NXP Semiconductors MC9S08QG8MFQE

Overview

MC9S08QG8MFQE from Freescale Semiconductor is an 8-bit HCS08 microcontroller featuring a 20-MHz CPU, 8 KB Flash memory, 512 bytes RAM, and integrated peripherals including 10-bit ADC, SCI, SPI, I²C, TPM, and ACMP. It operates in industrial temperature range (–40°C to +105°C) and targets low-cost embedded control in space-constrained applications such as motor drive interfaces and sensor signal conditioning.

For engineers reviewing the MC9S08QG8MFQE datasheet, MC9S08QG8MFQE pinout, MC9S08QG8MFQE application, or MC9S08QG8MFQE equivalent, key selection criteria include QFN-16 package compatibility, single-wire background debug support, internal clock source with FLL and precision trimming, 12 GPIOs with configurable pullups/slew rate, and FLASH block protection for firmware integrity.

Technical Context

The MC9S08QG8MFQE implements the HCS08 CPU core with HC08 instruction set extension (including BGND), supporting up to 32 interrupt/reset sources and featuring an on-chip debug module with two comparators, nine trigger modes, and eight-deep FIFO for trace. Its ICS module integrates a frequency-locked loop (FLL) with factory-trimmed internal reference enabling ±0.2% resolution and ±2% deviation over voltage and temperature.

Peripherals are tightly coupled to the bus architecture: the 10-bit ADC supports hardware triggering via RTI and includes automatic compare, internal bandgap reference, and temperature sensor channel; the TPM provides two channels supporting input capture, output compare, and edge/center-aligned PWM; the ACMP output can be routed to TPM for analog event-driven timing control.

Key Specifications

Pinout & Package

MC9S08QG8MFQE is housed in a 16-pin QFN package (98ASA00671D) with 3 mm × 3 mm footprint, 0.5 mm lead pitch, and exposed thermal pad for enhanced thermal performance in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08QG8MFQE, MC9S08QG8CDTE trades thermal performance and board area for assembly flexibility, while S9S08QG8E2MTJR offers identical functionality with updated supply chain stewardship-making the latter ideal for production continuity without design change.

Availability

MC9S08QG8MFQE is available at Aetrix Electronics and suitable for motor control interfaces, sensor signal conditioning, smart power outlets, and consumer appliance control requiring stable component supply and industrial temperature grade operation.

Supply support for MC9S08QG8MFQE 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

Freescale Semiconductor was a leading designer of embedded processors and analog devices, acquired by NXP Semiconductors in 2015; its HCS08 portfolio remains widely deployed in cost-sensitive industrial and automotive subsystems.

The MC9S08QG8MFQE belongs to the HCS08 QG family-designed for ultra-low-cost, small-footprint 8-bit control in space- and power-constrained applications where debug capability, peripheral integration, and Flash reliability are essential.

FAQ

What is the operating voltage range for the MC9S08QG8MFQE?

The MC9S08QG8MFQE operates across a supply voltage range of 2.7 V to 5.5 V, supporting both 3.3 V and 5 V system designs. This wide range allows direct interfacing with common logic families and simplifies power architecture in mixed-voltage applications. The device maintains full functionality-including ADC accuracy, Flash programming, and debug interface-across this entire range, as verified in the DC Characteristics table of Rev. 5 datasheet.

Does the MC9S08QG8MFQE support in-circuit debugging, and how is it implemented?

Yes, the MC9S08QG8MFQE supports single-wire background debugging via the BKGD/MS pin, enabling real-time bus capture, breakpoint setting (one active + two in debug module), and register inspection without halting system clocks. This interface requires only one signal line and ground, minimizing PCB routing overhead. The debug module includes an eight-deep FIFO for flow-address logging, making MC9S08QG8MFQE suitable for resource-constrained development environments.

What package type and thermal characteristics does the MC9S08QG8MFQE use?

The MC9S08QG8MFQE uses a 16-pin QFN package (98ASA00671D) measuring 3 mm × 3 mm with 0.5 mm pitch and an exposed thermal pad. This package delivers superior thermal resistance compared to TSSOP or PDIP variants, enabling sustained operation at 105°C ambient when the pad is soldered to a thermal plane. The copper-wire bonding (per QFN_Addendum Rev. 0) improves interconnect reliability versus legacy gold-wire versions.

Can the MC9S08QG8MFQE generate PWM signals, and what modes are supported?

Yes, the MC9S08QG8MFQE's TPM module provides two independent channels capable of buffered edge-aligned PWM and buffered center-aligned PWM. Each channel supports input capture, output compare, and PWM generation with programmable period and duty cycle. Center-aligned mode reduces EMI in motor control applications, while edge-aligned mode simplifies timing-critical tasks like LED dimming or power supply gate driving.

How does the internal clock system of the MC9S08QG8MFQE ensure timing accuracy across temperature and voltage?

The MC9S08QG8MFQE uses an Internal Clock Source (ICS) module with a factory-trimmed internal reference and Frequency-Locked Loop (FLL). This achieves ±0.2% resolution and ±2% deviation over the full industrial temperature and voltage range. The FLL locks to either the internal reference or an external crystal, allowing stable bus frequencies from 1 MHz to 10 MHz without requiring external timing components in many applications.