NXP Semiconductors MC9S08QE32CLC

Overview

MC9S08QE32CLC from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 32 KB flash, 2 KB RAM, and integrated peripherals including 12-bit ADC, dual analog comparators, two SCI modules, I²C, SPI, three TPM timer/PWM modules, RTC, and single-wire background debug interface. It operates from 1.8 V to 3.6 V across –40 °C to +85 °C and targets low-power embedded control in industrial sensors and motor drives.

For engineers reviewing the MC9S08QE32CLC datasheet, MC9S08QE32CLC pinout, MC9S08QE32CLC application, or MC9S08QE32CLC equivalent, key selection criteria include its 32-pin QFN package (5 mm × 5 mm), 50.33 MHz max CPU frequency at 3.6 V, stop3 mode wakeup time of 6 µs, on-chip voltage regulator, and support for LIN-compliant SCI wake-up and extended break generation.

Technical Context

The MC9S08QE32CLC implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources and a 3-stage pipeline. Its internal clock source (ICS) uses a frequency-locked loop (FLL) with factory-trimmed internal reference (0.2% resolution, ±2% deviation over voltage/temperature) to generate CPU clocks from 4 kHz to 50.33 MHz.

System-level timing relies on multiple clock options: external crystal/ceramic resonator (31.25 kHz–38.4 kHz or 1–16 MHz) via XOSCVLP, or the low-power 1 kHz internal oscillator for RTC and cyclic wake-up in all modes. Peripheral clock gating via PTAPE register enables selective module power-down in stop3 mode without disabling the entire bus clock.

Key Specifications

Pinout & Package

MC9S08QE32CLC is packaged in a 32-pin QFN (Case 1582, 5 mm × 5 mm) with exposed thermal pad. This RoHS-compliant leadless package supports high-density PCB layouts and efficient thermal dissipation via soldered thermal pad connection to ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with S9KEAZN32ACLH and MC9S08AC32CFUE, the MC9S08QE32CLC offers optimal balance of compact 32-pin QFN packaging, ultra-low-power stop3 mode, and mature HCS08 toolchain support - making it ideal for cost-sensitive, space-constrained, battery-operated control nodes where ARM migration is unnecessary.

Availability

MC9S08QE32CLC is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, small motor drive controllers, and smart HVAC actuators requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08QE32CLC 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 MC9S08QE32CLC belongs to the HCS08-based QE series, designed specifically for ultra-low-power, cost-optimized embedded control in resource-constrained applications where small code size, minimal external components, and robust analog integration are critical.

FAQ

What is the maximum operating frequency of the MC9S08QE32CLC and under what voltage conditions?

The MC9S08QE32CLC achieves a maximum CPU frequency of 50.33 MHz when supplied at 3.6 V across the –40 °C to +85 °C temperature range. At lower voltages, the maximum frequency scales: 40 MHz at 2.4–2.1 V, and 20 MHz at 2.1–1.8 V. These ratings are guaranteed per the device's DC and AC characteristics tables and reflect the HCS08 core's voltage-dependent timing margins.

Does the MC9S08QE32CLC support LIN bus communication natively?

Yes, the MC9S08QE32CLC supports LIN bus communication through its two SCI modules. SCI1 and SCI2 both implement LIN master extended break generation and LIN slave extended break detection per LIN 2.x specifications. No external transceiver is required for basic LIN node functionality, though physical layer compliance depends on external driver circuitry.

What debug interface does the MC9S08QE32CLC use, and what capabilities does it provide?

The MC9S08QE32CLC uses a single-wire background debug (BKGD) interface accessible via PTA4. It supports in-circuit debugging with one hardware breakpoint, on-chip ICE with three comparators and nine trigger modes, and an eight-deep FIFO for change-of-flow address logging. The interface requires only one signal line and ground, minimizing PCB routing overhead.

Can the MC9S08QE32CLC operate from a single 1.8 V supply, and what features remain functional at that voltage?

Yes, the MC9S08QE32CLC is fully specified to operate from 1.8 V to 3.6 V. At 1.8 V, it supports 20 MHz CPU operation, full ADC functionality (12-bit, 2.5 µs conversion), analog comparators, RTC with low-power oscillator, stop3 mode, and all I/O with configurable drive strength. RAM retention is guaranteed down to 0.6 V, ensuring data persistence during brownout.

What package type and dimensions does the MC9S08QE32CLC use, and is thermal pad connection required?

The MC9S08QE32CLC uses a 32-pin QFN package (Case 1582) measuring 5 mm × 5 mm with 0.5 mm pitch. It includes an exposed thermal pad centered on the bottom surface. For reliable thermal performance and mechanical stability, the thermal pad must be soldered to a PCB copper area connected to VSS - per Freescale's EB806 application note on QFN exposed pad recommendations.