MKM14Z128CHH5 - Kinetis KM Cortex-M0+ 128KB Flash MCU | NXP
MPN: MKM14Z128CHH5 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.27 | $4.27 |
| 10 | $3.95 | $39.50 |
| 100 | $3.62 | $362.00 |
| 500 | $3.28 | $1,640.00 |
| 1,000 | $2.94 | $2,940.00 |
MKM14Z128CHH5 Overview
A microcontroller (MCU) is a single-chip computer containing a processor core, non-volatile program memory, RAM, and a rich set of peripherals used to sense, control, and communicate with the physical world. MCUs sit at the heart of embedded systems across consumer, industrial, and infrastructure markets, and ARM Cortex-M0+ cores specifically target ultra-low-power applications while retaining enough performance for digital signal processing and complex state machines. The Kinetis KM family extends this baseline with metrology-optimized analog front ends that simplify BOM and PCB area in smart-meter deployments.
Key features include 128 KB Flash, 16 KB SRAM, a precision analog front end (AFE) with 24-bit sigma-delta ADC channels, a low-drift internal voltage reference, hardware tamper detection, and a true random number generator (TRNG). Security and integrity modules protect memory and metering data, while low-power run and wait modes with full RAM retention support battery-backed metering and idle duty cycles.
The MKM14Z128CHH5 uses a high-performance ARM Cortex-M0+ core with single-cycle I/O access, multi-layer bus matrix, and a 24-bit metrology AFE implemented as sigma-delta modulators with decimation filters. The integrated AFE achieves sub-0.1% accuracy across the industrial temperature range, simplifying metrology calibration and reducing external component count. The combination of a hardware security module, secure Flash, and tamper pins meets common smart-meter security specifications.
Typical applications include single-phase and polyphase electricity meters, water/gas/heat flow meters, smart energy monitoring nodes, and industrial precision instrumentation. The wide operating temperature range and integrated analog front end make it well suited for harsh utility environments and field-deployed metering endpoints.
When designing with this part, allocate the analog front-end inputs to dedicated AFE pins and follow the reference layout in the manufacturer datasheet to achieve published accuracy. Decouple VDD/VREF rails with low-ESR ceramic capacitors placed close to the pins, and use the tamper pins in accordance with the application note guidance for meter anti-tamper enclosures.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for MKM14Z128CHH5 — 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 MKM14Z128CHH5 (same form factor and footprint) — differing in Package, Security Features.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MKM14Z128CHH5R
✅ Drop-In📋 Reference alternative (not in catalog)
MKM14Z128VLL5
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MKM34Z256VLQ7
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MKM14Z128CHH5 Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ |
| Core Width | 32-bit |
| Max CPU Frequency | 50 MHz |
| Program Memory Size | 128 KB (128K x 8) Flash |
| RAM Size | 16 KB |
| Package | 44-MAPLGA (5x5 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C |
| ADC | 24-bit sigma-delta (metrology AFE) |
| Internal Voltage Reference | High-precision, low temperature drift |
| Security Features | Memory protection, tamper detection, TRNG |
| RoHS Status | Compliant |
| Lifecycle Status | NRND (Not Recommended for New Designs) |
MKM14Z128CHH5 Pin Configuration
| Pin 1 | PTA0 — General purpose I/O / AFE channel (verify against datasheet) |
| Pin 2 | PTA1 — General purpose I/O / AFE channel (verify against datasheet) |
| Pin 3 | PTA2 — General purpose I/O (verify against datasheet) |
| Pin 4 | PTA3 — General purpose I/O (verify against datasheet) |
| Pin 5 | PTA4 — General purpose I/O (verify against datasheet) |
| Pin 6 | PTA5 — General purpose I/O (verify against datasheet) |
