NXP Semiconductors MCF51QE32CLH

Overview

MCF51QE32CLH from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller with 32 KB flash, 8 KB RAM, and integrated peripherals including dual SCI, dual SPI, dual I²C, six-channel TPM, 24-channel 12-bit ADC, two analog comparators, RTC, and rapid GPIO - designed for low-power industrial control and sensor interface applications operating from 1.8 V to 3.6 V.

For engineers reviewing the MCF51QE32CLH datasheet, MCF51QE32CLH pinout, MCF51QE32CLH application, or MCF51QE32CLH equivalent, key selection criteria include its 64-pin LQFP package, stop3 mode current of 0.8–1.3 μA, 20 MHz max CPU frequency at 1.8 V, 12-bit ADC with 2.5 μs conversion time, and support for LIN-compliant SCI wake-up in low-power modes.

Technical Context

The MCF51QE32CLH implements ColdFire Instruction Set Architecture Revision C (ISA_C) with 0.76 DMIPS/MHz performance from flash and supports up to 30 peripheral interrupts. Its internal clock source (ICS) uses an FLL with factory-trimmed internal reference (±0.2% resolution), enabling CPU frequencies from 2 MHz to 20 MHz across the full 0–70°C operating range.

Power management includes three low-power modes: wait, stop2 (0.6–0.8 μA), and stop3 (0.8–1.3 μA), with optional external oscillator and LPO-based RTC operation during stop3. Peripheral clock gating via the PCE register allows selective module disablement to reduce active current.

Key Specifications

Pinout & Package

64-pin LQFP (Case 840F), 10 mm² body, 0.5 mm pitch, exposed pad not present. Pinout validated per Freescale MCF51QE128 Series Data Sheet Rev. 7, Figures 3 and Table 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Kinetis KL25Z128VLK and MCF51JM128CLK, the MCF51QE32CLH offers lowest system BOM cost for LIN-based control due to native hardware LIN support and minimal external components, while providing sufficient memory for firmware and calibration data in cost-sensitive 0–70°C applications.

Availability

MCF51QE32CLH is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, and automotive body control modules requiring stable component supply, long-term lifecycle support, and verified qualification for extended temperature operation.

Supply support for MCF51QE32CLH 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 formed from the spin-off of Philips' semiconductor division, now specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The MCF51QE32CLH belongs to the ColdFire Qorivva family, designed specifically for cost-optimized, low-power embedded control in applications demanding deterministic real-time response, integrated analog sensing, and robust LIN/UART communication.

FAQ

What is the maximum CPU frequency supported by the MCF51QE32CLH at 1.8 V?

The MCF51QE32CLH supports a maximum CPU frequency of 20 MHz when operating above 1.8 V across its specified 0–70°C ambient temperature range. This is confirmed in the MCF51QE128 Series Data Sheet Rev. 7, Section 1, which states "20-MHz CPU above 1.8V, across temperature range" for the MCF51QE32 variant. The MCF51QE32CLH achieves 0.76 DMIPS/MHz performance from flash memory at this frequency.

Does the MCF51QE32CLH support LIN communication natively?

Yes, the MCF51QE32CLH supports LIN communication natively through its two SCI modules. Each SCI provides LIN master extended break generation and LIN slave extended break detection, as documented in the MCF51QE128 Series Data Sheet Rev. 7, Section 1. This hardware-level support eliminates the need for external LIN transceivers in basic implementations and reduces software overhead compared to bit-banged or stack-based solutions.

What is the stop3 mode current consumption of the MCF51QE32CLH?

The MCF51QE32CLH stop3 mode current consumption is specified as 0.8 μA typical and 1.3 μA maximum at 3.0 V and –40 to 85°C, per Table 9 in the MCF51QE128 Series Data Sheet Rev. 7. This includes operation with the low-power oscillator (LPO) and RTC enabled, making it suitable for ultra-low-power applications such as battery-backed sensor nodes requiring periodic wake-up events.

How many ADC channels does the MCF51QE32CLH have, and what is their resolution?

The MCF51QE32CLH features a 24-channel, 12-bit successive approximation register (SAR) ADC with 2.5 μs conversion time, as stated in the MCF51QE128 Series Data Sheet Rev. 7, Section 1. It includes an internal bandgap reference channel and a 1.7 mV/°C temperature sensor, and remains fully functional in stop3 mode - enabling accurate analog sensing during ultra-low-power operation.

What package type and pin count does the MCF51QE32CLH use?

The MCF51QE32CLH uses a 64-pin LQFP package (Case 840F, 10 mm² footprint) with 0.5 mm pitch, as confirmed in the MCF51QE128 Series Data Sheet Rev. 7, Table 1 and Figure 3. This package is distinct from the 80-pin LQFP used by higher-density variants like the MCF51QE128, and is rated for 0–70°C ambient operation - matching the device's specified temperature range.