NXP Semiconductors MKM14Z128CHH5R

Overview

MKM14Z128CHH5R from NXP Semiconductors (formerly Freescale) is a 50 MHz ARM Cortex-M0+ microcontroller optimized for smart metering and low-power industrial sensing. It integrates 128 KB flash, 16 KB RAM, dual 24-bit Sigma-Delta AFEs with PGA (up to 32× gain), 16-bit SAR ADC, LCD controller (36×8 or 40×4), and operates from 1.71–3.6 V across –40°C to +85°C ambient.

For engineers reviewing the MKM14Z128CHH5R datasheet, MKM14Z128CHH5R pinout, MKM14Z128CHH5R application, or MKM14Z128CHH5R equivalent, key selection criteria include AFE resolution and gain range, ultra-low-power stop modes (down to 0.35 µA in VLLS0), segment LCD drive capability, and dual SPI/I²C/UART interfaces with ISO7816 support for utility meter communication stacks.

Technical Context

This device belongs to the KM family's M3 subfamily-metering-focused with integrated LCD and high-precision analog front ends. Its dual 24-bit Sigma-Delta ADCs (with programmable gain amplifiers up to 32×) and 16-bit SAR ADC enable simultaneous high-resolution metrology and auxiliary sensing. The iRTC supports battery-backed calendaring, and the Peripheral Crossbar enables flexible signal routing between modules without software overhead.

The MCU implements multiple low-power modes including VLLS0 (0.35 µA), VLLS3 (1.98 µA), and VLPS (8.56 µA), all retaining RAM and register context. Clock architecture includes 1–32 MHz crystal oscillator, 32 kHz RTC crystal input, and multi-purpose clock generator supporting dynamic frequency scaling between 2 MHz (VLPR) and 50 MHz (RUN).

Key Specifications

Pinout & Package

Package: 44-pin LGA (5 mm × 5 mm, HH suffix), 0.5 mm pitch, exposed thermal pad - suitable for compact meter PCB layouts with constrained board area and thermal dissipation needs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKM14Z128CHH5R, MKE15Z128VLL7 offers automotive qualification but omits LCD and dual AFE; MKL27Z128VLH7 reduces BOM cost by removing metrology-specific analog blocks, making it viable only where Class 0.5 accuracy suffices.

Availability

MKM14Z128CHH5R is available at Aetrix Electronics and suitable for smart metering, utility infrastructure monitoring, and battery-powered industrial sensing requiring stable component supply, long-term lifecycle assurance, and metrology-grade analog performance.

Supply support for MKM14Z128CHH5R 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 microcontrollers and analog signal processing.

The KM family-including MKM14Z128CHH5R-is designed specifically for utility metering applications, integrating high-precision analog front ends, LCD controllers, and ultra-low-power modes to meet international metrology standards (IEC 62053, ANSI C12).

FAQ

What is the maximum operating frequency of the MKM14Z128CHH5R core?

The MKM14Z128CHH5R features an ARM Cortex-M0+ core rated for up to 50 MHz operation under specified voltage and temperature conditions. This frequency is achievable with the main crystal oscillator (1–32 MHz) and internal clock generator configured in FBE mode, delivering 0.95 Dhrystone MIPS per MHz for deterministic real-time metering calculations.

Does the MKM14Z128CHH5R support battery-backed real-time clock functionality?

Yes, the MKM14Z128CHH5R includes an independent RTC (iRTC) with battery backup support via the VBAT pin. It accepts 1.71–3.6 V on VBAT, retains calendar, alarms, and tamper registers during main power loss, and supports 32 kHz crystal input for high-accuracy timekeeping essential in billing-grade metering applications.

What analog peripherals are integrated into the MKM14Z128CHH5R?

The MKM14Z128CHH5R integrates three distinct analog subsystems: (1) dual 24-bit Sigma-Delta AFEs with programmable gain amplifiers (up to 32×), (2) a 16-bit SAR ADC, and (3) two analog comparators with integrated 6-bit DACs and programmable reference inputs-enabling simultaneous high-accuracy energy measurement and auxiliary sensor monitoring.

What package type does the MKM14Z128CHH5R use, and what are its key mechanical attributes?

The MKM14Z128CHH5R uses a 44-pin LGA (Land Grid Array) package identified by "HH" in the part number, measuring 5 mm × 5 mm with 0.5 mm pitch and an exposed thermal pad. This compact, leadless package supports high-density meter PCB layouts while enabling efficient heat dissipation in sealed enclosures.

How many low-power modes does the MKM14Z128CHH5R support, and what is the lowest current consumption?

The MKM14Z128CHH5R supports seven low-power modes, including VLLS0, VLLS1, VLLS2, VLLS3, VLPS, STOP, and WAIT. In VLLS0 mode with POR circuit disabled, it achieves 0.35 µA typical current at 3.0 V and 25°C-retaining full register state and RAM content-making it ideal for battery-powered meter wake-on-event operation over 10+ years.