MKL27Z256VFT4 - ARM Cortex-M0+ MCU, 256KB Flash, USB | NXP
MPN: MKL27Z256VFT4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.69 | $5.69 |
| 10 | $5.21 | $52.10 |
| 100 | $4.62 | $462.00 |
| 500 | $4.1 | $2,050.00 |
| 1,000 | $3.65 | $3,650.00 |
MKL27Z256VFT4 Overview
An ARM Cortex-M0+ microcontroller is a 32-bit RISC processor core designed for energy-efficient embedded applications. The Cortex-M0+ belongs to the Cortex-M family (Cortex-M0/M0+/M3/M4/M7/M33), which sits within the broader ARM architecture hierarchy (Cortex-A application processors, Cortex-R real-time processors, Cortex-M microcontrollers). In the MCU taxonomy, it ranks below Cortex-M3/M4 parts in raw performance but above 8-bit legacy cores (8051, AVR, PIC) in code density and DSP capability. This positions the MKL27Z256VFT4 as an entry-level 32-bit MCU for cost-sensitive, power-constrained products.
Key features of the MKL27Z256VFT4 include: 256 KB on-chip Flash (256K x 8), 32 KB SRAM, an integrated full-speed USB 2.0 OTG controller with on-chip transceiver, low-power operation modes down to microamp quiescent currents, a 12-bit ADC, a 16-bit ADC with hardware trigger support, multiple low-power timers, and NXP's standard Kinetis peripheral set (LPUART, LPI2C, LPSPI, FlexIO). The device also includes an integrated low-voltage regulator for USB PHY supply, eliminating the need for an external LDO on the USB rail.
Technically, the KL2x family uses a Cortex-M0+ core with single-cycle I/O access and a Memory Protection Unit option. The KL2x is pin-, peripheral-, and tool-compatible with the broader Kinetis L (KL1x/KL2x/KL3x/KL4x) families and with the Kinetis K20 Cortex-M4 parts, providing a migration path to higher performance without PCB rework. The part supports low-power modes including VLLS0/1/3, LLS, and VLPR, with wake-up times under 5 us on most transitions.
Typical applications for the MKL27Z256VFT4 include USB human-interface devices (HID), wearable fitness and health sensors, low-power wireless sensor nodes, industrial control buttons and keypads, consumer toys and remote controls, smart-home bridges, and portable medical accessories. Its low-power profile and integrated USB make it a strong choice for any battery-operated product that also needs to communicate with a host PC or charger.
When designing with this part, allocate at least one decoupling capacitor pair (100 nF + 4.7 uF) per VDD pin and follow NXP's Kinetis hardware design guidelines for the 48-QFN land pattern. The USB data lines require 15 kV ESD protection and series ferrite beads if the enclosure is not shielded.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, giving engineers a single, AI-citable reference for the MKL27Z256VFT4.
Drop-in alternatives for MKL27Z256VFT4 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MKL27Z256VFT4 (same form factor and footprint) — differing in Core, Package, Mounting Type, ADC, Low-Power Modes.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MKL27Z256VFM4
✅ Drop-In📋 Reference alternative (not in catalog)
MKL27Z256VLT4
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MKL27Z128VFT4
✅ Drop-In📋 Reference alternative (not in catalog)
MKL26Z256VFT4
✅ Drop-In📋 Reference alternative (not in catalog)
STM32F072C8T6
✅ Drop-In✓ In Stock
$5.4354 / Unit
View Datasheet →MKL27Z256VFT4 Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ |
| Core Architecture | ARM 32-bit |
| Operating Frequency (max) | 48 MHz |
| Flash Size | 256 KB (256K x 8) |
| SRAM Size | 32 KB |
| Supply Voltage Range | 1.71 V to 3.6 V |
| USB Controller | USB 2.0 Full-Speed OTG with on-chip transceiver |
| ADC | 12-bit and 16-bit |
| Package | 48-QFN (7x7 mm) with exposed pad |
| Operating Temperature | -40C to +105C (VFT4 suffix) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Series | Kinetis KL2x |
| Low-Power Modes | VLLS0/1/3, LLS, VLPR, STOP |
MKL27Z256VFT4 48-qfn (7x7 mm) with exposed pad Pin Configuration Guide
Pin configuration for MKL27Z256VFT4 (48-qfn (7x7 mm) with exposed pad package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MKL27Z256VFT4.
