MKL46Z256VMC4 - 48MHz Cortex-M0+ MCU, 256KB Flash | NXP
MPN: MKL46Z256VMC4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.86 | $7.86 |
| 10 | $7.2 | $72.00 |
| 100 | $6.65 | $665.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.6 | $5,600.00 |
MKL46Z256VMC4 Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals such as timers, communication interfaces, and analog converters on one die. Within the embedded systems hierarchy, an MCU sits at the application-control level below application processors, and NXP's Kinetis KL4x family occupies the ultra-low-power, entry-level 32-bit segment of that hierarchy, positioned above 8-bit MCUs and beside the Kinetis K series.
Key differentiating features include run-mode power consumption down to 50 uA/MHz in very low power run mode, a segment LCD controller for driving glass displays directly, and a rich peripheral suite spanning analog, communication, and timing blocks. Code compatibility with all other Kinetis L families and the K4x family simplifies platform scaling and design reuse.
Technically, the Cortex-M0+ core uses a two-stage von Neumann pipeline with low gate count, delivering efficient MIPS/mA for battery-operated designs. Multiple low-power modes, including a compute mode that keeps peripherals active while core dynamic power is reduced, enable duty-cycled systems to achieve multi-year battery life. The USB device controller supports human-interface and data-logging endpoints without external transceivers.
Typical applications include electronic scales, flow meters, smart meters, and thermostats, where the segment LCD controller and low standby power are decisive. USB-connected portable instruments and sensor nodes also benefit.
Design tip: budget the 8x8 mm MAPBGA footprint for via-in-pad or escape routing; verify that your LCD glass segment count matches the controller capability before layout freeze.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for MKL46Z256VMC4 — 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 MKL46Z256VMC4 (same form factor and footprint) — differing in Mounting Type, Package, Core Processor, Low-Power Modes, Maximum Clock Frequency.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MKL46Z128VMC4
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MK21DN512VMC5
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
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View Datasheet →MKL46Z256VMC4 Maximum Ratings & Electrical Characteristics
| Core Processor | ARM Cortex-M0+ |
| Core Size | 32-Bit |
| Maximum Clock Frequency | 48 MHz |
| Flash Memory | 256 KB (256K x 8) |
| SRAM | 32 KB |
| Series | Kinetis KL4 |
| Sub-Family | Kinetis KL46 |
| USB Controller | USB 2.0 Full-Speed Device |
| Segment LCD Controller | Yes |
| Run Power Consumption | Down to 50 uA/MHz (very low power run mode) |
| Package | 121-MAPBGA (8x8 mm) |
| Mounting Type | Surface Mount |
| Peripherals | Analog, communication, timing and control peripherals |
| Low-Power Modes | Multiple, including very low power run and compute mode |
| Family Compatibility | Code compatible with Kinetis L families and Kinetis K4x |
| Supplier Device Package | 121-MAPBGA |
MKL46Z256VMC4 121-mapbga Pin Configuration Guide
Pin configuration for MKL46Z256VMC4 (121-mapbga 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 MKL46Z256VMC4.
Refer to the datasheet for full pin configuration.
Typical Applications
MKL46Z256VMC4 is suitable for 6 applications: Smart Meters, Electronic Scales, Thermostats and HVAC Controls, Flow Meters, USB Data Loggers and Portable Instruments, Industrial Sensor Nodes and IoT Endpoints.
Smart Meters
The MKL46Z256VMC4 fits smart electricity, water, and gas meters because it combines a segment LCD controller, ultra-low 50 uA/MHz run power, and multiple sleep modes that dominate the duty-cycled energy profile of metering products. In a typical design, the MCU wakes periodically from a low-power mode via an RTC or tamper interrupt, samples metrology data through its analog peripherals, updates the LCD glass directly without an external driver, and communicates over UART or USB. The 256 KB flash accommodates metrology firmware plus protocol stacks such as DLMS/COSEM application layers, while the 32 KB SRAM buffers session data. Estimated battery-life gains versus an 8-bit solution stem from faster task completion at low clock rates and deep static power savings.
Recommended
Electronic Scales
Electronic retail and industrial scales are a flagship application named by NXP for the Kinetis KL4x family. The MKL46Z256VMC4 drives the weight display through its integrated segment LCD controller, reads a load-cell front end via its ADC, and applies digital filtering and calibration in the Cortex-M0+ core at 48 MHz. Very low power run mode (down to 50 uA/MHz) and static power savings extend battery operation in portable scales, while the USB 2.0 full-speed device controller allows point-of-sale or PC connectivity without an external transceiver. The 256 KB flash stores multi-point calibration tables, tare logic, and multi-language UI strings. Designers should budget the 121-ball MAPBGA footprint for LCD routing density in compact housing PCBs.
