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| PartNumber | HD64F3644H | HD64F3644H8 | HD64F3644HA |
| Description | MicroController, 8-Bit, 64 Pin, Plastic, QFP | ||
| Manufacturer | Renesas Electronics America | - | HITACHI |
| Product Category | Embedded - Microcontrollers | - | IC Chips |
| Series | H8R H8/300L | - | - |
| Packaging | Tray | - | - |
| Package Case | 64-BQFP | - | - |
| Operating Temperature | -20°C ~ 75°C (TA) | - | - |
| Supplier Device Package | 64-QFP (14x14) | - | - |
| Number of I O | 53 | - | - |
| Speed | 8MHz | - | - |
| EEPROM Size | - | - | - |
| Core Processor | H8/300L | - | - |
| RAM Size | 1K x 8 | - | - |
| Program Memory Type | FLASH | - | - |
| Peripherals | PWM, WDT | - | - |
| Connectivity | SCI | - | - |
| Voltage Supply Vcc Vdd | 2.7 V ~ 5.5 V | - | - |
| Core Size | 8-Bit | - | - |
| Program Memory Size | 32KB (32K x 8) | - | - |
| Data Converters | A/D 8x8b | - | - |
| Oscillator Type | Internal | - | - |