| PartNumber | ST72F521AR9T6 | ST72F521AR6T6 | ST72F521AR9TC |
| Description | 8-bit Microcontrollers - MCU Flask 60K SPI/SCI/I2 | 8-bit Microcontrollers - MCU ST72F521 ST72521B 8B MCU | 8-bit Microcontrollers - MCU Flask 60K SPI/SCI/I2 |
| Manufacturer | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| 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 | TQFP-64 | TQFP-64 | TQFP-64 |
| Series | ST72521AR9 | ST72F521AR6 | ST72F521AR9 |
| Core | ST7 | ST7 | ST7 |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 8 MHz | 8 MHz | 8 MHz |
| Program Memory Size | 60 kB | 32 kB | 60 kB |
| Data RAM Size | 2 kB | 1 kB | 2 kB |
| ADC Resolution | 10 bit | 10 bit | 10 bit |
| Number of I/Os | 64 I/O | 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 | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 125 C |
| Packaging | Tray | Tray | Tray |
| Height | 1.4 mm | 1.4 mm | 1.4 mm |
| Length | 10 mm | 10 mm | 10 mm |
| Program Memory Type | Flash | Flash | Flash |
| Width | 10 mm | 10 mm | 10 mm |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Data ROM Type | Flash | - | Flash |
| Interface Type | CAN, I2C, SCI, SPI | CAN, I2C, SCI, SPI | CAN, I2C, SCI, SPI |
| Moisture Sensitive | Yes | Yes | Yes |
| Number of ADC Channels | 16 | 16 | 16 |
| Number of Timers/Counters | 5 Timer | 2 Timer | 5 Timer |
| Processor Series | ST72F5x | ST72F5x | ST72F5x |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 960 | 960 | 160 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage Min | 3.8 V | 3.8 V | 3.8 V |
| Unit Weight | 0.012720 oz | 0.012720 oz | 0.012720 oz |