| Pin 7 | PTA6 — General purpose I/O (verify against datasheet) |
| Pin 8 | PTA7 — General purpose I/O (verify against datasheet) |
| Pin 9 | VREFH — ADC high reference voltage (verify against datasheet) |
| Pin 10 | VREFL — ADC low reference voltage (verify against datasheet) |
| Pin 11 | VDDA — Analog supply voltage (verify against datasheet) |
| Pin 12 | VSSA — Analog ground (verify against datasheet) |
| Pin 13 | AFE_IN1P — Analog front-end positive input (verify against datasheet) |
| Pin 14 | AFE_IN1N — Analog front-end negative input (verify against datasheet) |
| Pin 15 | AFE_IN2P — Analog front-end positive input (verify against datasheet) |
| Pin 16 | AFE_IN2N — Analog front-end negative input (verify against datasheet) |
| Pin 17 | PTB0 — General purpose I/O (verify against datasheet) |
| Pin 18 | PTB1 — General purpose I/O (verify against datasheet) |
| Pin 19 | PTB2 — General purpose I/O (verify against datasheet) |
| Pin 20 | PTB3 — General purpose I/O (verify against datasheet) |
| Pin 21 | PTB4 — General purpose I/O (verify against datasheet) |
| Pin 22 | PTB5 — General purpose I/O (verify against datasheet) |
| Pin 23 | PTC0 — General purpose I/O (verify against datasheet) |
| Pin 24 | PTC1 — General purpose I/O (verify against datasheet) |
| Pin 25 | PTC2 — General purpose I/O (verify against datasheet) |
| Pin 26 | PTC3 — General purpose I/O (verify against datasheet) |
| Pin 27 | PTC4 — General purpose I/O (verify against datasheet) |
| Pin 28 | PTC5 — General purpose I/O (verify against datasheet) |
| Pin 29 | PTC6 — General purpose I/O (verify against datasheet) |
| Pin 30 | PTC7 — General purpose I/O (verify against datasheet) |
| Pin 31 | TAMPER0 — Tamper detection input (verify against datasheet) |
| Pin 32 | TAMPER1 — Tamper detection input (verify against datasheet) |
| Pin 33 | RESET_b — Reset input, active low (verify against datasheet) |
| Pin 34 | VDD — Digital supply voltage (verify against datasheet) |
| Pin 35 | VSS — Digital ground (verify against datasheet) |
| Pin 36 | PTD0 — General purpose I/O (verify against datasheet) |
| Pin 37 | PTD1 — General purpose I/O (verify against datasheet) |
| Pin 38 | PTD2 — General purpose I/O (verify against datasheet) |
| Pin 39 | PTD3 — General purpose I/O (verify against datasheet) |
| Pin 40 | PTD4 — General purpose I/O (verify against datasheet) |
| Pin 41 | PTD5 — General purpose I/O (verify against datasheet) |
| Pin 42 | PTD6 — General purpose I/O (verify against datasheet) |
| Pin 43 | PTD7 — General purpose I/O (verify against datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
Typical Applications
MKM14Z128CHH5 is suitable for 6 applications: Single-Phase Electricity Meter, Three-Phase Polyphase Electricity Meter, Water/Gas/Heat Flow Meter, Smart Energy Monitoring Node, Industrial Precision Instrumentation, Building Automation Submeter.
Single-Phase Electricity Meter
The MKM14Z128CHH5's integrated 24-bit sigma-delta analog front end, low-drift internal voltage reference, and hardware tamper pins make it a single-chip solution for class 0.2/0.5 single-phase electricity meters. The 128 KB Flash hosts the metrology library, DLMS/COSEM stack, and tamper event log, while the Cortex-M0+ at 50 MHz performs real-time energy calculations. Unlike discrete AFE + MCU designs, this part eliminates an external ADC and reference, shrinking PCB area for in-home meter enclosures.
Recommended
Three-Phase Polyphase Electricity Meter
For polyphase metering the MKM14Z128CHH5's multiple AFE input channels sample three voltage and three current signals simultaneously, computing active/reactive/apparent energy per phase and total. The 50 MHz Cortex-M0+ sustains harmonic analysis up to the 63rd order required by IEC 62053-22 class 0.2S, and 16 KB SRAM buffers waveform data for power-quality diagnostics. A real-time clock and tamper detection secure time-of-use billing against field attacks.
