NXP Semiconductors MKM33Z128CLH5R

Overview

MKM33Z128CLH5R 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 up to 32×, 16-bit SAR ADC, 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 MKM33Z128CLH5R datasheet, MKM33Z128CLH5R pinout, MKM33Z128CLH5R application, or MKM33Z128CLH5R equivalent, key selection criteria include AFE resolution and gain support, low-power stop-mode current (as low as 0.35 µA in VLLS0), RTC battery backup capability, and dual SPI/I²C/UART interfaces with ISO7816 and IrDA options.

Technical Context

The MKM33Z128CLH5R implements a dual-channel 24-bit Sigma-Delta AFE architecture with programmable gain amplifiers (up to 32×) and integrated 6-bit DACs in its analog comparators. Its clock system includes dual crystal oscillators (1–32 MHz and 32 kHz), MCG with FBE/BLPE modes, and multi-purpose clock generator supporting dynamic frequency scaling.

Power management features include seven low-power modes (VLPR, VLPS, STOP, VLLS0–3), memory protection unit (MPU), 4-channel DMA with 64 request sources, and robust watchdog with independent iRTC. The peripheral crossbar enables flexible signal routing between on-chip modules without external logic.

Key Specifications

Pinout & Package

64-pin LQFP package (10 mm × 10 mm, PP = LH per part number decoding), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKM33Z128CLH5R, MKM33Z64CLH5 offers identical metrology capability at lower memory cost, while MKE15Z128VLH7 trades LCD and dual AFE for CAN FD and higher core efficiency-making it viable only where display and precision analog are secondary.

Availability

MKM33Z128CLH5R is available at Aetrix Electronics and suitable for smart metering, utility infrastructure monitoring, and industrial human-machine interface applications requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability.

Supply support for MKM33Z128CLH5R 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 expertise in metrology and low-power embedded systems.

The KM family-including MKM33Z128CLH5R-is designed specifically for high-accuracy, battery-backed utility metering applications, integrating precision analog front ends, LCD controllers, and ultra-low-power modes into a single die.

FAQ

What is the maximum operating frequency of the MKM33Z128CLH5R?

The MKM33Z128CLH5R 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 ambient temperature range and 1.71–3.6 V supply voltage (when AFE is inactive) or 2.7–3.6 V (when AFE is active). System and bus clocks scale accordingly, with flash clock limited to 25 MHz in normal run mode.

Does the MKM33Z128CLH5R support both LCD segment driving and analog measurement simultaneously?

Yes, the MKM33Z128CLH5R supports concurrent LCD segment driving and high-precision analog measurement. Its dedicated segment LCD controller (36×8 or 40×4) operates independently from the dual 24-bit Sigma-Delta AFEs and 16-bit SAR ADC. Pin multiplexing allows shared GPIO resources to be allocated dynamically, and the peripheral crossbar ensures timing isolation between display refresh and metrology sampling cycles.

What is the lowest power consumption mode available on the MKM33Z128CLH5R?

The MKM33Z128CLH5R achieves its lowest active-retention current in Very Low-Leakage Stop Mode 0 (VLLS0), drawing just 0.35 µA at 25°C when the POR detect circuit is disabled. With POR enabled, consumption rises to 0.472 µA. In this mode, the iRTC remains operational using VBAT, and wakeup is supported via multiple sources including GPIO, RTC alarm, and tamper detection-enabling decade-long battery life in backup applications.

Can the MKM33Z128CLH5R operate from a single 3.3 V supply without separate analog and digital rails?

Yes, the MKM33Z128CLH5R can operate from a single 3.3 V supply. While it provides separate VDD/VSS and VDDA/VSSA pins for optimal noise isolation, the datasheet permits VDDA = VDD if analog performance requirements allow. The specification requires |VDD − VDDA| ≤ 0.1 V and |VSS − VSSA| ≤ 0.1 V-easily met with proper PCB layout and shared 3.3 V plane with localized analog decoupling.

Is the MKM33Z128CLH5R pin-compatible with other members of the KM family?

No, the MKM33Z128CLH5R is not universally pin-compatible across the KM family. While all LH-package variants (e.g., MKM33Z64CLH5, MKM34Z128CLL5) share the same 64-pin LQFP mechanical outline, pin functions differ significantly between subfamilies (M1/M3/M4) and flash sizes due to distinct peripheral sets and signal multiplexing. For example, LCD segment assignments and AFE channel mappings vary-requiring schematic and layout review before substitution.