NXP Kinetis KL1 series 32-bit ARM Cortex-M0+ MCU; 48MHz core, 128KB Flash, 16KB RAM; 28 I/O, 1.71-3.6V supply; 16-bit A/D, 12-bit D/A; UART, SPI, I²C, LINbus, TSI; surface-mount 32-HVQFN (5x5mm) wettable flank; -40 to 105°C operating range; active, ROHS3 compliant.
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Specifications
| Parameter | Value |
|---|---|
| Series | Kinetis KL1 |
| Mounting type | Surface Mount, Wettable Flank |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.71V ~ 3.6V |
| Operating temperature | -40°C ~ 105°C (TA) |
| Speed | 48MHz |
| Package | Tray |
| 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, TSI, UART/USART |
| Number of i (O) | 28 |
| Core processor | ARM® Cortex®-M0+ |
| Case | 32-VFQFN Exposed Pad |
| Data converters | A/D - 16bit; D/A - 12bit |
| Program memory size | 128KB (128K x 8) |
Frequently asked questions
Does the 28-I/O count leave enough GPIOs for SPI, I²C, UART, and two PWM channels?
Roughly 18 pins remain after allocating SPI (4), I²C (2), UART (2), and two PWM outputs (2) — a usable headroom for sense inputs, fault flags, and enable signals, though a 24V fieldbus transceiver requires external logic-level translation outside the MCU itself.
What are the operating temperature limits and are there derating constraints at 105°C ambient?
The part is rated for -40 to 105°C ambient. At the high end of the range, I/O drive current and internal switching margins narrow — check the derating curves in the NXP reference manual for simultaneous-output load conditions, as the datasheet specifies maximum output current per pin that reduces above 85°C ambient.