NXP Semiconductors MKM33Z128CLH5

Overview

MKM33Z128CLH5 from NXP Semiconductors (formerly Freescale) is a 50 MHz ARM Cortex-M0+ microcontroller optimized for smart metering and LCD-based industrial sensing applications. It integrates 128 KB flash, 16 KB RAM, dual 24-bit sigma-delta AFEs with PGA (gain up to 32), 16-bit SAR ADC, segment LCD controller (36×8 or 40×4), and operates from 1.71–3.6 V (AFE inactive) or 2.7–3.6 V (AFE active) across –40°C to +85°C.

For engineers reviewing the MKM33Z128CLH5 datasheet, MKM33Z128CLH5 pinout, MKM33Z128CLH5 application, or MKM33Z128CLH5 equivalent, key selection criteria include low-power stop modes (as low as 0.35 µA in VLLS0), integrated analog front-end precision for metrology-grade current/voltage measurement, and hardware CRC/true RNG for secure firmware updates in utility infrastructure.

Technical Context

The MKM33Z128CLH5 implements a dual-domain clock architecture: MCG supports FBE (1–32 MHz crystal), BLPE (low-power internal), and FEI modes, enabling dynamic switching between 50 MHz run mode and sub-µA stop states. Its AFE subsystem includes two independent 24-bit sigma-delta ADCs with programmable gain amplifiers, 6-bit DACs in comparators, and 1.2 V reference - all calibrated for <±0.1% gain error over temperature.

System-level integration includes a Peripheral Crossbar for flexible signal routing, 4-channel DMA supporting 64 request sources, memory protection unit with multi-master arbitration, and robust watchdog with independent RTC backup domain. The device uses a dedicated iRTC battery supply (1.71–3.6 V) to maintain calendar time and tamper detection during main power loss.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKM33Z128CLH5, MKM33Z64CLH5 reduces flash capacity without altering analog precision or low-power behavior, while MKE15Z128VLH7 trades integrated metrology peripherals for raw performance and modern toolchain support - requiring external components to replicate MKM33Z128CLH5's single-chip metering capability.

Availability

MKM33Z128CLH5 is available at Aetrix Electronics and suitable for smart metering, industrial flow measurement, and energy monitoring gateways requiring stable component supply, long-term lifecycle assurance, and qualified production traceability.

Supply support for MKM33Z128CLH5 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 MKM33Z128CLH5 - was designed specifically for utility metering and industrial sensing, integrating metrology-grade analog front-ends, ultra-low-power operation, and LCD control to replace multi-chip meter designs with a single SoC.

FAQ

What is the maximum operating frequency of the MKM33Z128CLH5 core?

The MKM33Z128CLH5 features an ARM Cortex-M0+ core rated for up to 50 MHz operation. This frequency is supported across the full –40°C to +85°C temperature range and 1.71–3.6 V supply voltage (when AFE is inactive) or 2.7–3.6 V (when AFE is active). The device achieves 0.95 Dhrystone MIPS per MHz, delivering deterministic real-time performance for metrology calculations in the MKM33Z128CLH5.

Does the MKM33Z128CLH5 support both crystal and internal oscillators?

Yes, the MKM33Z128CLH5 supports multiple clock sources: a 1–32 MHz primary crystal oscillator (EXTAL/XTAL), a 32 kHz RTC crystal oscillator (RTC_CLKIN), and an internal low-power oscillator (LPO) factory-trimmed to 1000 µs period. The Multi-purpose Clock Generator (MCG) allows dynamic switching between FBE (crystal), BLPE (internal), and FEI modes - enabling the MKM33Z128CLH5 to balance accuracy and ultra-low-power operation.

What analog peripherals are integrated into the MKM33Z128CLH5?

The MKM33Z128CLH5 integrates a comprehensive analog subsystem: dual 24-bit sigma-delta ADCs with programmable gain amplifiers (PGA, gain up to 32), one 16-bit SAR ADC, two analog comparators each with a 6-bit DAC and programmable reference input, and a 1.2 V internal voltage reference. These are explicitly specified for the MKM33Z128CLH5 in the KM Family Data Sheet Rev. 7 and enable simultaneous high-precision current and voltage measurement in smart meter applications.

What is the lowest power consumption mode available on the MKM33Z128CLH5?

The MKM33Z128CLH5 supports Very Low-Leakage Stop Mode 0 (VLLS0) with typical current consumption of 0.35 µA at 25°C when the POR detect circuit is disabled. With POR enabled, VLLS0 draws 0.472 µA. This mode retains RAM content and RTC functionality while powering down the CPU, flash, and most peripherals - making it ideal for battery-backed applications where the MKM33Z128CLH5 must operate for over a decade on a single coin cell.

Is the MKM33Z128CLH5 pin-compatible with other devices in the KM Family?

The MKM33Z128CLH5 uses a 64-pin LQFP package (PP = LH) and shares identical pinout with MKM33Z64CLH5 and MKM32Z64CLH5 per the KM Family Pinouts section (Section 8.2) of the datasheet. However, it is not pin-compatible with LL (100-LQFP) or HH (44-LGA) variants. Firmware and hardware designs targeting the MKM33Z128CLH5 can be reused for MKM33Z64CLH5 without PCB changes, though flash-dependent features require validation.