NXP Semiconductors MC9S08QG8CFFE

Overview

MC9S08QG8CFFE 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, ACMP, and MTIM. It operates in industrial temperature range (–40°C to +105°C) and supports multiple low-power stop modes. It is used in cost-sensitive embedded control applications such as appliance motor control and sensor interface modules.

For engineers reviewing the MC9S08QG8CFFE datasheet, MC9S08QG8CFFE pinout, MC9S08QG8CFFE application, or MC9S08QG8CFFE equivalent, key selection criteria include its 16-pin QFN package with exposed pad, single-wire background debug interface, internal clock source with FLL and ±2% accuracy over voltage/temperature, and hardware-triggerable ADC with temperature sensor channel.

Technical Context

The MC9S08QG8CFFE implements the S08CPUV2 core with HC08 instruction set extension and BGND instruction support. Its debug module includes two comparators, nine trigger modes, and an eight-deep FIFO for flow-address capture - enabling real-time in-circuit debugging without external probes.

System clocking combines ICS (FLL-based internal source, 1–10 MHz bus frequency) and XOSC (crystal/resonator support from 31.25 kHz to 16 MHz). The ADC features asynchronous clocking, automatic compare, internal bandgap reference, and RTI-triggered conversion - all configurable without CPU intervention.

Key Specifications

Pinout & Package

MC9S08QG8CFFE is housed in a 16-pin QFN package (case outline 98ASA00671D), 4 mm × 4 mm body, 0.5 mm pitch, with exposed thermal pad for enhanced thermal dissipation 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 MC9S08QG8CFFE, the MC9S08QG4CFFE offers reduced memory for simpler applications, while the S9S08QG8CFFE provides identical functionality under NXP's post-acquisition support framework - enabling continuity without hardware redesign.

Availability

MC9S08QG8CFFE is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, smart lighting drivers, and point-of-sale peripherals requiring stable component supply and long-lifecycle support.

Supply support for MC9S08QG8CFFE 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 chips, acquired by NXP Semiconductors in 2015. Its HCS08 family pioneered cost-optimized 8-bit MCU architectures for industrial and consumer markets.

The MC9S08QG8CFFE belongs to the HCS08 QG-series, designed specifically for space-constrained, low-cost embedded control where small footprint, integrated analog peripherals, and single-wire debug are essential.

FAQ

What is the operating voltage range for the MC9S08QG8CFFE?

The MC9S08QG8CFFE operates from 2.7 V to 5.5 V across the full industrial temperature range (–40°C to +105°C). This wide supply range supports both 3.3 V and 5 V system designs without level-shifting, and the internal LVD circuit provides programmable reset thresholds at 2.5 V or 2.7 V to prevent malfunction during brownout conditions. The MC9S08QG8CFFE maintains full peripheral functionality and Flash programming capability across this entire voltage window.

Does the MC9S08QG8CFFE support in-circuit debugging without additional hardware?

Yes, the MC9S08QG8CFFE integrates a single-wire background debug module accessible via the BKGD/MS pin (PTA1), eliminating the need for dedicated JTAG headers or external debug probes. This interface supports full read/write memory access, breakpoint setting (one active plus two in debug module), and real-time bus capture - all using only one I/O pin and minimal external components (pullup resistor and series termination). The MC9S08QG8CFFE debug architecture is fully compatible with standard P&E Micro and SEGGER tools.

What package type and thermal characteristics does the MC9S08QG8CFFE use?

The MC9S08QG8CFFE is packaged in a 16-pin QFN (98ASA00671D) with 4 mm × 4 mm body, 0.5 mm pitch, and an exposed thermal pad. The pad must be soldered to a PCB ground plane to achieve θ_JA ≈ 50°C/W and sustain continuous operation at +105°C ambient. This package enables high-density layouts while delivering thermal performance comparable to larger SOIC variants - a key advantage for space-constrained applications like smart lighting modules and portable sensors.

Can the MC9S08QG8CFFE's ADC measure temperature internally?

Yes, the MC9S08QG8CFFE includes a calibrated on-die temperature sensor connected to ADC channel AD7. When enabled via the APCTL registers, it delivers ratiometric readings referenced to the internal bandgap voltage, requiring no external components. The sensor is factory-trimmed and supports accurate system-level thermal monitoring across –40°C to +105°C - commonly used in motor control and power supply thermal foldback circuits. The MC9S08QG8CFFE ADC also supports hardware triggering via the RTI timer for autonomous sampling.

How does the MC9S08QG8CFFE handle low-power operation in battery-powered systems?

The MC9S08QG8CFFE supports five power modes: Run, Wait, Stop1, Stop2, and Stop3. In Stop3 mode, current consumption drops below 1 µA with RTC and LVD active - ideal for infrequent wake-up events in battery-powered nodes. The COP watchdog can run from a dedicated 1-kHz internal clock, allowing safe deep-sleep operation without external timing components. Wake-up sources include IRQ, KBI, RTI, and ACMP - all configurable to minimize active time. The MC9S08QG8CFFE's low-voltage detection and Flash block protection further enhance reliability in energy-constrained deployments.