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| Lead Time | 20 Weeks , 20 Weeks , 20 Weeks , 20 Weeks , 20 Weeks |
| Flash | 32 , 32 , 32 , 32 , 32 |
| SRAM | 8 , 8 , 8 , 8 , 8 |
| Data Flash | Configurable , Configurable , Configurable , Configurable , Configurable |
| LDROM | 4K , 4K , 4K , 4K , 4K |
| I/O | 15 , 15 , 15 , 15 , 15 |
| Timer | 4*32-bit , 4*32-bit , 4*32-bit , 4*32-bit , 4*32-bit |
| UART | 2 , 2 , 2 , 2 , 2 |
| I2C | 2 , 2 , 2 , 2 , 2 |
| PWM | 9 , 9 , 9 , 9 , 9 |
| ADC | 7 , 7 , 7 , 7 , 7 |
| ISP/ICP/IAP | Yes , Yes , Yes , Yes , Yes |
| Package | TSSOP20 , TSSOP20 , TSSOP20 , TSSOP20 , TSSOP20 |
| Status | Mass Production , Mass Production , Mass Production , Mass Production , Mass Production |
| ISO-7816-3 | 1 , 1 , 1 , 1 , 1 |
| Operating Temp. Range (°C ) | -40 to +105 , -40 to +105 , -40 to +105 , -40 to +105 , -40 to +105 |
| PDMA | 5 , 5 , 5 , 5 , 5 |
| Quad SPI | 1 , 1 , 1 , 1 , 1 |
The industrial-grade NuMicro M251 / M252 series designed for industrial control applications.
