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| PartNumber | ST72F521R9T3 | ST72F521R9T6 | ST72F521R9TA |
| Description | 8-bit Microcontrollers - MCU Flash 60K SPI/I2C/SC | 8-bit Microcontrollers - MCU Flask 60K SPI/SCI/I2 | IC MCU 8BIT 60KB FLASH 64LQFP |
| Manufacturer | STMicroelectronics | STMicroelectronics | - |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | TQFP-64 | TQFP-64 | - |
| Series | ST72521R9 | ST72521R9 | - |
| Core | ST7 | ST7 | - |
| Data Bus Width | 8 bit | 8 bit | - |
| Maximum Clock Frequency | 8 MHz | 8 MHz | - |
| Program Memory Size | 60 kB | 60 kB | - |
| Data RAM Size | 2 kB | 2 kB | - |
| ADC Resolution | 10 bit | 10 bit | - |
| Number of I/Os | 64 I/O | 64 I/O | - |
| Operating Supply Voltage | 3.8 V to 5.5 V | 3.8 V to 5.5 V | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 125 C | + 85 C | - |
| Packaging | Tray | Tray | - |
| Height | 1.4 mm | 1.4 mm | - |
| Length | 14 mm | 14 mm | - |
| Program Memory Type | Flash | Flash | - |
| Width | 14 mm | 14 mm | - |
| Brand | STMicroelectronics | STMicroelectronics | - |
| Data ROM Type | Flash | Flash | - |
| Interface Type | CAN, I2C, SCI, SPI | CAN, I2C, SCI, SPI | - |
| Moisture Sensitive | Yes | Yes | - |
| Number of ADC Channels | 16 | 16 | - |
| Number of Timers/Counters | 5 Timer | 5 Timer | - |
| Processor Series | ST72F5x | ST72F5x | - |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 540 | 540 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Supply Voltage Min | 3.8 V | 3.8 V | - |
| Unit Weight | 0.012720 oz | 0.012720 oz | - |