NXP Semiconductors MC9S08QE16CWL

Overview

MC9S08QE16CWL from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 16 KB flash, 1 KB RAM, and integrated 12-bit ADC, dual analog comparators, and three timer/PWM modules. It operates at up to 50.33 MHz across 1.8–3.6 V and –40 °C to +85 °C, supporting low-power stop modes and single-wire background debug. It targets embedded control in industrial sensors and automotive body electronics.

For engineers reviewing the MC9S08QE16CWL datasheet, MC9S08QE16CWL pinout, MC9S08QE16CWL application, or MC9S08QE16CWL equivalent, key selection factors include its 32-pin QFN package, 12-bit ADC with temperature sensor, dual ACMPs with interrupt capability, RTC with low-power oscillator, and support for LIN-compliant SCI interfaces in resource-constrained systems.

Technical Context

The MC9S08QE16CWL implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources and a frequency-locked-loop (FLL)-based internal clock source (ICS) delivering 4 kHz–50.33 MHz with ±2% deviation over voltage and temperature. Its ICS includes factory-trimmed internal reference (0.2% resolution).

It integrates on-chip peripherals including two serial communications interfaces (SCI1/SCI2) with LIN master/slave extended break support, one SPI module with double-buffered TX/RX, one I²C interface (100 kbps), and a real-time counter (RTC) running on a dedicated 1 kHz low-power oscillator - all functional in Stop3 mode. The ADC supports 10 channels, 2.5 µs conversion, and internal bandgap reference.

Key Specifications

Pinout & Package

MC9S08QE16CWL is housed in a 32-pin QFN package (Case 1582, 5 mm × 5 mm) with exposed thermal pad. Pin assignments follow the MC9S08QE32 series layout, with shared functionality across variants; the 32-pin variant omits PTE[0–7], PTD[2–7], and several analog/digital pins present in larger packages.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9KEAZ128AMLH and MC9S08AC16CFGE, the MC9S08QE16CWL uniquely balances HCS08 software continuity, LIN-ready dual-SCI, integrated RTC, and dual ACMPs in a compact 32-pin QFN - making it optimal for incremental upgrades of existing QE-series designs requiring minimal layout change.

Availability

MC9S08QE16CWL is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, and smart HVAC actuators requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08QE16CWL 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications.

The MC9S08QE16CWL belongs to the HCS08-based QE series, designed specifically for cost-sensitive, low-power embedded control in automotive body electronics and industrial automation where reliability, small footprint, and LIN/SCI interoperability are critical.

FAQ

What is the maximum operating frequency of the MC9S08QE16CWL and under what conditions?

The MC9S08QE16CWL achieves up to 50.33 MHz CPU frequency at 3.6 V and 25 °C, 40 MHz at 2.4–2.1 V, and 20 MHz at 2.1–1.8 V across –40 °C to +85 °C. This scaling is managed automatically by the internal clock source (ICS) based on supply voltage and temperature, ensuring deterministic timing without external clock adjustments. The MC9S08QE16CWL maintains full functionality across this range.

Does the MC9S08QE16CWL support LIN communication, and how is it implemented?

Yes, the MC9S08QE16CWL supports LIN communication via its two SCI modules (SCI1 and SCI2), both featuring hardware-level LIN master extended break generation and LIN slave extended break detection. The SCI modules operate in NRZ format and include wake-on-active-edge capability, enabling robust low-speed network communication without external LIN transceivers. The MC9S08QE16CWL meets LIN 2.1 physical layer timing requirements directly.

What are the power-saving modes supported by the MC9S08QE16CWL, and what is the typical wakeup time from the deepest mode?

The MC9S08QE16CWL supports two very low-power stop modes (Stop2, Stop3), a reduced-power wait mode, and peripheral clock gating. In Stop3 mode - the deepest - the MCU retains RAM and register contents while disabling the main oscillator and most clocks. The MC9S08QE16CWL achieves a typical wakeup time of 6 µs from Stop3 using the internal 1 kHz low-power oscillator, enabling rapid response to external events like keypress or sensor interrupt.

Can the MC9S08QE16CWL's ADC operate during low-power modes, and what reference options are available?

Yes, the MC9S08QE16CWL's 12-bit ADC remains fully operational in Stop3 mode, allowing continuous sensor monitoring without waking the CPU. It supports multiple reference options: external VREFH/VREFL pins, internal bandgap reference (1.17 V nominal), and the supply rail (VDD). The internal temperature sensor (1.7 mV/°C) is accessible as ADC channel ADP9, enabling self-calibration and ambient monitoring without external components. All references are valid for the MC9S08QE16CWL.

How does the MC9S08QE16CWL handle system security and memory protection?

The MC9S08QE16CWL includes hardware-based security circuitry that prevents unauthorized access to flash and RAM contents via background debug or external read attempts. Flash block protection allows selective locking of memory regions, while RAM security gates access unless enabled by a specific debug sequence. Additionally, illegal opcode and illegal address detection trigger immediate reset - a feature confirmed in the MC9S08QE32 series datasheet applicable to the MC9S08QE16CWL. These mechanisms meet basic functional safety requirements for industrial control.