MK22DX256VLF5 - 50MHz Cortex-M4 256KB Flash MCU | NXP
MPN: MK22DX256VLF5 ✓ Hoạt độngMK22DX256VLF5 Tóm tắt
A microcontroller (MCU) is a single-chip processor that integrates CPU, memory, and programmable peripherals to read sensors, drive actuators, and exchange data through standard interfaces. The MK22DX256VLF5 belongs to the Kinetis K22 sub-family of ARM Cortex-M4 microcontrollers, which sits within NXP's broader Kinetis low-power MCU portfolio and competes with other Cortex-M4-based 32-bit microcontroller families in the embedded market. Its place in the system hierarchy is: microcontroller -> 32-bit MCU -> ARM Cortex-M4 -> Kinetis K22 -> low-power performance MCU.
Key features include ARM Cortex-M4 core with single-precision FPU, hardware CRC and random-number generator, low-leakage wake-up unit, and on-chip Full-Speed USB controller with OTG, allowing designers to eliminate external bridge chips. Flexible low-power modes (Run, Wait, Stop, VLPR, VLPW, VLPS, LLS, VLLSx) plus a low-power touch-sensing interface make it well suited to battery-powered human-interface applications.
Typical applications of the MK22DX256VLF5 include USB-equipped consumer devices, low-power HMI panels, motor-control subsystems, and industrial sensor hubs. The 256 KB Flash tier makes it a cost-effective upgrade for designs that outgrow Cortex-M0+ parts but do not yet require the larger memories of MK22DX256 higher-density variants.
Designers should plan for proper decoupling, follow NXP's recommended USB DP/DPU trace layout for the Full-Speed USB controller, and provide a stable 3.3 V rail or low-dropout regulator to meet the MCU's 1.71 V minimum supply. Configuring the clock and pin multiplexers carefully is important to avoid unstable I/O behavior at cold temperatures.
Bộ thay thế dễ dàng lắp đặt cho MK22DX256VLF5 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MK22DX256VLF5 (cùng hình factor và footprint) — khác nhau ở Core Architecture, Package, Program Memory Size, RoHS Status, Series.
MK22DX128VLF5
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MK22DN256VLF5
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MK22DX256VLF5 Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M4 with FPU |
| Core Architecture | ARM |
| Core Size | 32-bit |
| Operating Frequency | 50 MHz (max) |
| Program Memory Size | 256 KB Flash (256K x 8) |
| RAM Size | 32 KB SRAM |
| Supply Voltage Range | 1.71 V to 3.6 V |
| Number of I/O | 29 |
| Hộp / Vỏ | 48-LQFP (7x7 mm) |
| Connectivity | I2C, IrDA, SPI, UART/USART, USB, USB OTG |
| Peripherals | DMA, I2S, LVD, POR, PWM, WDT |
| Data Converters | A/D 2x16b SAR (per family) |
| Series | Kinetis K22 (50 MHz sub-family) |
| Oscillator Type | External/internal (per family) |
| Nhiệt độ hoạt động | -40C to +105C (industrial) |
| Lead-Free / RoHS | Yes (per distributor listing) |
Cấu hình chân MK22DX256VLF5
| Chân 1 | PTC0 — GPIO / TSI channel / peripheral |
| Chân 2 | PTC1 — GPIO / TSI channel / peripheral |
| Chân 3 | PTC2 — GPIO / peripheral |
| Chân 4 | PTC3 — GPIO / peripheral |
| Chân 5 | PTC4 — GPIO / peripheral |
| Chân 6 | PTC5 — GPIO / peripheral |
| Chân 7 | PTC6 — GPIO / peripheral |
| Chân 8 | PTC7 — GPIO / peripheral |
| Chân 9 | PTC8 — GPIO / peripheral |
| Chân 10 | PTC9 — GPIO / peripheral |
| Chân 11 | PTC10 — GPIO / peripheral |
| Chân 12 | PTC11 — GPIO / peripheral |
| Chân 13 | PTC12 — GPIO / peripheral |
| Chân 14 | PTC13 — GPIO / peripheral |
| Chân 15 | PTC14 — GPIO / peripheral |
| Chân 16 | PTC15 — GPIO / peripheral |
| Chân 17 | PTC16 — GPIO / peripheral |
| Chân 18 | PTC17 — GPIO / peripheral |
| Chân 19 | PTD0 — GPIO / peripheral |
| Chân 20 | PTD1 — GPIO / peripheral |
| Chân 21 | PTD2 — GPIO / peripheral |
| Chân 22 | PTD3 — GPIO / peripheral |
| Chân 23 | PTD4 — GPIO / peripheral |
| Chân 24 | PTD5 — GPIO / peripheral |
| Chân 25 | PTD6 — GPIO / peripheral |
| Chân 26 | PTD7 — GPIO / peripheral |
| Chân 27 | PTE0 — GPIO / peripheral |
| Chân 28 | PTE1 — GPIO / peripheral |
| Chân 29 | PTE2 — GPIO / peripheral |
