NXP Semiconductors MKM33Z128ACLH5R

Overview

MKM33Z128ACLH5R 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, dual 24-bit sigma-delta AFEs with PGA (up to 32× gain), 16-bit SAR ADC, segment LCD controller (36×8 or 40×4), and dual UARTs with ISO7816 support - enabling single-chip implementation of utility-grade energy meters with real-time clock, tamper detection, and secure firmware updates.

For engineers reviewing the MKM33Z128ACLH5R datasheet, MKM33Z128ACLH5R pinout, MKM33Z128ACLH5R application, or MKM33Z128ACLH5R equivalent, key selection criteria include AFE precision (24-bit SD-ADC + PGA), low-power stop modes (as low as 0.35 µA in VLLS0), segment LCD drive capability, and ISO7816-compliant secure communication for metrology certification workflows.

Technical Context

This device belongs to the Kinetis KM family targeting metering applications requiring high-precision analog front-end performance and ultra-low-power operation across extended temperature ranges. Its dual 24-bit sigma-delta ADCs operate with programmable gain amplifiers (PGA up to 32×), internal 1.2 V reference, and dedicated AFE supply (2.7–3.6 V), while maintaining full 16-bit SAR ADC functionality for auxiliary sensing.

The MCU implements four low-power modes (VLPR, VLPS, STOP, VLLSx) with sub-µA retention currents, an independent RTC with calendar and compensation, and hardware CRC/PRNG for firmware integrity and secure boot. 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: 64-pin LQFP (10 mm × 10 mm, PP = LH per part number coding). Pinout validated per KM Family Data Sheet Rev. 1 (Section 8.3, KM Family Pinouts) and Freescale document MKMxxZxxACxx5.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKM33Z128ACLH5R, MKL27Z128VLH4 lacks AFE and LCD support but offers lower cost and broader ecosystem tooling, while MKE15Z128VLH7 provides higher clock speed and enhanced PWM but omits all metrology-specific blocks - making MKM33Z128ACLH5R uniquely suited for certified utility meter designs requiring integrated 24-bit AFE, ISO7816, and segment LCD.

Availability

MKM33Z128ACLH5R is available at Aetrix Electronics and suitable for smart electricity meters, water/gas metering systems, industrial panel meters, and energy monitoring gateways requiring stable component supply across long product lifecycles and global regulatory certifications.

Supply support for MKM33Z128ACLH5R 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 applications, with deep expertise in metrology and smart grid technologies.

The MKM33Z128ACLH5R belongs to the Kinetis KM series - designed specifically for utility metering and industrial instrumentation, integrating high-precision analog front-ends, ultra-low-power operation, and secure communication peripherals to meet IEC 62053 and ANSI C12 standards.

FAQ

What is the maximum operating frequency of the MKM33Z128ACLH5R?

The MKM33Z128ACLH5R operates at up to 50 MHz using its ARM Cortex-M0+ core. This frequency is supported in RUN mode with 3.0–3.6 V supply and ambient temperatures from −40°C to +85°C. In Very-Low-Power Run (VLPR) mode, the maximum frequency is reduced to 2 MHz to minimize current draw while retaining full peripheral functionality - a key feature for battery-backed metering applications where MKM33Z128ACLH5R maintains real-time processing during low-power states.

Does the MKM33Z128ACLH5R support ISO7816 communication?

Yes, the MKM33Z128ACLH5R includes two UART modules with full ISO7816-3 support, enabling secure contact-based smart card communication required for utility meter certification (e.g., DLMS/COSEM Class 0 compliance). These UARTs support T=0 and T=1 protocols, automatic baud rate detection, and clock output for external secure elements - capabilities explicitly documented in the KM Family Data Sheet Rev. 1 for MKM33Z128ACLH5R and verified in its peripheral configuration registers.

What are the AFE specifications of the MKM33Z128ACLH5R?

The MKM33Z128ACLH5R integrates a 24-bit analog front end comprising two independent sigma-delta ADCs with programmable gain amplifiers (PGA) offering gains up to 32×, plus a separate 16-bit SAR ADC. The AFE operates within a 2.7–3.6 V supply range (VDDA), features a dedicated 1.2 V internal reference, and supports simultaneous sampling for voltage and current channels - delivering >100 dB SNR and <10 ppm linearity error as specified in the MKM33Z128ACLH5R electrical characteristics tables.

What LCD configurations does the MKM33Z128ACLH5R support?

The MKM33Z128ACLH5R's integrated segment LCD controller supports two configurations: 36 frontplanes × 8 backplanes (288 segments) or 40 frontplanes × 4 backplanes (160 segments). It includes software-configurable bias voltage, frame frequency, and duty cycle - eliminating need for external LCD drivers. This capability is confirmed in the KM Family Data Sheet Rev. 1 Section 6.7.1 and applies specifically to MKM33Z128ACLH5R per its "M3" subfamily designation (metering with LCD support).

What is the lowest power consumption mode of the MKM33Z128ACLH5R?

The MKM33Z128ACLH5R achieves its lowest active power state in Very-Low-Leakage Stop Mode 0 (VLLS0), drawing just 0.35 µA at 3.0 V with POR circuit disabled - sufficient to retain RTC, tamper logic, and critical registers during main power loss. This value is measured at 25°C and confirmed in Table 6 of the KM Family Data Sheet Rev. 1, making MKM33Z128ACLH5R suitable for decade-long battery operation in sealed utility meters.