NXP Semiconductors MC9S08QG84CFQE

Overview

MC9S08QG84CFQE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 8 KB Flash, 512 bytes RAM, 20-MHz CPU, internal clock source (FLL), and integrated peripherals including 10-bit ADC, SPI, I²C, SCI, TPM, ACMP, and KBI. It targets cost-sensitive embedded control in appliance motor drives, industrial sensors, and lighting systems.

For engineers reviewing the MC9S08QG84CFQE datasheet, MC9S08QG84CFQE pinout, MC9S08QG84CFQE application, or MC9S08QG84CFQE equivalent, key selection criteria include QFN-16 package compatibility, 12 GPIO + 1 input-only + 1 output-only I/O count, 10 mA per output drive strength, on-chip background debug interface, and support for Wait/Stop1/Stop2/Stop3 low-power modes.

Technical Context

The MC9S08QG84CFQE implements the HCS08 CPU core with HC08 instruction set extension, BGND instruction, and hardware breakpoint support via an on-chip debug module featuring two comparators and nine trigger modes. 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 by RTI and automatic compare against internal bandgap reference; the TPM provides dual-channel PWM with edge- and center-aligned modes; and the ACMP output can be routed directly to TPM for analog-triggered timing events.

Key Specifications

Pinout & Package

MC9S08QG84CFQE is housed in a 16-pin QFN package (case outline 98ASA00671D), 4 mm × 4 mm × 0.95 mm, with 0.5 mm lead pitch and exposed thermal pad for enhanced thermal performance. The package is RoHS-compliant and designed for reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08QG84CFQE, MC9S08QG8CDTE offers identical functionality in TSSOP for easier hand-soldering but reduced thermal performance, while S9KEAZ128AMLH delivers significantly higher integration and performance at the cost of architecture change and package incompatibility.

Availability

MC9S08QG84CFQE is available at Aetrix Electronics and suitable for smart lighting control, industrial sensor nodes, appliance motor interfaces, and small-appliance user interfaces requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08QG84CFQE 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, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The MC9S08QG84CFQE belongs to the HCS08 microcontroller family, designed for cost-optimized, low-power embedded control in appliances, lighting, and industrial subsystems where compact size and debug capability are critical.

FAQ

What is the operating voltage range for the MC9S08QG84CFQE?

The MC9S08QG84CFQE operates from 2.7 V to 3.6 V across its full temperature range. This narrow supply window supports stable internal clock generation and reliable FLASH programming/erasing without external regulators. All I/O pins are 5 V tolerant only when configured as inputs with internal pullups enabled - outputs are strictly 3.3 V logic level. The MC9S08QG84CFQE datasheet specifies DC characteristics under these conditions in Appendix A.

Does the MC9S08QG84CFQE support in-circuit debugging?

Yes, the MC9S08QG84CFQE includes a single-wire background debug module compliant with Freescale's BDM specification. It enables full read/write memory access, register inspection, breakpoint setting (one hardware + two debug-module breakpoints), and real-time bus capture without halting CPU execution. Debug communication uses the BKGD/MS pin, requiring only one signal line and ground - no JTAG header needed. This capability is fully implemented in the MC9S08QG84CFQE silicon.

What package type and dimensions does the MC9S08QG84CFQE use?

The MC9S08QG84CFQE is packaged in a 16-pin QFN (quad flat no-lead) with case outline number 98ASA00671D. Its physical dimensions are 4.0 mm × 4.0 mm × 0.95 mm, with 0.5 mm lead pitch and an exposed thermal pad centered on the bottom. This package supports automated reflow assembly and provides superior thermal dissipation compared to TSSOP or PDIP variants of the same device family.

Can the MC9S08QG84CFQE generate PWM signals?

Yes, the MC9S08QG84CFQE integrates a two-channel Timer/Pulse-Width Modulator (TPM) module capable of generating edge-aligned and center-aligned PWM waveforms. Each channel supports input capture, output compare, buffered PWM, and dead-time insertion. PWM resolution is programmable up to 16 bits, with independent duty cycle and period control. These features are implemented in hardware and require no CPU overhead once configured - a core capability of the MC9S08QG84CFQE.

Is there an internal voltage reference for the ADC in the MC9S08QG84CFQE?

Yes, the MC9S08QG84CFQE includes an internal bandgap voltage reference usable as VREFH for the 10-bit ADC. When selected, it provides a stable ~1.2 V reference independent of VDD fluctuations, enabling ratiometric measurements with improved accuracy. The reference is accessible via the ADC configuration register (ADCCFG) and works concurrently with the internal temperature sensor channel - both features are silicon-verified in the MC9S08QG84CFQE.