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| PartNumber | SST89E54RD2A-40-C-NJE | SST89E54RD2A-40-C-TQJE | SST89E54RD2A-40-C-TQJE-T |
| Description | 8-bit Microcontrollers - MCU 24K (16Kx8K) 40MHz | 8-bit Microcontrollers - MCU 8-Bit 16K+8K Flash 40MHz 3/16-Bit Timer | 8-bit Microcontrollers - MCU 4.5-5.5V FL Flex 8B 8051 Microcontroller |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | PLCC-44 | TQFP-44 | TQFP-44 |
| Series | SST89E54 | SST89E54 | SST89E54 |
| Core | 8051 | 8051 | 8051 |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 40 MHz | 40 MHz | 40 MHz |
| Program Memory Size | 32 kB | 32 kB | 16 kB |
| Data RAM Size | 1 kB | 1 kB | 1 kB |
| ADC Resolution | No ADC | No ADC | No ADC |
| Number of I/Os | 32 I/O | 32 I/O | 5 I/O |
| Operating Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Minimum Operating Temperature | 0 C | 0 C | 0 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 70 C |
| Packaging | Tube | Tray | Reel |
| Height | 4 (Max) mm | 1.05 (Max) mm | - |
| Length | 16.66 (Max) mm | 10 mm | - |
| Program Memory Type | Flash | Flash | EEPROM |
| Width | 16.66 (Max) mm | 10 mm | - |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Interface Type | SPI | SPI | SPI |
| Moisture Sensitive | Yes | Yes | - |
| Number of Timers/Counters | 3 Timer | 3 Timer | 3 Timer |
| Processor Series | FlashFlex | FlashFlex | FlashFlex |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 27 | 160 | 1200 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Supply Voltage Min | 4.5 V | 4.5 V | - |
| Unit Weight | 0.084185 oz | - | - |
| Data RAM Type | - | - | RAM |