B RAM 2.7V-5.5V | 8-bit Microcontrollers - MCU Microcontroller | IC MCU 8BIT 12KB FLASH 44PLCC |
| Manufacturer | Microchip | Microchip | - |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| RoHS | Y | N | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | PLCC-44 | PLCC-44 | - |
| Series | 89S | 89S | - |
| Core | 8051 | 8051 | - |
| Data Bus Width | 8 bit | 8 bit | - |
| Maximum Clock Frequency | 24 MHz | 24 MHz | - |
| Program Memory Size | 12 kB | 12 kB | - |
| Data RAM Size | 256 B | 256 B | - |
| ADC Resolution | No ADC | No ADC | - |
| Number of I/Os | 32 I/O | 32 I/O | - |
| Operating Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | - |
| Minimum Operating Temperature | - 40 C | 0 C | - |
| Maximum Operating Temperature | + 85 C | + 70 C | - |
| Packaging | Tube | - | - |
| Height | 3.68 mm | 3.48 mm | - |
| Length | 16.66 mm | 16.7 mm | - |
| Product | MCU | - | - |
| Program Memory Type | Flash | Flash | - |
| Width | 16.66 mm | 16.7 mm | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | - |
| Interface Type | SPI, UART | SPI, UART | - |
| Moisture Sensitive | Yes | - | - |
| Number of Timers/Counters | 3 Timer | 3 Timer | - |
| Processor Series | AT89x | - | - |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 27 | - | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Supply Voltage Min | 2.7 V | 2.7 V | - |
| Unit Weight | 0.084185 oz | 0.084185 oz | - |