NXP Kinetis KL2 series 32-bit ARM Cortex-M0+ MCU, MKL26Z128CAL4R, 48 MHz, 128 KB Flash, 16 KB RAM, USB OTG, I²C, SPI, UART, 12-bit ADC/DAC, 1.71–3.6 V supply, 36-WLCSP (2.37×2.46 mm), -40 to 85°C.
| Parameter | Value |
|---|---|
| Series | Kinetis KL2 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.71V ~ 3.6V |
| Operating temperature | -40°C ~ 85°C (TA) |
| Speed | 48MHz |
| Package | Tape & Reel (TR) Cut Tape (CT) |
| RAM size | 16K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, I²S, LVD, POR, PWM, WDT |
| Connectivity | I²C, LINbus, SPI, UART/USART, USB, USB OTG |
| Number of i (O) | 27 |
| Core processor | ARM® Cortex®-M0+ |
| Case | 36-UFBGA, WLCSP |
| Data converters | A/D 12bit SAR; D/A 12bit |
| Program memory size | 128KB (128K x 8) |
The NXP MKL26Z128CAL4R is a 32-bit ARM Cortex-M0+ MCU from the Kinetis KL2 series, clocked at 48 MHz with 128 KB Flash and 16 KB RAM. It carries USB OTG on-chip plus I²C, SPI, UART, and LINbus.
The 36-WLCSP (2.37 × 2.46 mm) is a wafer-level chip-scale package with no leads — the solder balls are directly on the die.
That means NXP is still manufacturing it, and there is no last-time-buy or end-of-life notice on the horizon.
The MKL26Z128CAL4R is the 36-WLCSP variant with 128 KB Flash. A pin-compatible step-up is the MKL26Z256CAL4R (256 KB Flash, same package and pinout). For a larger package with more I/O, the MKL26Z128VFT4 (48-LQFP) shares the same core and peripherals but is not footprint-compatible.
The core runs at 48 MHz, which is the maximum clock for this Cortex-M0+ device.