NXP Semiconductors MKM33Z128ACLL5

Overview

MKM33Z128ACLL5 from NXP Semiconductors (formerly Freescale) is a 50 MHz ARM Cortex-M0+ microcontroller optimized for smart metering and LCD-based industrial instrumentation. It integrates 128 KB flash, 16 KB RAM, a 24-bit analog front end with PGA, dual 16/24-bit ADCs, segment LCD controller (36×8 or 40×4), and operates from 1.71–3.6 V across –40°C to +85°C.

For engineers reviewing the MKM33Z128ACLL5 datasheet, MKM33Z128ACLL5 pinout, MKM33Z128ACLL5 application, or MKM33Z128ACLL5 equivalent, this page delivers verified electrical specs, low-power mode behavior, AFE configuration constraints, and metering-specific peripheral interoperability - critical for utility-grade accuracy and battery-backed RTC operation.

Technical Context

The MKM33Z128ACLL5 implements a dual-domain clock architecture: high-speed MCG supports 50 MHz system operation in RUN mode, while BLPE mode enables 2 MHz VLPR operation for ultra-low-power AFE sampling. Its analog subsystem includes two independent 24-bit sigma-delta ADCs with programmable gain amplifiers (up to 32×), a dedicated 16-bit SAR ADC, and hardware-averaging logic - all synchronized via shared AFE modulator clock (max 6.5 MHz).

System-level power management leverages six discrete low-power modes (VLPR/VLPW/STOP/VLLS0–VLLS3), with VLLS0 consuming as low as 0.35 μA at 25°C when POR detection is disabled. The Peripheral Crossbar enables flexible signal routing between timers, ADCs, and communication interfaces without software overhead.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 mm, PP = LL per part number decoding). Pinout validated per KM Family Data Sheet Rev. 1 (2014), Section 8.3 "KM Family Pinouts" - includes dedicated AFE analog inputs (ADxP/ADxN), LCD segment/backplane drivers (LCDPx/LCDBy), and dual crystal oscillator connections (EXTAL/XTAL, RTC_EXTAL/RTC_XTAL).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKM33Z128ACLL5, MKM33Z64ACLL5 reduces flash capacity but maintains identical low-power behavior and AFE performance, while MKE15Z128VLL7 shifts system complexity to external components - making MKM33Z128ACLL5 the optimal choice for integrated, certified metering designs.

Availability

MKM33Z128ACLL5 is available at Aetrix Electronics and suitable for smart electricity metering, battery-powered utility meters, and industrial panel meters requiring stable component supply, long-term lifecycle support, and metrology-grade analog integration.

Supply support for MKM33Z128ACLL5 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 roots in Freescale's embedded processing heritage.

The KM family - including MKM33Z128ACLL5 - was designed specifically for utility metering and industrial human-machine interface applications, integrating high-resolution analog front ends, LCD controllers, and ultra-low-power stop modes into a single Cortex-M0+ SoC.

FAQ

What is the maximum operating frequency of the MKM33Z128ACLL5 core?

The MKM33Z128ACLL5 features an ARM Cortex-M0+ core rated for up to 50 MHz operation. This frequency is achievable when powered within the 2.7–3.6 V range and using the main crystal oscillator (1–32 MHz) with the MCG in FBE mode. At 50 MHz, the core delivers 0.95 Dhrystone MIPS per MHz, enabling real-time execution of metrology algorithms and LCD refresh without latency.

Does the MKM33Z128ACLL5 support both 16-bit and 24-bit analog-to-digital conversion?

Yes, the MKM33Z128ACLL5 integrates two distinct ADC subsystems: a 16-bit successive approximation register (SAR) ADC and a 24-bit sigma-delta AFE with two independent channels. The SAR ADC provides fast sampling for auxiliary signals, while the 24-bit AFE - with programmable gain amplifier (PGA) and hardware averaging - delivers high-resolution metrology-grade measurements for current and voltage sensing in smart meters.

What LCD configurations does the MKM33Z128ACLL5 support?

The MKM33Z128ACLL5's integrated segment LCD controller supports two configurations: 36 frontplane lines × 8 backplane lines (288 segments) or 40 frontplane lines × 4 backplane lines (160 segments). This flexibility allows direct driving of common utility meter displays without external glass drivers, and the controller includes built-in bias generation and contrast control registers for reliable operation across temperature.

Can the MKM33Z128ACLL5 operate from a single 3.3 V supply when using the Analog Front End?

Yes, the MKM33Z128ACLL5 can operate from a single 3.3 V supply when the Analog Front End (AFE) is active, as its AFE operating voltage range is specified as 2.7–3.6 V. However, VDDA (analog supply) must be maintained within ±0.1 V of VDD, and VDD–VDDA differential must not exceed this limit to ensure AFE linearity and 24-bit effective resolution.

What is the lowest power consumption mode available on the MKM33Z128ACLL5?

The MKM33Z128ACLL5 achieves its lowest active power state in Very Low-Leakage Stop Mode 0 (VLLS0), consuming just 0.35 μA at 25°C when the POR detect circuit is disabled. In this mode, the RTC remains operational using VBAT, the 128-bit UID is retained, and wakeup can occur via tamper input or low-leakage interrupt - enabling decade-long battery life in sealed utility meters.