NXP Kinetis K20 series, MK20DX128VLH5, ARM Cortex-M4 32-bit single-core at 50 MHz, 128KB Flash / 16KB RAM / 2KB EEPROM, 40 I/O, USB OTG, SPI, I2C, UART, 13×16b ADC, 1.71–3.6 V supply, -40°C to 105°C, 64-LQFP tray.
| Parameter | Value |
|---|---|
| Series | Kinetis K20 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.71V ~ 3.6V |
| Operating temperature | -40°C~105°C(TA) |
| Speed | 50MHz |
| Package | Tray |
| RAM size | 16K x 8 |
| Core size | 32-Bit Single-Core |
| EEPROM size | 2K x 8 |
| Peripherals | DMA, I²S, LVD, POR, PWM, WDT |
| Connectivity | I²C, IrDA, SPI, UART/USART, USB, USB OTG |
| Number of i (O) | 40 |
| Core processor | ARM® Cortex®-M4 |
| Case | 64-LQFP |
| Data converters | A/D 13x16b |
| Program memory size | 128KB (128K x 8) |
The MK20DX128VLH5 is a 32-bit ARM Cortex-M4 microcontroller clocked at 50 MHz with 128 KB Flash and 16 KB RAM. The 50 MHz core speed handles real-time control loops and USB packet handling. The 128 KB Flash fits a single-protocol USB stack plus application code.
The 105°C upper limit allows placement near a warm power supply without derating.
The MK20DX128VLH5 is listed as Active — no last-time-buy or obsolescence notice.
Within the Kinetis K20 family, the 64-LQFP footprint is shared across density options (e.g., 256 KB Flash parts). The MK20DX256VLH5 is a pin-compatible drop-in with double the Flash and RAM, allowing a firmware-scaling upgrade without a board change.
The MK20DX128VLH5 runs at 50 MHz on its ARM Cortex-M4 core.