NXP Semiconductors MC9S08QG8MFFE

Overview

MC9S08QG8MFFE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller featuring a 20-MHz CPU, 8 KB Flash, 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 sensor interfaces and small appliance controllers.

For engineers reviewing the MC9S08QG8MFFE datasheet, MC9S08QG8MFFE pinout, MC9S08QG8MFFE application, or MC9S08QG8MFFE equivalent, key selection criteria include its 16-pin QFN package with exposed pad, single-wire background debug interface, internal clock source with FLL, low-voltage detection, and FLASH block protection for firmware integrity in cost-sensitive, power-aware designs.

Technical Context

The MC9S08QG8MFFE implements the HCS08 CPU core with HC08 instruction set extension and BGND instruction, supporting up to 32 interrupt/reset sources and hardware-triggered ADC conversions via RTI. 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 include an 8-channel 10-bit ADC with internal bandgap reference and temperature sensor, dual-channel TPM supporting edge-aligned and center-aligned PWM, and analog comparator with output routable to TPM. The device supports Wait and three Stop modes (Stop1/Stop2/Stop3), with COP watchdog configurable to run from dedicated 1-kHz internal clock or bus clock.

Key Specifications

Pinout & Package

MC9S08QG8MFFE uses a 16-pin QFN package (case outline 98ASA00671D) with 4 mm × 4 mm body, 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 MC9S08QG8MFFE, MC9RS08KB12 offers lower gate count and cost but omits ADC and FLASH capacity, while S9KEAZ128AMLH delivers ARM-class performance and expanded peripherals at the expense of legacy HCS08 code compatibility and increased power consumption in active mode.

Availability

MC9S08QG8MFFE is available at Aetrix Electronics and suitable for smart thermostat sensor nodes, industrial motor control interfaces, white goods control panels, and medical diagnostic handhelds requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC9S08QG8MFFE 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 MC9S08QG8MFFE belongs to the HCS08 microcontroller family designed for cost-sensitive, low-power embedded control applications requiring high integration density, robust debug capability, and industrial-grade reliability in minimal footprint packages.

FAQ

What is the maximum operating frequency of the MC9S08QG8MFFE CPU core?

The MC9S08QG8MFFE features an HCS08 CPU core with a maximum bus frequency of 20 MHz. This is achieved using the internal clock source (ICS) with frequency-locked loop (FLL) or external oscillator input. The actual instruction execution rate depends on bus frequency and instruction cycle count, with most instructions executing in 1–3 bus cycles. The MC9S08QG8MFFE maintains timing compliance across its full operating voltage (2.7–5.5 V) and temperature (–40°C to +105°C) range.

Does the MC9S08QG8MFFE support in-circuit debugging, and what interface is used?

Yes, the MC9S08QG8MFFE supports in-circuit debugging via a single-wire background debug interface using the BKGD/MS pin. This interface enables real-time bus capture, breakpoint setting (one active plus two in debug module), and on-chip emulation without requiring additional pins or JTAG hardware. The MC9S08QG8MFFE debug module includes an 8-deep FIFO for storing change-of-flow addresses, facilitating trace analysis during development and validation.

What ADC capabilities does the MC9S08QG8MFFE provide, and how is it triggered?

The MC9S08QG8MFFE integrates an 8-channel, 10-bit successive approximation ADC with internal bandgap reference, temperature sensor channel, and automatic compare function. Conversions can be initiated manually or triggered by hardware - specifically, the Real-Time Interrupt (RTI) counter provides autonomous, periodic triggering without CPU involvement. The MC9S08QG8MFFE ADC supports asynchronous clocking and configurable sample time, enabling accurate measurements across varying signal dynamics.

What power-saving modes are available on the MC9S08QG8MFFE, and what is the lowest current draw?

The MC9S08QG8MFFE supports Wait mode and three Stop modes (Stop1, Stop2, Stop3). Stop3 offers the lowest power state, drawing less than 1 µA typical at 3.3 V and 25°C with all clocks disabled except the COP watchdog's 1-kHz internal source. In Stop3, the ADC, TPM, and SCI remain disabled, but RAM contents and selected register states are retained. The MC9S08QG8MFFE exits Stop3 via RESET, IRQ, or internal wakeup events like RTI timeout.

Is the MC9S08QG8MFFE pin-compatible with other members of the QG series, such as the MC9S08QG4?

No, the MC9S08QG8MFFE is not fully pin-compatible with the MC9S08QG4 despite sharing the same 16-pin QFN package (98ASA00671D). While both use identical mechanical footprint and thermal pad, their pin functions differ in critical areas: MC9S08QG4 lacks the VREFH/VREFL pins and reassigns some ADC input channels. The MC9S08QG8MFFE has dedicated analog reference inputs and full 8-channel ADC mapping, whereas MC9S08QG4 supports only 4 ADC inputs. PCB layout must be verified per specific variant.