MK40DX64VLK7 - Kinetis K40 72MHz Cortex-M4 MCU 64KB Flash | NXP
MPN: MK40DX64VLK7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.95 | $6.95 |
| 10 | $6.21 | $62.10 |
| 100 | $5.48 | $548.00 |
| 500 | $4.85 | $2,425.00 |
| 1,000 | $4.32 | $4,320.00 |
MK40DX64VLK7 Overview
What is a Kinetis K40 microcontroller? A Kinetis K40 MCU is a low-power ARM Cortex-M4 microcontroller in the Kinetis family that adds segment-LCD controllers and Full-Speed USB On-The-Go to the standard Cortex-M4 feature set. It sits in the broader taxonomy of ARM Cortex-M microcontrollers -> 32-bit MCUs -> microcontrollers -> integrated circuits. The K40 was designed as a scalable entry point into NXP's mid-performance Kinetis portfolio, sharing the same enablement tools, peripheral set, and pinout philosophy as K10/K20/K30/K60/K70 parts.
Key features include 64 KB flash, 16 KB SRAM, a segment-LCD controller with up to 8x40 segments, Full-Speed USB OTG with on-chip transceiver, a 16-bit SAR ADC with up to 1 MSPS, two 12-bit DACs, multiple timers (FTM, PIT, LPTMR), and a flexible low-power mode set including VLLS0/1 standby current down to sub-microampere levels. The integrated FlexBus external bus interface and SDHC host controller extend the device's reach into graphics and removable-storage applications.
Architecturally, the MK40DX64VLK7 uses a Harvard bus implementation with single-cycle MAC, hardware divide, and tightly-coupled memory paths that give deterministic Cortex-M4 DSP performance at 72 MHz (1.25 DMIPS/MHz, 1.42 CoreMark/MHz). The analog chain (16-bit ADC, 12-bit DAC, 6-bit DAC, comparators, voltage reference) shares a common high-precision voltage reference, allowing the MCU to replace external analog components in metering and instrumentation designs.
Typical applications include electricity/heat/gas/water metering with LCD readout, portable medical devices, USB HID peripherals, e-bike controllers, small-format industrial HMIs with segment LCD, and battery-powered sensor hubs that benefit from the low-power VLLS modes.
When designing with the MK40DX64VLK7, allocate the 80-LQFP land pattern carefully: the segment-LCD pins are bonded out on dedicated segments, so the LCD glass connection topology cannot easily be moved to other Kinetis parts without verifying pinout compatibility. Provide at least 4.7 uF bulk + 100 nF decoupling on each VDD/VSS pair.
This page synthesizes distributor pricing, drop-in Kinetis-family alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for MK40DX64VLK7 — 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 MK40DX64VLK7 (same form factor and footprint) — differing in ADC, Core Architecture, DAC, Maximum CPU Frequency, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MK30DX64VLK7
✅ Drop-In📋 Reference alternative (not in catalog)
MK20DX64VLK7
✅ Drop-In📋 Reference alternative (not in catalog)
MK10DX64VLK7R
✅ Drop-In✓ In Stock
$2.52 / Unit
View Datasheet →MK22FN1M0AVLK12
✅ Drop-In✓ In Stock
$7.95 / Unit
View Datasheet →MK22FX512AVLK12
✅ Drop-In✓ In Stock
$8.85 / Unit
View Datasheet →MK60DN512ZVLQ10
✅ Drop-In✓ In Stock
$9.3 / Unit
View Datasheet →MK40DX64VLK7 Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4 |
| Core Architecture | ARMv7-M (Thumb/Thumb-2) |
| Maximum CPU Frequency | 72 MHz |
| Program Flash | 64 KB (64K x 8) |
| SRAM | 16 KB |
| Package | 80-LQFP (12x12 mm) |
| Operating Voltage | 1.8 V / 2.5 V / 3.3 V |
