| PartNumber | DS87C520-QCL+ | DS87C520-QCL+T\u0026R | DS87C520-QCL |
| Description | 8-bit Microcontrollers - MCU EPROM/ROM High-Speed | 8-bit Microcontrollers - MCU EPROM/ROM High-Speed | 8-bit Microcontrollers - MCU EPROM/ROM High-Speed |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | Y | N |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | PLCC-44 | PLCC-44 | PLCC-44 |
| Series | DS87C520 | DS87C520 | DS87C520 |
| Core | 8051 | 8051 | 8051 |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 33 MHz | 33 MHz | 33 MHz |
| Program Memory Size | 16 kB | 16 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 | 32 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 | Reel | Tube |
| Height | 3.68 mm | 3.68 mm | 3.96 mm |
| Length | 16.66 mm | 16.66 mm | 16.66 mm |
| Program Memory Type | EPROM | EPROM | EPROM |
| Width | 16.66 mm | 16.66 mm | 16.66 mm |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Data RAM Type | SRAM | SRAM | SRAM |
| Interface Type | UART | UART | UART |
| Moisture Sensitive | Yes | - | Yes |
| Number of Timers/Counters | 3 Timer | 3 Timer | 3 Timer |
| Processor Series | DS87C520 | DS87C520 | DS87C520 |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 28 | 500 | 26 |
| 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 | 90-87520+QCL DS87C520 | 90-87520+TCL DS87C520 | 90-87520-QCL DS87C520 |
| Unit Weight | 0.084185 oz | 0.084185 oz | 0.084185 oz |