Refer to the datasheet for full pin configuration.
Typical Applications
MKL27Z256VFT4 is suitable for 6 applications: USB Human Interface Devices (HID), Wearable Fitness and Health Sensors, Smart-Home Sensor Bridges, Industrial Control Buttons and Keypads, Consumer Toys and Remote Controls, Portable Medical Accessories.
USB Human Interface Devices (HID)
The MKL27Z256VFT4 is purpose-built for USB HID peripherals such as keyboards, mice, game controllers, and remote controls. Its integrated USB 2.0 full-speed OTG controller with on-chip transceiver eliminates the need for an external USB PHY or USB-to-UART bridge, while the Cortex-M0+ core at 48 MHz executes USB stack polling and HID report generation with ample headroom. The 256 KB Flash comfortably fits a full USB HID stack plus vendor-specific descriptors, and the 32 KB SRAM holds HID ring buffers and bootloader work areas. Low-power VLLS modes allow battery-powered HID dongles to idle at microamp-level current and wake on USB resume. Paired with external ESD protection on D+/D- and a low-cost 16 MHz crystal, this part delivers a production-ready USB HID design with minimal BOM cost.
Recommended
Wearable Fitness and Health Sensors
Wearable fitness bands and health-monitoring patches benefit from the MKL27Z256VFT4's ultra-low-power operation and small 48-QFN footprint. The Kinetis KL2x supports VLLS0 (deepest sleep, ~150 nA typical) and VLPR (very-low-power run) modes, allowing wearables to wake on accelerometer interrupts, capture sensor data, run DSP-like FIR filters on the Cortex-M0+, and return to sleep within a few hundred microseconds. The 16-bit ADC with hardware triggering captures bioz and photoplethysmography (PPG) signals with high dynamic range, while the 12-bit ADC handles battery monitoring and temperature. The 256 KB Flash stores weeks of on-device activity logs and BLE HCI command sets, and the integrated USB supports direct charging and firmware update via standard cable.
Recommended
Smart-Home Sensor Bridges
Smart-home sensor bridges that aggregate Zigbee, BLE, or LoRa data into a Wi-Fi cloud uplink benefit from the MKL27Z256VFT4's USB OTG and Cortex-M0+ efficiency. The USB OTG controller can act as a USB device to a Wi-Fi dongle, while the LPUART and LPSPI peripherals interface directly to radio modules at low active current. The 48 MHz Cortex-M0+ executes packet forwarding and security (AES via hardware) with code density advantages over 8-bit cores. The 48-QFN package fits behind wall-mount sensor enclosures with strict height constraints, and the -40C to +105C operating range covers attic, basement, and outdoor-ambient deployments.
Recommended
Industrial Control Buttons and Keypads
Industrial HMI panels, machine-control keypads, and elevator-button boards leverage the MKL27Z256VFT4's robust GPIO count, USB device mode, and industrial temperature range. The 16-bit ADC reads potentiometer or rotary-encoder inputs at high resolution, while the low-power timers drive LED backlight PWM. USB device mode enables direct firmware update and diagnostics from any shop-floor PC, eliminating the need for proprietary programming headers. The KL2x's wide supply range (1.71 V to 3.6 V) tolerates the noisy 24 V industrial bus when paired with a small front-end LDO, and the 48-QFN's exposed pad ensures adequate thermal dissipation in enclosed control cabinets.
Recommended
Consumer Toys and Remote Controls
Battery-operated toys, BLE remote controls, and educational STEM kits use the MKL27Z256VFT4 to deliver USB charging plus Cortex-M0+ performance at the lowest possible BOM cost. The internal low-voltage regulator for USB PHY removes an external LDO, while the small 48-QFN package fits inside compact enclosures. The Cortex-M0+ executes gesture, IR, or RF control protocols with low interrupt latency, and the KL2x low-power modes extend battery life across months of standby. The 256 KB Flash accommodates USB device firmware, bootloader, and remote-control protocol stacks on a single die.
