NXP Semiconductors MK40DX128VLK7

Overview

MK40DX128VLK7 from NXP (formerly Freescale) is a Kinetis K40-series ARM Cortex-M4 microcontroller with DSP extension, 128 KB flash, 72 MHz max CPU frequency, operating from 1.71–3.6 V across –40 to 105°C ambient. It integrates dual 16-bit SAR ADCs with PGA, 12-bit DAC, USB OTG, CAN, LCD controller, and low-power timers - deployed in industrial motor control and embedded HMI systems.

For engineers reviewing the MK40DX128VLK7 datasheet, MK40DX128VLK7 pinout, MK40DX128VLK7 application, or MK40DX128VLK7 equivalent, key selection considerations include its 80-pin LQFP package, 72 MHz real-time performance, integrated analog subsystem, USB/CAN dual-protocol support, and multi-mode power management for battery-backed operation.

Technical Context

The MK40DX128VLK7 implements an ARM Cortex-M4 core with DSP instructions and no FPU, paired with a Multi-Mode Clock Generator (MCG) supporting crystal, internal oscillator, and PLL-based clock sources up to 72 MHz. Its memory subsystem includes 128 KB on-chip flash with FlexMemory partitioning capability and 16 KB SRAM.

Peripherals are organized into domain-specific clock gates: two independent ADCs each with programmable gain amplifier (x1–x64), three analog comparators with integrated 6-bit DACs, eight-channel PWM timer, two quadrature decoder timers, RTC with battery backup, and full-speed USB OTG with on-chip transceiver - all operating within the same voltage and temperature envelope.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (12 mm × 12 mm), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with MK40DX128VLK7, MK40DX256VLK7 offers scalable flash without layout change, while MK22FN512VLH12 delivers higher compute density at the cost of peripheral mismatch and board rework - making MK40DX128VLK7 optimal for cost-sensitive, analog-rich, display-enabled industrial designs.

Availability

MK40DX128VLK7 is available at Aetrix Electronics and suitable for industrial motor control, medical patient monitors, automotive body modules, and smart energy meters requiring stable component supply across extended temperature and long product lifecycles.

Supply support for MK40DX128VLK7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.

The MK40DX128VLK7 belongs to the Kinetis K40 microcontroller family, designed specifically for cost-optimized, mixed-signal embedded systems demanding rich analog integration, low-power operation, and dual-protocol connectivity in harsh environments.

FAQ

What is the maximum operating frequency of the MK40DX128VLK7?

The MK40DX128VLK7 operates at a maximum CPU frequency of 72 MHz, achieved using the internal PLL with a 3–32 MHz crystal input. This frequency is fully supported across the entire –40 to 105°C temperature range and 1.71–3.6 V supply voltage, enabling deterministic real-time execution for motor control and communication stacks without derating.

Does the MK40DX128VLK7 include a hardware floating-point unit (FPU)?

No, the MK40DX128VLK7 implements the ARM Cortex-M4 core with DSP extensions but does not include a hardware FPU. Its "D" suffix in the part number (MK40D…) explicitly denotes DSP-only capability. Applications requiring floating-point math must use software libraries or consider FPU-equipped variants like MK40Fxxx series.

Can the MK40DX128VLK7 drive an LCD display directly?

Yes, the MK40DX128VLK7 integrates a segment LCD controller supporting up to 36 frontplanes and 8 backplanes (or 40 frontplanes and 4 backplanes), enabling direct drive of multiplexed character or graphic LCDs without external controllers. This capability is validated in the K40P81M72SF1 datasheet and requires proper configuration of VDDLCD and bias voltage settings.

What low-power modes are supported by the MK40DX128VLK7?

The MK40DX128VLK7 supports seven low-power modes: RUN, WAIT, VLPR, STOP, VLPS, LLS, and VLLS (VLLS0–VLLS3). VLLS3 achieves as low as 1.9 μA at 3.0 V and –40 to 25°C while retaining RTC, 32 KB RAM, and wakeup capability - ideal for battery-backed applications requiring long-term timekeeping and state retention.

Is the MK40DX128VLK7 pin-compatible with other K40 family members?

The MK40DX128VLK7 shares the same 80-pin LQFP (LK) package footprint with MK40DX64VLK7 and MK40DX256VLK7, making them mechanically and electrically pin-compatible. However, differences in flash size and minor peripheral enablement require firmware validation; no changes to PCB layout are needed for migration between these LK-package K40 variants.