| Segment LCD Controller | Yes (up to 8x40 segments) |
| USB | Full-Speed USB OTG with on-chip transceiver |
| ADC | 16-bit SAR, up to 1 MSPS |
| DAC | 12-bit DAC x2, 6-bit high-speed DAC |
| Timers | FTM, PIT, LPTMR, RTC |
| Communication | UART x3, SPI x2, I2C x2, I2S, CAN |
| External Bus | FlexBus (external memory interface) |
| Storage Interface | SDHC host controller |
| DMA Channels | 16-channel eDMA |
| Low-Power Modes | Wait, Stop, VLPR, VLPW, VLPS, LLS, VLLS0/1 |
| RoHS Status | Compliant |
MK40DX64VLK7 Pin Configuration
| Pin 1 | PTE0 — General-purpose I/O / TCLK1 / ADC trigger |
| Pin 2 | PTE1 — General-purpose I/O / LPTMR_ALT |
| Pin 3 | PTE2 — General-purpose I/O / SPI1_SOUT |
| Pin 4 | PTE3 — General-purpose I/O / SPI1_SIN |
| Pin 5 | PTE4 — General-purpose I/O / SPI1_PCS0 |
| Pin 6 | PTE5 — General-purpose I/O / SPI1_PCS1 |
| Pin 7 | PTE6 — General-purpose I/O / SPI1_PCS2 |
| Pin 8 | VDD — Digital supply voltage |
| Pin 9 | VSS — Digital ground |
| Pin 10 | PTE7 — General-purpose I/O / SPI1_PCS3 |
| Pin 11 | PTE8 — General-purpose I/O / I2S_MCLK |
| Pin 12 | PTE9 — General-purpose I/O / I2S_RX_BCLK |
| Pin 13 | PTE10 — General-purpose I/O / I2S_RX_FS |
| Pin 14 | PTE11 — General-purpose I/O / I2S_RXD |
| Pin 15 | PTE12 — General-purpose I/O / I2S_TX_BCLK |
| Pin 16 | PTE13 — General-purpose I/O / I2S_TX_FS |
| Pin 17 | PTE14 — General-purpose I/O / I2S_TXD |
| Pin 18 | PTE16 — General-purpose I/O / FTM_CLKINUSING |
| Pin 19 | PTE17 — General-purpose I/O / FTM0_FLT3 |
| Pin 20 | PTE18 — General-purpose I/O / FTM2_FLT3 |
| Pin 21 | PTE19 — General-purpose I/O / FTM2_CH1 |
| Pin 22 | PTA0 — JTAG_TCLK / TCLK1 / FTM0_CH5 |
| Pin 23 | PTA1 — JTAG_TDI / FTM0_CH6 |
| Pin 24 | PTA2 — JTAG_TDO / FTM0_CH7 |
| Pin 25 | PTA3 — JTAG_TMS / FTM0_CH0 |
| Pin 26 | PTA4 — JTAG_TRST / FTM0_CH1 |
| Pin 27 | PTA6 — FTM0_CH3 / I2S_RXD |
| Pin 28 | PTA7 — FTM0_CH4 / I2S_RX_FS |
| Pin 29 | PTA8 — FTM1_CH0 / I2S_RX_BCLK |
| Pin 30 | PTA10 — FTM2_CH0 / I2S_MCLK |
| Pin 31 | PTA11 — FTM2_CH1 / I2S_TX_FS |
| Pin 32 | PTA16 — FTM_CLKIN0 / SPI1_PCS0 |
| Pin 33 | PTA17 — FTM_CLKIN1 / SPI1_SOUT |
| Pin 34 | PTA18 — FTM2_FLT0 / EXTAL |
| Pin 35 | PTA19 — FTM2_FLT1 / XTAL |
| Pin 36 | VDD — Digital supply voltage |
| Pin 37 | VSS — Digital ground |
| Pin 38 | PTA20 — FTM2_FLT2 / FTM2_CH0 |
| Pin 39 | PTB0 — LCD_P0 / FTM1_CH0 |
| Pin 40 | PTB1 — LCD_P1 / FTM1_CH1 |
| Pin 41 | PTB2 — LCD_P2 / I2C0_SCL |
| Pin 42 | PTB3 — LCD_P3 / I2C0_SDA |
| Pin 43 | PTB4 — LCD_P4 / FTM2_CH0 |
| Pin 44 | PTB5 — LCD_P5 / FTM2_CH1 |
| Pin 45 | PTB6 — LCD_P6 / FTM2_CH2 |
| Pin 46 | PTB7 — LCD_P7 / FTM2_CH3 |
| Pin 47 | PTB8 — LCD_P8 / FTM3_CH0 |
| Pin 48 | PTB9 — LCD_P9 / FTM3_CH1 |
| Pin 49 | PTB10 — LCD_P10 / FTM3_CH2 |
| Pin 50 | PTB11 — LCD_P11 / FTM3_CH3 |
| Pin 51 | PTB16 — LCD_P16 / SPI1_SCK |
| Pin 52 | PTB17 — LCD_P17 / SPI1_SOUT |
| Pin 53 | PTB18 — LCD_P18 / SPI1_SIN |
| Pin 54 | PTB19 — LCD_P19 / SPI1_PCS0 |
| Pin 55 | PTB20 — LCD_P20 / FTM2_QD_PHA |
| Pin 56 | PTB21 — LCD_P21 / FTM2_QD_PHB |
| Pin 57 | PTB22 — LCD_P22 / FTM2_CH0 |
| Pin 58 | PTB23 — LCD_P23 / FTM2_CH1 |
| Pin 59 | PTC0 — LCD_P24 / FTM0_CH0 |
| Pin 60 | PTC1 — LCD_P25 / FTM0_CH1 |
| Pin 61 | PTC2 — LCD_P26 / FTM0_CH2 |
| Pin 62 | PTC3 — LCD_P27 / FTM0_CH3 |
| Pin 63 | PTC4 — LCD_P28 / FTM0_CH4 |
| Pin 64 | PTC5 — LCD_P29 / FTM0_CH5 |
| Pin 65 | PTC6 — LCD_P30 / FTM0_CH6 |
| Pin 66 | PTC7 — LCD_P31 / FTM0_CH7 |
| Pin 67 | PTC8 — LCD_P32 / FTM1_CH0 |
