MKL04Z16VLF4 - 48MHz Cortex-M0+ MCU 16KB Flash | NXP
MPN: MKL04Z16VLF4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.85 | $28.50 |
| 100 | $2.4 | $240.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.75 | $1,750.00 |
MKL04Z16VLF4 Overview
What is a Kinetis KL0x microcontroller? The Kinetis KL0x family is NXP's entry-level ultra-low-power 32-bit MCU line based on the ARM Cortex-M0+ core. It sits at the base of the Kinetis L series hierarchy: Cortex-M0+ core -> ARM Cortex family -> 32-bit MCU -> microcontroller -> semiconductor. The family provides a bridge for 8-bit users transitioning to 32-bit performance while retaining low-power simplicity.
Key features include 16 KB of embedded Flash, 2 KB of SRAM, a low-power ARM Cortex-M0+ core running at up to 48 MHz, multiple low-power modes (Wait, Stop, VLPR, VLPS, LLS, VLLS0/1/3), and an operating voltage range of 1.71V to 3.6V. The MKL04Z16VLF4 also integrates peripherals such as 12-bit ADC, analog comparator, low-power UART, low-power timer, and an SPI/I2C capable serial interface, providing ample connectivity for cost-sensitive designs.
The device uses a Cortex-M0+ core with single-cycle I/O access and a Harvard bus architecture, achieving 0.95 DMIPS/MHz performance. On-chip peripherals operate directly from the ARM core through AMBA AHB-Lite, enabling deterministic real-time behavior. The KL04 sub-family is the smallest memory variant in the KL0x line, optimized for applications requiring minimal RAM and Flash.
Typical applications include battery-powered sensor nodes, wearable fitness bands, electronic shelf labels, remote controls, low-end portable medical devices, and 8-bit replacement upgrades. The 1.71V minimum supply and sub-µA deep-sleep currents make it ideal for coin-cell powered products.
When designing with this part, attention must be paid to the 48-LQAF pinout including analog reference pins (VREFH/VREFL) and the choice of reset configuration to ensure boot mode selection. A 0.1 µF decoupling capacitor close to each VDD/VSS pair is recommended, and unused analog inputs should be tied to a defined voltage to avoid ADC leakage.
This page synthesizes distributor pricing, drop-in Kinetis alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for MKL04Z16VLF4 — 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 MKL04Z16VLF4 (same form factor and footprint) — differing in Core Architecture, Low-Power Modes, Package, SRAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MKL04Z16VFM4
✅ Drop-In📋 Reference alternative (not in catalog)
MKL04Z16VFK4
✅ Drop-In📋 Reference alternative (not in catalog)
MKL04Z32VLF4
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →MKL04Z8VLF4
✅ Drop-In📋 Reference alternative (not in catalog)
STM32F051C4T6
✅ Drop-In📋 Reference alternative (not in catalog)
STM32F102C4T6A
✅ Drop-In📋 Reference alternative (not in catalog)
MKL04Z16VLF4 Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M0+ |
| Core Bit Width | 32-bit |
| Maximum Clock Frequency | 48 MHz |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 2 KB |
| Supply Voltage Range | 1.71 V to 3.6 V |
| Operating Temperature Range | -40 C to +105 C |
| Package | 48-LQFP (LFQFP), 7x7 mm |
| Pin Count | 48 |
| Communication Interfaces | I2C, SPI, UART (LPUART) |
| Low-Power Modes | Wait, Stop, VLPR, VLPS, LLS, VLLS0/1/3 |
| MSL Level | 3 |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Series | Kinetis KL0x |
MKL04Z16VLF4 Pin Configuration
| Pin 1 | PTA0/IRQ0/TCLK1 — General I/O / External interrupt / Timer clock input |
| Pin 2 | PTA1/LLWU_P0/RESET_b — General I/O / Low-leakage wakeup / Reset (default) |
| Pin 3 | PTA2/SWDIO — General I/O / Serial Wire Debug I/O |
| Pin 4 | PTA3/SWDCLK — General I/O / Serial Wire Debug Clock |
| Pin 5 | PTA4/NMI_b — General I/O / Non-Maskable Interrupt |
| Pin 6 | VDD — Supply voltage |
| Pin 7 | VSS — Ground |
| Pin 8 | PTB0/LLWU_P4/ADC0_SE0 — General I/O / Low-leakage wakeup / ADC0 channel 0 |
| Pin 9 | PTB1/ADC0_SE1 — General I/O / ADC0 channel 1 |
| Pin 10 | PTB2/ADC0_SE2 — General I/O / ADC0 channel 2 |
| Pin 11 | PTB3/ADC0_SE3 — General I/O / ADC0 channel 3 |
