NXP Semiconductors MKM33Z64ACLL5

Overview

MKM33Z64ACLL5 from NXP Semiconductors (formerly Freescale) is a 50 MHz ARM Cortex-M0+ microcontroller optimized for smart metering and LCD-based industrial HMI applications. It integrates 64 KB flash, 16 KB RAM, a 24-bit analog front end (AFE) with programmable gain amplifier, 16-bit SAR ADC, dual 32 kHz and 1–32 MHz crystal oscillators, and a segment LCD controller supporting up to 36×8 or 40×4 configurations.

For engineers reviewing the MKM33Z64ACLL5 datasheet, MKM33Z64ACLL5 pinout, MKM33Z64ACLL5 application, or MKM33Z64ACLL5 equivalent, key selection considerations include its -40°C to +85°C operating range, dual-voltage operation (1.71–3.6 V without AFE / 2.7–3.6 V with AFE), low-leakage stop modes down to 0.35 µA, and integrated tamper detection and RTC with battery backup support.

Technical Context

The MKM33Z64ACLL5 implements a multi-clock architecture with MCG (Multipurpose Clock Generator), supporting FBE (Froze Bus Enable) and BLPE (Bypass Low-Power External) modes for dynamic power scaling. Its AFE subsystem includes two 24-bit sigma-delta ADCs with PGA (gain up to 32), one additional 24-bit sigma-delta ADC, and two analog comparators with embedded 6-bit DACs and programmable reference inputs.

System-level integration includes a 4-channel DMA controller servicing up to 64 request sources, memory protection unit (MPU) with multi-master protection, Peripheral Crossbar for flexible signal routing, and hardware CRC and true random number generator for security-critical metering firmware. The device supports five low-power modes - RUN, WAIT, VLPR, STOP, and four VLLS variants - with sub-µA retention in VLLS0 (POR disabled).

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 mm, PP = LL per part numbering). Pinout validated per KM Family Data Sheet Rev. 1 (09/2014), Section 8.3 "KM Family Pinouts" - full signal multiplexing defined for all 100 pins including dedicated AFE inputs, LCD segment/backplane outputs, and dual crystal oscillator connections.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKM33Z128ACLL5, the MKM33Z64ACLL5 trades flash capacity for lower unit cost and identical metrology performance; compared with MKE15Z64VLL5, it delivers higher system integration and reduced BOM count at the expense of flexibility in display and analog architecture.

Availability

MKM33Z64ACLL5 is available at Aetrix Electronics and suitable for smart metering, industrial HMI, and battery-powered utility monitoring applications requiring stable component supply, long lifecycle support, and consistent metrology-grade specifications.

Supply support for MKM33Z64ACLL5 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 specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with deep heritage in microcontrollers from its Freescale acquisition.

The MKM33Z64ACLL5 belongs to NXP's Kinetis KM series - a family purpose-built for smart metering and LCD-based industrial instrumentation, emphasizing analog precision, ultra-low-power operation, and regulatory compliance (IEC 62053, EN 13757).

FAQ

What is the maximum operating frequency of the MKM33Z64ACLL5?

The MKM33Z64ACLL5 features an ARM Cortex-M0+ core rated for up to 50 MHz operation. This frequency is supported across its full operating voltage range (2.7–3.6 V with AFE enabled; 1.71–3.6 V otherwise) and temperature range (-40°C to +85°C). The device uses the MCG clock generator to derive system, bus, and flash clocks, with fSYS = 50 MHz, fBUS = 25 MHz, and fFLASH = 25 MHz in normal run mode per the KM Family Data Sheet Rev. 1.

Does the MKM33Z64ACLL5 include an integrated LCD controller?

Yes, the MKM33Z64ACLL5 includes a dedicated segment LCD controller capable of driving up to 36 frontplanes and 8 backplanes, or 40 frontplanes and 4 backplanes. This controller operates independently of the CPU and supports software-configurable bias, duty, and frame frequency - eliminating the need for external LCD driver ICs in utility meter and panel meter designs.

What are the lowest power consumption modes supported by the MKM33Z64ACLL5?

The MKM33Z64ACLL5 supports Very Low-Leakage Stop (VLLS) modes, with VLLS0 achieving 0.35 µA typical current at 25°C when POR detection is disabled. With POR enabled, VLLS0 draws 0.472 µA. VLLS1–VLLS3 offer progressively higher functionality (e.g., LPO running, RTC active) at currents from 0.89 µA to 1.98 µA. These modes retain RAM and register state while enabling wake on tamper, RTC alarm, or external interrupt.

Can the MKM33Z64ACLL5 operate without the Analog Front End (AFE) enabled?

Yes, the MKM33Z64ACLL5 supports dual voltage operation: 1.71–3.6 V when the AFE is not used, and 2.7–3.6 V when the AFE is active. This allows designers to use lower supply voltages for digital-only operation (e.g., HMI control without metrology), reducing power consumption and simplifying power supply design, while retaining full peripheral functionality except AFE-related modules.

What communication interfaces are available on the MKM33Z64ACLL5?

The MKM33Z64ACLL5 provides two SPI modules (one with FIFO and 5V-tolerant AMR support, one without FIFO), two I²C modules with SMBus support, and four UART/SCI modules - two with ISO 7816 smart card support and two without. One SCI supports IrDA, and 5V AMR is supported on a single SCI channel, enabling direct connection to legacy metering communication modules like PLC or RF transceivers.