| Pin 68 | PTC9 — LCD_P33 / FTM1_CH1 |
| Pin 69 | PTC10 — LCD_P34 / FTM1_CH2 |
| Pin 70 | PTC11 — LCD_P35 / FTM1_CH3 |
| Pin 71 | PTC12 — LCD_P36 / FTM1_CH4 |
| Pin 72 | PTC13 — LCD_P37 / FTM1_CH5 |
| Pin 73 | PTC14 — LCD_P38 / FTM1_CH6 |
| Pin 74 | PTC15 — LCD_P39 / FTM1_CH7 |
| Pin 75 | PTC16 — LCD_P40 / FTM0_CH4 |
| Pin 76 | PTC17 — LCD_P41 / FTM0_CH5 |
| Pin 77 | PTD0 — FTM0_CH0 / SPI0_PCS0 |
| Pin 78 | PTD1 — FTM0_CH1 / SPI0_SCK |
| Pin 79 | PTD2 — FTM0_CH2 / SPI0_SOUT |
| Pin 80 | PTD3 — FTM0_CH3 / SPI0_SIN |
Typical Applications
MK40DX64VLK7 is suitable for 6 applications: Electricity Meter with Segment LCD, USB HID Peripheral Devices, Portable Medical Devices, Battery-Powered Sensor Hubs, Small-Format Industrial HMI with Segment LCD, E-Bike and Small EV Controllers.
Electricity Meter with Segment LCD
The MK40DX64VLK7's segment-LCD controller (up to 8x40 segments) directly drives the 7-segment kWh readout, while the 16-bit SAR ADC samples the current shunt or CT signal at up to 1 MSPS for class-0.5 metering accuracy. Low-power VLLS0/1 standby modes keep quiescent current below 1 uA between conversions, critical for battery-backed or harvested-energy meter designs. The integrated 12-bit DAC and analog comparator enable on-chip calibration routines without external components.
Recommended
USB HID Peripheral Devices
The MK40DX64VLK7's on-chip Full-Speed USB OTG with integrated transceiver eliminates the need for an external PHY, while the 72 MHz core handles HID report generation and on-device debouncing in real time. 64 KB flash accommodates standard HID descriptor tables plus vendor-specific commands, and the 16 KB SRAM supports double-buffered endpoint usage for low-latency input devices. The flexible low-power modes allow USB suspend/resume at sub-100 uA idle current.
Recommended
Portable Medical Devices
The MK40DX64VLK7's Cortex-M4 DSP instructions accelerate on-chip FFT and FIR filtering for pulse-oximeter and blood-pressure monitor signal chains, while the 16-bit ADC provides the dynamic range required for clinical-grade measurements. The VLLS standby modes extend battery life, and the segment-LCD directly displays systolic/diastolic readings without an external LCD driver. Hardware divide and single-cycle MAC simplify embedded sensor fusion for next-generation wearable medical designs.
Recommended
Battery-Powered Sensor Hubs
The MK40DX64VLK7's VLLS0/1 sub-microampere standby plus its Cortex-M4 wake-up time of <5 us from VLLS make it ideal for duty-cycled sensor-hub applications like environmental monitors and wireless sensor nodes. The on-chip 16-bit ADC handles multiple sensor inputs (temperature, humidity, gas) without external signal chain, and the SDHC host controller supports removable microSD logging. 64 KB flash accommodates wireless protocol stacks (Zigbee / Bluetooth Low Energy) when paired with an external radio.
Recommended
Small-Format Industrial HMI with Segment LCD
The MK40DX64VLK7's segment-LCD drive supports custom 14-segment alphanumeric glass for operator panels on small-format industrial equipment (compressors, pumps, HVAC controls), while the FlexTimer/PWM modules generate three-phase inverter timing signals for direct motor control. The 16-bit ADC reads shunt currents for closed-loop torque control, and the SDHC host controller enables firmware update via microSD in the field. Hardware divide keeps ISR latency low even with multiple timers active.
