| PartNumber | DS89C450-ENG+ | DS89C450-ENG | DS89C450-ENL |
| Description | 8-bit Microcontrollers - MCU Ultra-High-Speed Flash MCU | 8-bit Microcontrollers - MCU Ultra-High-Speed Flash MCU | 8-bit Microcontrollers - MCU Ultra-High-Speed Flash MCU |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | - | - |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | TQFP-44 | TQFP-44 | TQFP-44 |
| Series | DS89C450 | DS89C450 | DS89C450 |
| Core | 8051 | 8051 | 8051 |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 33 MHz |
| Program Memory Size | 64 kB | 64 kB | 64 kB |
| Data RAM Size | 1 kB | 1 kB | 1 kB |
| ADC Resolution | No ADC | No ADC | No ADC |
| Number of I/Os | 4 I/O | 4 I/O | 4 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 | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Tube | Tube | Tube |
| Height | 1.05 mm | 1.05 mm | 1.05 mm |
| Length | 10 mm | 10 mm | 10 mm |
| Program Memory Type | Flash | Flash | Flash |
| Width | 10 mm | 10 mm | 10 mm |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Data RAM Type | SRAM | SRAM | SRAM |
| Interface Type | UART | UART | UART |
| Development Kit | DS89C450-KIT# | DS89C450-KIT# | DS89C450-KIT# |
| Moisture Sensitive | Yes | Yes | Yes |
| Number of Timers/Counters | 3 Timer | 3 Timer | 3 Timer |
| Processor Series | DS89C450 | DS89C450 | DS89C450 |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 160 | 160 | 160 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage Min | 4.5 V | 4.5 V | 4.5 V |
| Part # Aliases | 90-89450+ENG DS89C450 | DS89C450 | DS89C450 |