Recommended
Thermostats and HVAC Controls
Connected and battery-backed thermostats benefit from the MKL46Z256VMC4's segment LCD controller for temperature and setpoint display, its rich timer and communication peripherals for scheduling, and its deep low-power modes that keep standby current in the microamp range between wakeups. The Cortex-M0+ core executes PID control loops with ample margin at 48 MHz, while the 256 KB flash supports OTA-style firmware update staging and protocol handling. USB full-speed device connectivity enables commissioning and diagnostics via a laptop without adding a USB-UART bridge. According to NXP, thermostats are an explicitly targeted KL4x application, and code compatibility with the wider Kinetis L and K4x families allows a single firmware base to scale across product tiers.
Recommended
Flow Meters
Flow measurement in water and industrial process instruments requires pulse or analog capture, LCD readout, and years of battery operation - three requirements the MKL46Z256VMC4 addresses directly. Its timer peripherals capture turbine or Hall-sensor pulses with precise timing, the ADC conditions analog flow sensors, and the segment LCD controller renders flow rate and totalized volume on glass displays without external driver ICs. Very low power run at 50 uA/MHz and aggressive static power modes allow continuous low-rate sampling in solar- or battery-powered installations. The 256 KB flash retains logging tables and calibration curves, and USB device connectivity supports field configuration tools. NXP lists flow meters explicitly among the target applications for the Kinetis KL4x family.
Recommended
USB Data Loggers and Portable Instruments
Battery-powered data loggers use the MKL46Z256VMC4's integrated USB 2.0 full-speed device controller to offload logged data to a PC without a separate USB interface chip, reducing BOM cost and board area. The 32 KB SRAM buffers sensor samples between USB sessions, the 256 KB flash supports double-buffered firmware update images, and the Cortex-M0+ core at 48 MHz handles time-stamping and compression. Between transfers the device resides in deep low-power modes, waking on RTC or sensor interrupts to record new readings; run power of 50 uA/MHz keeps active sampling efficient. This application suits environmental monitoring, asset tracking fixtures, and lab instruments where USB is the primary service interface and display feedback is desirable.
Recommended
Industrial Sensor Nodes and IoT Endpoints
The MKL46Z256VMC4 serves as the main controller in industrial sensor nodes where local LCD status indication, multiple serial interfaces, and duty-cycled low power coexist. Its analog, communication, timing and control peripheral suite - as described by NXP for the KL4x family - integrates ADC acquisition, UART/I2C/SPI links to radio modules or gateways, and PWM/timer outputs for actuators. Very low power run mode and compute mode, which reduces dynamic power by keeping peripherals active while trimming core power, suit nodes that sample continuously but compute intermittently. The 256 KB flash carries protocol stacks and local buffering, and code compatibility across Kinetis L and K4x families lets a validated design scale up to more powerful family members without board redesign when requirements grow.
Recommended
Recommended Products Summary
Engineering reference data for MKL46Z256VMC4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MKL46Z128VMC4 | MK21DN512VMC5 |
|---|---|---|---|
| Package | 121-MAPBGA (8x8 mm) | 121-MAPBGA (8x8 mm) - same | 121-MAPBGA (8x8 mm) - same footprint |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | ARM Cortex-M0+ (32-bit) | ARM Cortex-M0+ | ARM Cortex-M4 |
| Flash Memory | 256 KB | 128 KB | 512 KB |
| Segment LCD Controller | Yes | Yes | No |
Key Differentiators
- Integrated segment LCD controller (vs MK21DN512VMC5)
- Ultra-low run power (vs MK21DN512VMC5)
- Maximum flash in the 121-MAPBGA KL46 family (vs MKL46Z128VMC4)
Design Notes
The 121-ball MAPBGA (8x8 mm) uses approximately 0.8 mm ball pitch, requiring fine-pitch escape routing. Plan via-in-pad or dog-bone fanout on outer rows and reserve at least two inner routing layers for ball-map escape. Decouple each VDD ball with 100 nF ceramics placed within 2 mm of the via, plus one bulk 10 uF per supply rail. Verify LCD segment ball assignments against the datasheet ball map before locking the footprint, since shared-function balls vary by multiplexing configuration.
To realize the 50 uA/MHz very low power run figure, run from the internal clock sources where timing permits and disable unused peripheral clock gates in the SIM module. Estimated: at 48 MHz full utilization, dynamic current is on the order of 50 uA/MHz x 48 MHz = 2.4 mA before peripheral loads; a 2000 mAh Li-SOCl2 cell could then support roughly 8000 hours of continuous run, far longer when duty-cycled in sleep modes. Always validate with your own firmware profile.
Do not assume software compatibility is automatic across KL46 flash sizes: the 128 KB variant changes flash addressing and leaves less room for OTA staging. When migrating to the MK21DN512VMC5 (same footprint family), note that the Cortex-M4 adds a different interrupt vector table and clocking architecture, and the segment LCD controller is absent - display code must be re-implemented. Subscribe to NXP Product Change Notices for the KL46 family before long production commitments.
Compliance Information
NXP's product page lists an Environmental Quality section for this part, but specific RoHS/REACH status was not included in the retrieved data. Consult nxp.com/part/MKL46Z256VMC4 for certified compliance documents.