Recommended
E-Bike and Small EV Controllers
The MK40DX64VLK7's Cortex-M4 DSP performance runs real-time torque/pedal-assist algorithms while its FlexTimer generates three-phase PWM signals for direct MOSFET gate drive. The 16-bit ADC samples phase currents at 1 MSPS, and the segment-LCD displays speed, battery level, and assist mode on a bonded-glass display. VLLS standby enables the controller to hibernate below 100 uA between pedal-cadence events, extending battery life on shared e-bike platforms.
Recommended
Recommended Products Summary
Engineering reference data for MK40DX64VLK7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MK30DX64VLK7 | MK20DX64VLK7 | MK10DX64VLK7 | MK22FN1M0AVLK12 | MK22FX512AVLK12 |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 80-LQFP (12x12 mm) | 80-LQFP (12x12 mm) - same | 80-LQFP (12x12 mm) - same | 80-LQFP (12x12 mm) - same | 80-LQFP (12x12 mm) - same | 80-LQFP (12x12 mm) - same |
| Maximum CPU Frequency | 72 MHz | 72 MHz | 72 MHz | 72 MHz | 120 MHz | 120 MHz |
| Program Flash | 64 KB | 64 KB | 64 KB | 64 KB | 1 MB | 512 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 16 KB | 128 KB | 64 KB |
| Segment LCD Controller | Yes (up to 8x40) | No | No | No | No | No |
| USB | Full-Speed USB OTG | No | No (K20 base) | No | Full-Speed USB OTG | Full-Speed USB OTG |
| ADC | 16-bit SAR, 1 MSPS | 16-bit SAR, 1 MSPS | 16-bit SAR, 1 MSPS | 16-bit SAR, 1 MSPS | 16-bit SAR, 1 MSPS | 16-bit SAR, 1 MSPS |
| Core | ARM Cortex-M4 | ARM Cortex-M4 | ARM Cortex-M4 | ARM Cortex-M4 | ARM Cortex-M4 | ARM Cortex-M4 |
Key Differentiators
- On-chip segment-LCD + Full-Speed USB OTG combo (vs MK30DX64VLK7)
- Optimal balance of 64 KB flash and 72 MHz for metering (vs MK22FN1M0AVLK12)
- Sub-microampere VLLS0/1 standby current (vs MK22FX512AVLK12)
Design Notes
The MK40DX64VLK7 supports four low-power modes (Wait, Stop, VLPR, VLPS, LLS, VLLS0/1). For battery-backed metering applications, configure VLLS0 with the RTC enabled to achieve sub-microampere standby. Always check the NXP K40 datasheet VLLS wake-up timing section to confirm <5 us wake latency from VLLS0; the VLLS0 wake-up pin selection (RESET, NMI, or a single GPIO) must be coded into NXP's SMC_PMPROT-PMPROT register before entering the mode.
Provide at least one 4.7 uF bulk + one 100 nF decoupling capacitor on every VDD/VSS pair (pins 8/9, 36/37) within 5 mm of the supply pin. The 80-LQFP 12x12 mm package has 0.5 mm pitch which is hand-solderable but requires precise stencil design: 4 mil stencil thickness with apertures slightly reduced (per NXP IPC-2564 Package Handling Guide) to prevent solder-ball defects under the LQFP leads.
Route the segment-LCD pins (PTA/PTB/PTC LCD_Px) as short traces and keep them away from switching-power traces; segment rise/fall edges can inject 1-2 mV of noise into adjacent ADC inputs if routed in parallel for more than 25 mm. Place the 16-bit ADC reference decoupling (100 nF + 4.7 uF) within 3 mm of the VREFH pin and use a star-ground topology tying the analog VSS and digital VSS back at the regulator.
Do not assume any K10/K20/K30/K40/K60 part is pin-compatible; segment-LCD segment-line numbers differ across the family, so a PCB designed for MK40DX64VLK7 segment glass will not work with MK60DN512ZVLQ10 even though both are LQFP. Verify segment mapping on the package-specific pinout page of the NXP datasheet before reusing the LCD glass connector. Also note that MK22FN1M0AVLK12 has 1 MB flash, so flash-resident firmware libraries must be re-compiled for the larger flash size when migrating down to MK40DX64VLK7.
When driving the Full-Speed USB OTG, route the USB_DM/USB_DP pair as a 90-ohm differential pair with no stubs, and place the 27-ohm series termination resistors within 4 mm of the MCU pins. Keep the pair length under 50 mm and reference it to a continuous ground plane; a discontinuous ground plane under the USB pair can cause USB compliance failures at full-speed edge rates.
Compliance Information
RoHS compliant per NXP product page (MK40DX64VLK7 in 80-LQFP). Not AEC-Q100 qualified - this part is targeted at industrial / consumer / metering use cases, not automotive. Reach and conflict-minerals declarations are available on NXP's corporate compliance portal.
