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| PartNumber | DS87C520-MCL+ | DS87C520-ECL+ | DS87C520 |
| Description | 8-bit Microcontrollers - MCU EPROM/ROM High-Speed | 8-bit Microcontrollers - MCU EPROM/ROM High-Speed | |
| Manufacturer | Maxim Integrated | Maxim Integrated | MAXIM |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | Embedded - Microcontrollers |
| RoHS | Y | Y | - |
| Mounting Style | Through Hole | SMD/SMT | - |
| Package / Case | PDIP-40 | TQFP-44 | - |
| Series | DS87C520 | DS87C520 | - |
| Core | 8051 | 8051 | - |
| Data Bus Width | 8 bit | 8 bit | - |
| Maximum Clock Frequency | 33 MHz | 33 MHz | - |
| Program Memory Size | 16 kB | 16 kB | - |
| Data RAM Size | 1 kB | 1 kB | - |
| ADC Resolution | No ADC | No ADC | - |
| Number of I/Os | 32 I/O | 32 I/O | - |
| Operating Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | - |
| Minimum Operating Temperature | 0 C | 0 C | - |
| Maximum Operating Temperature | + 70 C | + 70 C | - |
| Packaging | Tube | Tube | - |
| Height | 4.06 mm | 1.05 mm | - |
| Length | 52.96 mm | 10 mm | - |
| Program Memory Type | EPROM | EPROM | - |
| Width | 14.1 mm | 10 mm | - |
| Brand | Maxim Integrated | Maxim Integrated | - |
| Data RAM Type | SRAM | SRAM | - |
| Interface Type | UART | UART | - |
| Number of Timers/Counters | 3 Timer | 3 Timer | - |
| Processor Series | DS87C520 | DS87C520 | - |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 10 | 20 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Supply Voltage Min | 4.5 V | 4.5 V | - |
| Part # Aliases | 90-87520+MCL DS87C520 | 90-87520+ECL DS87C520 | - |
| Unit Weight | 0.210004 oz | - | - |
| Moisture Sensitive | - | Yes | - |