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| PartNumber | ST72F321R6T6 | ST72F321R6T6TR | ST72F321R6T |
| Description | 8-bit Microcontrollers - MCU Flash 32K SPI/SCI/I2 | 8-bit Microcontrollers - MCU 8B MCU | |
| 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 | LQFP-64 | - |
| Series | ST72321R6 | ST72F321R6 | - |
| Core | ST7 | ST7 | - |
| Data Bus Width | 8 bit | 8 bit | - |
| Maximum Clock Frequency | 8 MHz | 8 MHz | - |
| Program Memory Size | 32 kB | 32 kB | - |
| Data RAM Size | 1 kB | 1 kB | - |
| ADC Resolution | 10 bit | 10 bit | - |
| Number of I/Os | 48 I/O | 48 I/O | - |
| Operating Supply Voltage | 3.8 V to 5.5 V | - | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Packaging | Tray | Reel | - |
| 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 | - | - |
| Interface Type | I2C, SCI, SPI | I2C, SCI, SPI | - |
| Moisture Sensitive | Yes | Yes | - |
| Number of ADC Channels | 16 | 16 | - |
| Number of Timers/Counters | 5 Timer | 2 Timer | - |
| Processor Series | ST72F3x | ST72F3x | - |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 540 | 1000 | - |
| 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 | 0.012088 oz | - |
| Product | - | MCU | - |