NXP Semiconductors MKM35Z512VLQ7R

Overview

MKM35Z512VLQ7R from NXP Semiconductors is a 32-bit Arm® Cortex®-M0+ microcontroller optimized for high-accuracy electricity metering, featuring 512 KB flash, 64 KB SRAM, four 24-bit ΣΔ ADCs with PGA, hardware tamper detection with timestamping, and an integrated segment LCD controller. It operates across –40 to 105 °C and supports single-chip 1-/2-/3-phase metering with WELMEC/OIML compliance.

For engineers reviewing the MKM35Z512VLQ7R datasheet, MKM35Z512VLQ7R pinout, MKM35Z512VLQ7R application, or MKM35Z512VLQ7R equivalent, this device delivers metrology-grade analog front-end performance, secure cryptographic acceleration (AES via MMCAU), low-power RTC with VBAT backup, and full support for neutral disconnect use cases in revenue-grade smart meters.

Technical Context

The MKM35Z512VLQ7R integrates a dedicated Metering Memory Mapped Arithmetic Unit (MMAU) for real-time energy calculation and harmonic analysis, alongside four independent AFE channels each with programmable gain amplifier and 24-bit ΣΔ conversion. Its iRTC includes hardware tamper detection with time stamping and battery-backed memory retention.

It implements a multi-layer security architecture: Memory Protection Unit (MPU), CRC engine, RNGA compliant with NIST SP800-90, and MMCAU for AES-128/256 encryption. Clocking combines FLL, PLL, and multiple crystal/RC sources-including a 32.768 kHz oscillator in the VBAT domain-to maintain timing integrity during power loss.

Key Specifications

Pinout & Package

MKM35Z512VLQ7R is housed in a 144-pin LQFP package (20 mm × 20 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments follow NXP's KM35 signal multiplexing scheme, supporting up to 99 GPIOs, four AFE input channels, LCD segment/common drivers, and dual crystal oscillator inputs (32.768 kHz and 1–32 MHz).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKM35Z512VLQ7R, MKM35Z512VLL7R trades pin count and LCD capability for smaller footprint, while MC56F84789 shifts system integration burden to external components - making MKM35Z512VLQ7R the only single-chip solution with certified tamper detection and metrology-grade AFE in this performance class.

Availability

MKM35Z512VLQ7R is available at Aetrix Electronics and suitable for smart electricity metering, revenue-grade energy monitoring, and tamper-secure utility gateways requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MKM35Z512VLQ7R 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The KM35 sub-family was designed specifically for high-accuracy, standards-compliant electricity metering - integrating metrology, security, and human-machine interface functions into a single Arm® Cortex®-M0+ MCU platform.

FAQ

What is the maximum operating frequency of the MKM35Z512VLQ7R core?

The MKM35Z512VLQ7R features an Arm® Cortex®-M0+ core rated for up to 75 MHz operation. This frequency is supported across the full temperature range (–40 to 105 °C) and voltage range (2.7–3.6 V) when the AFE is active. The core also supports Very Low Power Run (VLPR) mode at up to 4 MHz for ultra-low-power background tasks.

Does the MKM35Z512VLQ7R include hardware-based security features?

Yes, the MKM35Z512VLQ7R integrates multiple hardware security modules: Memory Protection Unit (MPU), Memory Mapped Cryptographic Acceleration Unit (MMCAU) for AES-128/256, Random Number Generator (RNGA) compliant with NIST SP800-90, and Programmable Cyclic Redundancy Check (PCRC). These enable secure boot, encrypted communication, and tamper-resilient firmware updates.

How many analog-to-digital converter channels does the MKM35Z512VLQ7R support?

The MKM35Z512VLQ7R supports two distinct ADC subsystems: four independent 24-bit sigma-delta (ΣΔ) ADCs with programmable gain amplifiers (PGA) for metrology-grade current/voltage sampling, and one 16-channel 16-bit successive approximation register (SAR) ADC for auxiliary measurements such as temperature or DC bus sensing.

What package type and pin count does the MKM35Z512VLQ7R use?

The MKM35Z512VLQ7R is supplied in a 144-pin LQFP package (20 mm × 20 mm body, 0.5 mm pitch) with exposed thermal pad. It provides up to 99 general-purpose I/O pins, including dedicated AFE, LCD, and crystal oscillator interfaces - matching the pinout of the KM35P144M75SF0 reference design.

Is the MKM35Z512VLQ7R compliant with international metrology standards?

Yes, the MKM35Z512VLQ7R is engineered to support compliance with WELMEC/OIML recommendations and IEC 62053-21/22 accuracy classes. Its hardware tamper detection with timestamping, auto-compensated iRTC, and high-stability internal voltage reference (10–15 ppm/°C) directly address key requirements for Class 0.2 and Class 0.5 revenue-grade meters.