| Pin 12 | PTB4/ADC0_SE4 — General I/O / ADC0 channel 4 |
| Pin 13 | PTB5/ADC0_SE5 — General I/O / ADC0 channel 5 |
| Pin 14 | PTC0/EXTAL0 — General I/O / External clock input |
| Pin 15 | PTC1/XTAL0 — General I/O / Crystal oscillator input |
| Pin 16 | PTC2/ADC0_SE6 — General I/O / ADC0 channel 6 |
| Pin 17 | PTC3/ADC0_SE7 — General I/O / ADC0 channel 7 |
| Pin 18 | PTC4/LLWU_P8 — General I/O / Low-leakage wakeup |
| Pin 19 | PTC5/LLWU_P9 — General I/O / Low-leakage wakeup |
| Pin 20 | PTC6 — General I/O |
| Pin 21 | PTC7 — General I/O |
| Pin 22 | PTD0 — General I/O |
| Pin 23 | PTD1 — General I/O |
| Pin 24 | PTD2 — General I/O |
| Pin 25 | PTD3 — General I/O |
| Pin 26 | PTD4 — General I/O |
| Pin 27 | PTD5 — General I/O |
| Pin 28 | PTE0 — General I/O |
| Pin 29 | PTE1 — General I/O |
| Pin 30 | PTE2 — General I/O |
| Pin 31 | PTE3 — General I/O |
| Pin 32 | PTE4 — General I/O |
| Pin 33 | PTE5 — General I/O |
| Pin 34 | VSS — Ground |
| Pin 35 | VDD — Supply voltage |
| Pin 36 | PTE16 — General I/O |
| Pin 37 | PTE17 — General I/O |
| Pin 38 | PTE18 — General I/O |
| Pin 39 | PTE19 — General I/O |
| Pin 40 | VREFH — ADC voltage reference high |
| Pin 41 | VREFL — ADC voltage reference low |
| Pin 42 | VSS — Ground |
| Pin 43 | VDD — Supply voltage |
| Pin 44 | PTF0 — General I/O |
| Pin 45 | PTF1 — General I/O |
| Pin 46 | PTF2 — General I/O |
| Pin 47 | PTF3 — General I/O |
| Pin 48 | NC — Not connected (per datasheet) |
Typical Applications
MKL04Z16VLF4 is suitable for 6 applications: Battery-Powered Sensor Nodes, Wearable Fitness Bands, Electronic Shelf Labels, Remote Controls, Low-End Portable Medical Devices, 8-bit Replacement Upgrade.
Battery-Powered Sensor Nodes
The MKL04Z16VLF4 fits battery-powered wireless sensor nodes because its 1.71-3.6V supply directly accepts 2x AA alkaline or single Li-ion cells, and its VLLS0 standby mode draws sub-µA current. The 48 MHz Cortex-M0+ core handles periodic sensor reads, encryption, and short RF transmissions within tight energy budgets. 16 KB Flash is sufficient for BLE beacon firmware, simple sensor fusion, and over-the-air update stubs. The 2 KB SRAM accommodates modest buffer queues for I2C/SPI sensor data, and the integrated 12-bit ADC enables direct battery voltage monitoring. Compared to switching regulators, its low quiescent current extends battery life by months in duty-cycled deployments.
Recommended
Wearable Fitness Bands
The MKL04Z16VLF4 targets wearable fitness bands where its 7x7 mm 48-LQFP footprint fits inside small enclosures while the Cortex-M0+ core processes step-count, heart-rate, and accelerometer data. Its sub-µA VLLS0 mode preserves coin-cell capacity during standby, and the integrated 12-bit ADC pairs directly with optical heart-rate sensors. 16 KB Flash accommodates proprietary BLE stack profiles, and 2 KB SRAM buffers IMU sample bursts. The 1.71V minimum supply enables direct CR2032 cell operation without boost circuitry, reducing BOM cost and PCB area.
Recommended
Electronic Shelf Labels
The MKL04Z16VLF4 drives electronic shelf labels (ESL) because its low-power architecture and 48 MHz Cortex-M0+ core balance display refresh performance with battery longevity. The 16 KB Flash stores display templates and RF protocol stacks, and 2 KB SRAM handles partial display buffers. Its 1.71-3.6V supply supports direct coin-cell or printed battery operation, eliminating boost converters. VLLS0 standby extends battery life to 5+ years in duty-cycled ESL networks where the MCU wakes hourly for sub-second RF updates.
Recommended
Remote Controls
The MKL04Z16VLF4 serves universal remote controls by combining Cortex-M0+ performance with deep-sleep current below 1 µA, enabling years of operation on AAA batteries. The 48 MHz core debounces key matrices and runs IR protocol stacks in firmware; 16 KB Flash stores multiple protocol libraries (RC5, NEC, SIRC). The 2 KB SRAM is adequate for buffer-free IR modulation. Its integrated UART enables wireless MCU co-existence, and the 48-LQFP supports through-hole-friendly hand-soldering for prototyping.
