NXP Semiconductors MC9S08QE64CLD

Overview

MC9S08QE64CLD from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 64 KB flash, 4 KB RAM, 48-pin QFN package, and integrated peripherals including dual SCI, dual SPI, dual I²C, six-channel TPM, 24-channel 12-bit ADC, two analog comparators, RTC, and background debug interface - designed for cost-sensitive industrial control and sensor interface applications.

For engineers reviewing the MC9S08QE64CLD datasheet, MC9S08QE64CLD pinout, MC9S08QE64CLD application, or MC9S08QE64CLD equivalent, this page delivers verified electrical specs, validated QFN-48 pin mapping, real-world use cases in motor control and energy metering, and two confirmed alternative parts with documented functional and packaging differences.

Technical Context

The MC9S08QE64CLD implements the HCS08 CPU core with up to 50.33 MHz operation above 2.4 V, FLL-based internal clock source (ICS) with ±2% deviation and 0.2% trimming resolution, and supports multiple low-power stop modes with 6 μs wake-up time. It integrates a dedicated real-time counter (RTC) running on a 1 kHz internal oscillator across run/wait/stop modes.

Its analog subsystem includes a 24-channel 12-bit ADC operating down to 1.8 V with 2.5 μs conversion time, internal temperature sensor (1.7 mV/°C), bandgap reference channel, and two ACMPs with interrupt capability and routing to TPM modules - all functional in stop3 mode.

Key Specifications

Pinout & Package

MC9S08QE64CLD is housed in a 48-pin QFN package (Case 1314, 7 mm²), exposed pad thermal design, copper-wire interconnect per Freescale QFN Addendum Rev. 0. Pin assignments follow the MC9S08QE128 series standard for 48-pin QFN configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08QE64CLD, MC9S08AC60CFUE reduces feature set to cut cost without changing footprint, while S9KEAZN64AMLH trades pin compatibility for 32-bit scalability - making the former ideal for cost-constrained drop-in upgrades and the latter suited for next-generation designs requiring higher throughput.

Availability

MC9S08QE64CLD is available at Aetrix Electronics and suitable for industrial motor control, smart metering, sensor fusion, and building automation applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.

Supply support for MC9S08QE64CLD 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 delivering secure, scalable solutions for automotive, industrial, IoT, and mobile applications, with deep heritage in microcontroller innovation.

The MC9S08QE64CLD belongs to the HCS08-based QE series, engineered for energy-efficient, mixed-signal embedded control in space-constrained industrial systems where analog integration, low-power operation, and debug accessibility are essential.

FAQ

What is the maximum operating frequency of the MC9S08QE64CLD at 3.3 V?

The MC9S08QE64CLD achieves up to 50.33 MHz CPU operation when supplied at ≥2.4 V, including 3.3 V. This frequency is sustained across the full –40°C to +85°C temperature range and requires the internal clock source (ICS) configured with FLL enabled and appropriate reference trimming. At lower voltages (e.g., 2.1 V), the maximum frequency reduces to 40 MHz.

Does the MC9S08QE64CLD support in-circuit debugging, and what interface is used?

Yes, the MC9S08QE64CLD supports single-wire background debug via the BKGD/MS pin (PTA4). It includes an on-chip in-circuit emulator (ICE) module with two comparators, nine trigger modes, and an eight-deep FIFO for flow-address capture. This allows breakpoint setting, real-time register inspection, and flash programming without requiring a JTAG header.

Can the MC9S08QE64CLD's ADC operate during low-power stop modes?

Yes, the MC9S08QE64CLD's 24-channel 12-bit ADC remains fully functional in stop3 mode. It supports automatic conversions triggered by internal timers or external events, uses the internal bandgap reference, and retains accuracy from 3.6 V down to 1.8 V - enabling continuous sensor monitoring with minimal power consumption.

What are the key differences between the MC9S08QE64CLD and MC9S08QE128?

The MC9S08QE64CLD has 64 KB flash and 4 KB RAM versus 128 KB flash and 8 KB RAM in the MC9S08QE128. It shares the same 48-pin QFN package, peripheral set (dual SCI/SPI/I²C, TPM3, RTC, ACMPs), and pinout, but omits I²C2 and reduces ADC channel count from 24 to 22 in some package variants - though datasheet Table 1 confirms 24 channels for MC9S08QE64 in 48-pin QFN.

Is the MC9S08QE64CLD RoHS compliant and qualified for automotive use?

The MC9S08QE64CLD meets RoHS Directive 2011/65/EU requirements. While not AEC-Q100 certified as a full automotive grade part, its ESD protection (±2000 V HBM), latch-up immunity (±100 mA), and operating range (–40°C to +85°C) align with industrial and under-hood auxiliary applications. Automotive qualification would require specific variant ordering with AQ suffix.