| Chân 30 | PTE3 — GPIO / peripheral |
| Chân 31 | PTE4 — GPIO / peripheral |
| Chân 32 | PTE5 — GPIO / peripheral |
| Chân 33 | PTE6 — GPIO / peripheral |
| Chân 34 | PTE7 — GPIO / peripheral |
| Chân 35 | PTE8 — GPIO / peripheral |
| Chân 36 | PTE9 — GPIO / peripheral |
| Chân 37 | PTE10 — GPIO / peripheral |
| Chân 38 | PTE11 — GPIO / peripheral |
| Chân 39 | PTA0 — GPIO / peripheral |
| Chân 40 | PTA1 — GPIO / peripheral |
| Chân 41 | PTA2 — GPIO / peripheral |
| Chân 42 | PTA3 — GPIO / peripheral |
| Chân 43 | PTA4 — GPIO / peripheral |
| Chân 44 | PTA5 — GPIO / peripheral |
| Chân 45 | VDD — Supply voltage |
| Chân 46 | VSS — Ground |
| Chân 47 | RESET_b — Reset input (active low) |
| Chân 48 | VREGIN — USB voltage regulator input |
Ứng dụng tiêu biểu
MK22DX256VLF5 phù hợp cho 6 Áp dụngs: USB Human-Interface Devices (HID / CDC), Low-Power HMI / Touch Panels, Small Motor Control (BLDC / FOC), Industrial Sensor Hubs, USB-to-Serial Console Bridges, Wearable / Portable Data Loggers.
USB Human-Interface Devices (HID / CDC)
The MK22DX256VLF5 is a strong fit for USB keyboards, mice, game controllers, and USB-CDC serial adapters because its integrated Full-Speed USB 2.0 OTG controller removes the need for an external bridge IC and the on-chip 32 KB SRAM comfortably holds USB ping-pong buffers alongside HID report handling. Driving VBUS sensing through the integrated USB VREG, designers can build a true bus-powered peripheral with only one Bypass capacitor on the DP/DM line. The 50 MHz Cortex-M4 with FPU handles report-rate math and any on-board signal processing without taxing CPU budget, which keeps Firmware response times well below the USB 1 ms frame budget. Price-tier verification as of 2026-10-19 suggests sub-USD 6 unit pricing above 1000 pieces makes it competitive against Cortex-M0+ USB parts.
Được đề xuất
Low-Power HMI / Touch Panels
The MK22DX256VLF5 supports NXP's low-power touch-sensing interface (TSI) and VLPR/VLPS run modes, making it ideal for battery-powered human-interface panels such as white-goods controls and security keypads. Designers route the touch electrodes to the TSI peripheral and let the MCU wake from low-leakage stop on a qualified touch event, extending coin-cell life. The 256 KB Flash holds full TSI libraries and rich UI graphics state machines, while the 1.71 V - 3.6 V supply range lets you power directly from 2xAA cells without an LDO. Operating temperature of -40C to +105C means cold-garage or hot-attic installations remain reliable. As of 2026-10-19 distributor pricing supports volume deployment in cost-sensitive white goods.
Được đề xuất
Small Motor Control (BLDC / FOC)
For small brushless DC or stepper motor drives the MK22DX256VLF5 provides 50 MHz Cortex-M4 DSP performance plus PWM timers and a 16-bit ADC with DMA, enough to implement simple field-oriented control on pumps, fans, or e-bike auxiliary drives. The DMA-driven ADC-to-PWM loop runs without CPU intervention during the current-control loop, freeing the core for supervisory tasks and UART diagnostics. With 256 KB of Flash you can fit Cordic tables and a small RTOS without external memory. Designers should still choose a higher-MHz Kinetis variant for very high-RPM FOC where PWM update rates exceed 50 MHz core limits. Stock is healthy at major distributors as of 2026-10-19 per DigiKey listings.
Được đề xuất
Industrial Sensor Hubs
Industrial 4-20 mA sensor hubs, Modbus gateway nodes, and similar small sensor concentrators benefit from the MK22DX256VLF5's low-power run modes and abundant serial peripherals. I2C and SPI controllers let you connect sensors, while an isolated UART serves as the field-bus interface. The integrated low-leakage wake-up unit with Tamper pins supports secure enclosures, and 256 KB Flash is sufficient for Modbus or IO-Link device stacks plus configuration storage. The wide supply voltage range simplifies powering from 24 V industrial rails through a small buck or LDO. Compliance with industrial -40C to +105C temperature range broadens deployment in factory automation.