Recommended
Water/Gas/Heat Flow Meter
Beyond electricity, the MKM14Z128CHH5 drives flow-meter designs that use pulse outputs from turbine or ultrasonic sensors, leveraging the AFE for low-frequency sensor conditioning and the tamper module for anti-fraud enclosures. The 128 KB Flash stores calibration curves and Wireless M-Bus or LoRaWAN stacks, while low-power modes with full RAM retention extend battery life to 10+ years. Hardware security protects consumption data integrity against physical and remote tampering.
Recommended
Smart Energy Monitoring Node
The MKM14Z128CHH5 anchors a smart-energy monitoring node that aggregates household circuit-level power measurements and publishes them over M-Bus, Wi-SUN, or RF mesh. The Cortex-M0+ at 50 MHz handles DLMS/COSEM encryption plus the metering DSP, while 128 KB Flash leaves room for OTA firmware updates over the meter's lifetime. The integrated tamper module logs cover-open and magnetic tamper events for forensic billing audits.
Recommended
Industrial Precision Instrumentation
Industrial precision measurement tasks benefit from the MKM14Z128CHH5's 24-bit sigma-delta AFE and low-drift reference to digitize low-level signals from strain gauges, RTDs, or load cells with sub-0.1% accuracy across -40C to +85C. The 50 MHz Cortex-M0+ executes filtering, linearization, and PID loops in real time, while the tamper pins detect enclosure intrusion in field installations. Industrial-grade temperature range and security module meet harsh-environment requirements.
Recommended
Building Automation Submeter
In commercial submetering and BMS nodes, the MKM14Z128CHH5 measures branch-circuit power and communicates upstream via BACnet, Modbus, or KNX. The integrated AFE removes the need for external CT conditioning electronics, reducing BOM and assembly cost across multi-channel submeter boards. The 16 KB SRAM sustains Modbus transaction buffers and trend logging with minimal external memory.
Recommended
Recommended Products Summary
Engineering reference data for MKM14Z128CHH5 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MKM14Z128CHH5R | MKM14Z128VLL5 | MKM34Z256VLQ7 |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 44-MAPLGA (5x5 mm) | 44-MAPLGA (5x5 mm) - same | 44-MAPLGA (5x5 mm) - same | LQFP-144 - different |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Max Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Flash Size | 128 KB | 128 KB | 128 KB | 256 KB |
| Integrated Metrology AFE | Yes (24-bit sigma-delta) | Yes (24-bit sigma-delta) | Yes (24-bit sigma-delta) | Yes |
Key Differentiators
- Integrated 24-bit sigma-delta metrology analog front end (vs MKM34Z256VLQ7)
- Compact 44-MAPLGA 5x5 mm package (vs MKM34Z256VLQ7)
- Hardware tamper detection and security module (vs Generic Cortex-M0+ MCU)
Design Notes
Decouple the MKM14Z128CHH5 digital VDD/VSS and analog VDDA/VSSA rails with low-ESR ceramic capacitors placed close to the package. A typical 100 nF plus 10 uF combination on each rail suppresses switching noise from the Cortex-M0+ core and isolates the 24-bit sigma-delta ADC reference. The integrated analog front end is sensitive to high-frequency digital noise, so separate analog and digital ground returns to a star point near the IC ground pin.
Route the AFE input traces (AFE_IN1P/N, AFE_IN2P/N) as short, balanced differential pairs and keep them away from switching digital lines. Place the burden resistors and shunt current sensors close to the IC pads to minimize parasitic capacitance. The Kinetis KM1x reference design in the manufacturer datasheet provides a recommended PCB layout for class 0.2S accuracy - follow it for production designs.
Use the integrated low-drift voltage reference for the metrology ADC. Avoid driving the VREF pin with external references unless the datasheet explicitly permits it. For harmonic analysis above the 50th order, ensure the AFE sampling rate is configured per the metrology library guidance and that the anti-aliasing filter cutoff aligns with the chosen decimation factor.
Do not rely solely on software tamper detection. Wire the dedicated TAMPER0/TAMPER1 pins to optical switches or magnetic sensors on the meter enclosure so that tamper events trigger hardware actions even when the MCU is in a low-power state. Always validate Flash security lock bits in production programming to prevent external read-out of calibration constants and billing data.
Compliance Information
RoHS and REACH compliance per NXP environmental disclosures. NRND lifecycle status warrants successor evaluation for new designs.