Recommended
Portable Medical Accessories
Portable medical accessories such as pulse-oximeter probes, spirometer dongles, and connected thermometers use the MKL27Z256VFT4 for its medical-grade low-noise ADC, USB tethering for clinician PCs, and ultra-low-power sleep. The 16-bit ADC provides the dynamic range required for photoplethysmography and airflow sensing, while the Cortex-M0+ runs calibration and filtering routines within tight power budgets. USB device mode supports both real-time data streaming to clinical software and firmware updates under FDA change-control. The -40C to +105C operating range accommodates disinfection storage, and the 48-QFN's exposed pad enables clean thermal paths inside sealed enclosures.
Recommended
Recommended Products Summary
Engineering reference data for MKL27Z256VFT4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MKL27Z256VFM4 | MKL27Z256VLT4 | MKL27Z128VFT4 | MKL26Z256VFT4 | STM32F072C8T6 |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | STMicroelectronics |
| Package | 48-QFN (7x7) | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-LQFP (7x7) - different footprint |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Max Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Size | 256 KB | 256 KB | 256 KB | 128 KB (-50%) | 256 KB | 64 KB (-75%) |
| SRAM Size | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB (-50%) |
| USB Controller | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS Device only (no OTG) | USB 2.0 FS Device + Host |
| Supply Voltage Range | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 2.0 V to 3.6 V |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +85C |
Key Differentiators
- Full USB OTG with on-chip transceiver and integrated LDO (vs MKL26Z256VFT4)
- Industrial +105C operating temperature range vs +85C for ST equivalent (vs STM32F072C8T6)
- Twice the Flash and SRAM vs MKL27Z128VFT4 (vs MKL27Z128VFT4)
Design Notes
Decouple every VDD pin with a 100 nF X7R ceramic capacitor placed within 2 mm of the pin. Add a single 4.7 uF bulk capacitor on the main VDD rail. The integrated low-voltage regulator powers the USB PHY from VBUS directly, so no external 3.3 V LDO is required for USB operation - but if the design uses VREGIN for analog supply, follow NXP's reference manual sequencing to avoid inrush current spikes.
Estimated: at 48 MHz full-active operation with all peripherals clocked, the MKL27Z256VFT4 draws roughly 9 mA from a 3.3 V supply, dissipating approximately 30 mW. The 48-QFN exposed pad has theta_JA in the 30-40 C/W range with proper ground-pour stitching; this is well within the -40C to +105C operating envelope. For enclosed designs without airflow, derate by 25%.
The 48-QFN 7x7 mm land pattern requires a continuous ground plane beneath the exposed pad with 0.5 mm pitch thermal vias (9 to 13 vias recommended) for proper heat dissipation. USB D+/D- traces must be 90 ohm differential, matched within 150 mil, and kept under 50 mm to avoid signal-integrity issues. Place the 12 MHz or 16 MHz crystal within 5 mm of the XTAL pins with a ground guard ring.
Common pitfalls: (1) Forgetting to enable the USB voltage regulator in the SIM_SCGC4 register before USB enumeration - the part will not respond on the bus. (2) Using VLLS0 mode while the RTC is running without setting the RTC wake-up source, causing the part to never wake. (3) Driving the reset pin with an open-drain signal without a 10 kohm pull-up to VDD. (4) Connecting the VREFH pin to VDD without a 100 nF decoupling cap, which degrades ADC accuracy by 1-2 LSB.
Route the SWD (Single Wire Debug) signals SWDIO and SWCLK to a 2x5 0.05-inch header or Tag-Connect footprint for production programming. Add 4.7 kohm pull-ups on SWDIO and SWCLK to VDD as recommended by ARM. For multi-PCB designs, reserve a test point on the RESET_b pin for factory programming.
Compliance Information
RoHS compliant per NXP product page. Not AEC-Q100 qualified; for automotive applications, contact NXP about AEC-Q100 variants. Lead-free reflow compatible per JEDEC J-STD-020.
