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| Lead Time | 20 Weeks , 20 Weeks , 20 Weeks , 20 Weeks , 20 Weeks |
| Flash | 128K , 128K , 128K , 128K , 128K |
| SRAM | 20K , 20K , 20K , 20K , 20K |
| Data Flash | Configurable , Configurable , Configurable , Configurable , Configurable |
| LDROM | 4K , 4K , 4K , 4K , 4K |
| I/O | 35 , 35 , 35 , 35 , 35 |
| Timer | 4*32-bit , 4*32-bit , 4*32-bit , 4*32-bit , 4*32-bit |
| UART | 3 , 3 , 3 , 3 , 3 |
| SPI | 2 , 2 , 2 , 2 , 2 |
| I2C | 2 , 2 , 2 , 2 , 2 |
| PWM | 10 , 10 , 10 , 10 , 10 |
| ADC | 9*12-bit , 9*12-bit , 9*12-bit , 9*12-bit , 9*12-bit |
| Package | QFN48 , QFN48 , QFN48 , QFN48 , QFN48 |
| Comparator | 2 , 2 , 2 , 2 , 2 |
| RTC | Y , Y , Y , Y , Y |
| ISP /ICP /IAP | Yes , Yes , Yes , Yes , Yes |
| ISO-7816-3 | 2 , 2 , 2 , 2 , 2 |
| Operating Temp. Range (°C ) | -40 to +105 , -40 to +105 , -40 to +105 , -40 to +105 , -40 to +105 |
| IRC | 10kHz， 22MHz 48MHz , 10kHz， 22MHz 48MHz , 10kHz， 22MHz 48MHz , 10kHz， 22MHz 48MHz , 10kHz， 22MHz 48MHz |
| USB | 1 , 1 , 1 , 1 , 1 |
| CRC | Y , Y , Y , Y , Y |
| I2S/ AC97 | 2 , 2 , 2 , 2 , 2 |
| PDMA | 5 , 5 , 5 , 5 , 5 |
| EBI | Yes , Yes , Yes , Yes , Yes |
| VBAT Supply | Y , Y , Y , Y , Y |
The NuMicro® NUC126 series microcontroller based on the ARM® Cortex®-M0 core operates at up to 72 MHz .