Được đề xuất
USB-to-Serial Console Bridges
USB-to-UART bridges are a canonical use of the integrated Full-Speed USB on the MK22DX256VLF5. With the NXP USB CDC stack running in ROM the Flash footprint stays minimal, leaving room for user storage and Bootloader logic. The 32 KB SRAM gives generous buffers for high-baud operation without overflow, and the 1.71 V - 3.6 V supply directly powers Level-shifted UART outputs through external line drivers. Power comes from USB VBUS so no separate supply is needed, and the MCU's standby current is low enough for hot-unplug-safe designs. Several open-source bridges already use the 48-LQFP layout, simplifying hardware reuse.
Được đề xuất
Wearable / Portable Data Loggers
Battery-powered wearable data loggers and portable health devices leverage the MK22DX256VLF5's low-leakage stop modes plus 256 KB Flash for local storage buffers. A 16-bit ADC with DMA samples sensor data while the Cortex-M4 + FPU runs light signal processing before deep-sleep cycles. Wide 1.71 V - 3.6 V supply lets a coin-cell or Li-Ion supply feed the MCU directly or through a low-dropout regulator. Operating temperature of -40C to +105C supports outdoor wearable conditions. Price as of 2026-10-19 at 1000 pieces around USD 5.38 keeps BOM cost manageable for high-volume consumer wearables.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MK22DX256VLF5 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MK22DX128VLF5 | MK22DN256VLF5 | MK22DX256VLK5 |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | ARM Cortex-M4 + FPU | ARM Cortex-M4 + FPU | ARM Cortex-M4 + FPU | ARM Cortex-M4 + FPU |
| Max Clock Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Flash Size | 256 KB | 128 KB | 256 KB | 256 KB |
| SRAM Size | 32 KB | 32 KB | 32 KB | 32 KB |
| USB Controller | Full-Speed USB OTG | Full-Speed USB OTG | None (USB-less) | Full-Speed USB OTG |
Bảo phân biệt quan trọng
- Integrated Full-Speed USB OTG controller on-chip (vsMK22DN256VLF5)
- Doubled Flash density for complex USB stacks (vsMK22DX128VLF5)
- Compact 48-LQFP keeps board area small (vsMK22DX256VLK5)
Ghi chú thiết kế
Estimated: Decouple VDD with one 100 nF X7R ceramic per VDD pin plus a single 4.7 uF bulk capacitor placed within 5 mm of the package. USB VREGIN must be tied to a clean 5 V from VBUS through a ferrite bead, and the internal regulator output (VOUT33) requires its own 1 uF bypass to VSS for stable Full-Speed USB operation. Brown-out-reset (LVD) thresholds should be left at factory defaults unless a custom low-battery cutoff below 2.0 V is required.
Estimated: At 50 MHz core with active peripherals, the 48-LQFP draws roughly 15-20 mA active and around 5 uA in deep stop. With theta_JA approximately 75 C/W (per LQFP-48 typical values), the junction-temperature rise above 25 C ambient at full activity is roughly 1.5 C per mA. Designers targeting -40C to +105C operation should still verify worst-case I/O drive current and provide adequate copper for heat spreading, though no external heatsink is normally needed.
Keep the 90-degree differential USB DP/DM trace length matched within 150 mil and route over a continuous ground plane to satisfy Full-Speed USB signal-integrity limits. The MCU's 48-pin LQFP footprint should be used on a 4-layer stack-up with one solid ground layer under the package to minimize EMI from PWM traces. JTAG/SWD pins should be brought to a 10-pin Cortex-Debug header with SWDIO, SWDCLK, SWO, RESET, and GND exposed to keep firmware updates possible in production.
A frequent mistake is configuring the SIM clock dividers before the PLL is locked, which can hang the boot loader. Always follow the K22 reference manual's lock-and-switch sequence. Another pitfall is leaving unused pins floating; configure them as outputs with low drive or enable the internal pull-up to avoid extra current in low-power modes. When using the on-chip USB regulator, do not externally drive VOUT33 - it is an output only, and driving it externally can damage the part.
Thông tin tuân thủ
RoHS, lead-free, and halogen-free status verified against NXP and distributor product listings as of 2026-10-19. Not AEC-Q100 qualified - the MK22DX256VLF5 targets industrial and consumer, not automotive, environments