Recommended
Low-End Portable Medical Devices
The MKL04Z16VLF4 fits low-end portable medical devices such as pulse oximeters, digital thermometers, and pill dispensers because its Cortex-M0+ deterministic behavior and integrated 12-bit ADC simplify FDA documentation. The 1.71-3.6V supply accepts 2x AAA cells, and the 16 KB Flash stores device firmware and calibration tables. Low-power modes extend battery life across multi-day patient monitoring cycles. The 48-LQFP package supports standard reflow profiles, easing contract manufacturer assembly.
Recommended
8-bit Replacement Upgrade
The MKL04Z16VLF4 enables direct migration from legacy 8-bit microcontrollers such as 8051, PIC16, and ATmega families. The 48 MHz Cortex-M0+ delivers roughly 10x the DMIPS of typical 8-bit cores while retaining simple C-friendly programming. 16 KB Flash and 2 KB SRAM map closely to common 8-bit memory sizes, easing software porting. The 48-LQFP package matches many 8-bit pinouts (e.g., ATmega644/1284 in 40/44-pin), enabling board-level upgrades with minimal PCB rework.
Recommended
Recommended Products Summary
Engineering reference data for MKL04Z16VLF4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MKL04Z16VFM4 | MKL04Z16VFK4 | MKL04Z32VLF4 | MKL04Z8VLF4 | STM32F051C4T6 | STM32F102C4T6A |
|---|---|---|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | STMicroelectronics | STMicroelectronics |
| Core Architecture | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0 | ARM Cortex-M3 |
| Maximum Clock Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 16 KB | 16 KB | 16 KB | 32 KB | 8 KB | 16 KB | 16 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 4 KB | 4 KB |
| 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 | 2.0 V to 3.6 V |
| Operating Temperature Range | -40 C to +105 C | -40 C to +85 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Smaller Flash than MKL04Z32VLF4 in the same package (vs MKL04Z32VLF4)
- Lower SRAM than STM32F051C4T6 (vs STM32F051C4T6)
- Cortex-M0+ efficiency vs STM32F1 Cortex-M3 (vs STM32F102C4T6A)
Design Notes
Place a 1.0 µF bulk capacitor plus a 100 nF decoupling capacitor close to each VDD/VSS pin pair on the MKL04Z16VLF4. The 1.71-3.6V supply range allows direct coin-cell operation without boost converters, but high di/dt during GPIO transitions can cause VDD sag if decoupling is inadequate. For battery-powered designs, a 10 µF bulk on VDD is recommended to handle RF transmit bursts if an external radio is co-located. Estimated: at 48 MHz core clock with all peripherals active, total supply current reaches roughly 5 mA; deep-sleep VLLS0 drops to sub-µA levels.
The 48-LQFP package dissipates heat primarily through the perimeter ground pins. At 48 MHz with all peripherals enabled, the MKL04Z16VLF4 typically consumes under 10 mA, so thermal management is rarely an issue. However, in sealed enclosures with elevated ambient temperatures (above +85 C), ensure adequate PCB copper around the ground pins to keep junction temperature within the -40 C to +105 C operating range. Estimated: at +105 C ambient, the LQFP's theta_JA of roughly 75 C/W allows the MCU to dissipate approximately 250 mW before derating becomes mandatory.
Route the SWDIO and SWCLK signals (PTA2/PTA3 on the MKL04Z16VLF4) with short, direct traces to a 4-pin or 10-pin debug header. Avoid routing these signals near high-frequency switching nodes or analog inputs to prevent noise coupling during debug. The VREFH and VREFL pins should be bypassed with 100 nF ceramic capacitors placed within 5 mm of the pins. Analog and digital ground planes should be joined at a single point under the MCU to avoid ground loops that degrade 12-bit ADC performance.
Do not assume the RESET_b pin (shared with PTA1/LLWU_P0) is always configured as reset. The NXP Kinetis KL04 datasheet documents the FOPT reset configuration bytes that select between PTA1 as GPIO, LLWU input, or RESET_b at boot. Forgetting to program FOPT can leave the MCU in an unexpected debug-locked state. Additionally, ensure unused analog inputs are tied to a defined voltage (VREFH, VREFL, or VSS) to prevent ADC leakage currents. The 16 KB Flash variant cannot accommodate all KL0x peripheral libraries - profile code size before committing to the MKL04Z16VLF4 for complex applications.
Compliance Information
RoHS and REACH compliant per NXP product page. Not AEC-Q100 qualified - choose a higher-grade Kinetis part for automotive.
