The NXP MKL43Z256VLH4557 is a 32-bit ARM Cortex-M0+ MCU from the Kinetis KL4 series, clocked at 48 MHz with 256 KB Flash and 32 KB RAM. The 48 MHz ceiling sets the interrupt latency and bus throughput for control loops and UI tasks; the 256 KB Flash covers moderate application code plus a bootloader, but leaves little headroom for large GUI stacks or over-the-air staging. The 32 KB RAM handles typical sensor data buffers and stack frames without external memory. USB connectivity is built in, so a direct PC link for firmware updates or data logging does not require an external UART-to-USB bridge.
NXP MKL43Z256VLH4557 Kinetis KL4 MCU, 48 MHz, 256 KB Flash
MPNMKL43Z256VLH4557
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NXP Kinetis KL4 series ARM Cortex-M0+ MCU, MKL43Z256VLH4557, 48 MHz, 256 KB Flash, 32 KB RAM, USB, 18-ch 16-bit ADC, 1-ch 12-bit DAC, 64-LQFP, -40 to 105 °C.
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Series | Kinetis KL4 |
| 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 | 48MHz |
| Package | Bulk |
| RAM size | 32K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | DMA, I²S, LCD, LVD, POR, PWM, WDT |
| Connectivity | I²C, SPI, UART/USART, USB |
| Number of i (O) | 50 |
| Core processor | ARM® Cortex®-M0+ |
| Case | 64-LQFP |
| Data converters | A/D 18x16b; D/A 1x12b |
| Program memory size | 256KB (256K x 8) |
Product details
Frequently asked questions
Does MKL43Z256VLH4557 have USB connectivity?
Yes, the MKL43Z256VLH4557 includes USB connectivity as part of its peripheral set.
What is the operating voltage of MKL43Z256VLH4557?
The supply voltage range is 1.71 V to 3.6 V.
What is the difference between MKL43Z256VLH4557 and MKL43Z256VLH4?
The MKL43Z256VLH4557 is a specific ordering code variant within the MKL43Z256 base product number; the suffix denotes package, temperature grade, and tape/reel options. The core silicon — 48 MHz Cortex-M0+, 256 KB Flash, 32 KB RAM — is identical across the MKL43Z256 family.