NXP Semiconductors MKM14Z64CHH5

Overview

MKM14Z64CHH5 from NXP Semiconductors (formerly Freescale) is a 50 MHz ARM Cortex-M0+ microcontroller optimized for smart metering and low-power industrial sensing applications. It integrates 64 KB flash, 16 KB RAM, a 24-bit Sigma-Delta AFE with PGA (gain up to 32), dual 16-bit SAR ADCs, and segment LCD controller supporting up to 36×8 segments - enabling high-accuracy energy measurement with on-chip analog signal conditioning and human interface.

For engineers reviewing the MKM14Z64CHH5 datasheet, MKM14Z64CHH5 pinout, MKM14Z64CHH5 application, or MKM14Z64CHH5 equivalent, key selection considerations include its -40°C to +85°C operating range, 1.71–3.6 V supply flexibility (with AFE requiring ≥2.7 V), 44-pin 5 mm × 5 mm LGA package, and support for multiple low-power stop modes down to 0.35 μA (VLLS0, POR disabled).

Technical Context

The MKM14Z64CHH5 implements a dual-domain clock architecture with independent MCG and 32 kHz RTC oscillator, enabling precise timekeeping while maintaining system responsiveness. Its AFE subsystem includes two 24-bit Sigma-Delta ADCs, programmable gain amplifier, and hardware averaging - all operating at up to 6.5 MHz modulator clock in normal mode and 1.6 MHz in VLPR mode.

System-level power management is handled by a multi-mode controller supporting RUN, WAIT, STOP, VLPR, VLPS, and four VLLS sub-modes, with configurable wake-up sources including asynchronous wakeup unit, low-leakage wakeup unit, and external interrupts. Memory protection is enforced via MPU with multi-master access control and 4-channel DMA supporting 64 request sources.

Key Specifications

Pinout & Package

Package: 44-pin LGA (5 mm × 5 mm), thermally enhanced with exposed die pad. Pin assignments follow KM Family Pinout Table 8.2 (Rev. 7, Jan 2014), with dedicated AFE analog inputs, LCD segment/backplane drivers, and dual crystal oscillator connections (1–32 MHz main, 32 kHz RTC).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKM14Z64CHH5, MKM14Z128CHH5 offers flash scalability without changing PCB layout, while MKM33Z64CLH5 trades compactness for expanded analog I/O and package size - making MKM14Z64CHH5 optimal for cost- and space-constrained single-phase meter designs.

Availability

MKM14Z64CHH5 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and battery-backed energy monitoring systems requiring stable component supply across extended product lifecycles.

Supply support for MKM14Z64CHH5 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 markets, with deep expertise in ultra-low-power microcontrollers and metrology-grade analog IP.

The MKM14Z64CHH5 belongs to NXP's Kinetis KM family - designed specifically for utility metering applications requiring high-precision analog measurement, long-term battery operation, and integrated human-machine interface capabilities.

FAQ

What is the maximum operating frequency of the MKM14Z64CHH5?

The MKM14Z64CHH5 operates at a maximum system and core clock frequency of 50 MHz, enabled by its ARM Cortex-M0+ core and Multi-purpose Clock Generator. This frequency is supported across the full -40°C to +85°C temperature range when supplied within the specified 2.7–3.6 V range (AFE active) or 1.71–3.6 V (AFE inactive). The MKM14Z64CHH5 achieves 0.95 Dhrystone MIPS per MHz, delivering deterministic real-time performance for metrology algorithms.

Does the MKM14Z64CHH5 support hardware encryption or secure boot?

The MKM14Z64CHH5 does not integrate dedicated cryptographic accelerators (AES, SHA, RSA) or secure boot ROM. However, it provides foundational security features including a hardware random-number generator, 128-bit unique identification number per chip, and memory protection unit (MPU) with multi-master access control - enabling developers to implement certified secure boot and firmware update schemes in software using external secure elements or trusted execution environments.

What LCD configurations does the MKM14Z64CHH5 support?

The MKM14Z64CHH5's integrated segment LCD controller supports two configurations: up to 36 frontplanes × 8 backplanes (288 segments) or 40 frontplanes × 4 backplanes (160 segments). This flexibility allows direct drive of common utility meter displays without external drivers. The controller includes charge pump, contrast control, and blinking functionality - all managed autonomously to reduce CPU load during display updates.

Can the MKM14Z64CHH5 operate from a single 3.3 V supply with the AFE enabled?

Yes, the MKM14Z64CHH5 can operate from a single 3.3 V supply with the Analog Front End (AFE) enabled, as its AFE operating voltage range is specified as 2.7 V to 3.6 V. At 3.3 V, the AFE delivers full 24-bit resolution with hardware averaging, PGA gains up to 32, and modulator clock up to 6.5 MHz - meeting Class 0.5S metrology requirements when paired with proper layout and filtering per the MKMxxZxxCxx5 datasheet guidelines.

What is the lowest power consumption mode available on the MKM14Z64CHH5?

The lowest power consumption mode on the MKM14Z64CHH5 is Very Low-Leakage Stop Mode 0 (VLLS0) with POR detect circuit disabled, drawing as little as 0.35 μA at 3.0 V and 25°C. In this mode, the RTC remains powered via VBAT, allowing calendar tracking and alarm wake-up while minimizing total system current - enabling >10-year battery life in tamper-detection or backup-clock applications.