NXP Semiconductors MC9S08QG4CPAE

Overview

MC9S08QG4CPAE from Freescale Semiconductor is an 8-bit HCS08 microcontroller with 4 KB FLASH, 256 bytes RAM, 20-MHz CPU, internal clock source (FLL), and integrated peripherals including 8-channel 10-bit ADC, SCI, SPI, I²C, TPM, ACMP, and KBI - used in low-cost embedded control for appliance motor interfaces and sensor-based industrial modules.

For engineers reviewing the MC9S08QG4CPAE datasheet, MC9S08QG4CPAE pinout, MC9S08QG4CPAE application, or MC9S08QG4CPAE equivalent, key selection criteria include QFN-16 package compatibility, 12 GPIO + 1 input-only + 1 output-only pin count, 1.8–3.6 V operating voltage, on-chip background debug interface, and FLASH block protection for firmware security in cost-sensitive OEM designs.

Technical Context

The MC9S08QG4CPAE implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting single-wire background debugging and up to 32 interrupt/reset sources. Its ICS module integrates a frequency-locked loop (FLL) with precision-trimmed internal reference (±0.2% resolution, ±2% deviation over temp/voltage), enabling bus frequencies from 1 MHz to 10 MHz.

Peripherals include an 8-channel 10-bit ADC with hardware trigger via RTI, automatic compare, internal bandgap reference, and temperature sensor; dual-channel TPM supporting edge-aligned and center-aligned PWM; and analog comparator (ACMP) with output routable to TPM for event-driven timing control.

Key Specifications

Pinout & Package

MC9S08QG4CPAE is housed in a 16-pin quad flat no-lead (QFN) package (case outline 98ASA00671D), 3 mm × 3 mm body with exposed thermal pad. The package supports copper wire bonding and requires solder paste stencil design per EB806 guidelines for exposed pad reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08QG4CPAE, MC9S08QG8CPAE offers double FLASH/RAM in identical packaging for seamless firmware scaling, while S9KEAZ128AMLH delivers ARM-class performance at the cost of layout redesign and software rearchitecture - making the former ideal for memory-constrained upgrades and the latter for next-generation feature-rich platforms.

Availability

MC9S08QG4CPAE is available at Aetrix Electronics and suitable for appliance motor control, industrial sensor nodes, smart power outlets, and medical diagnostic sensor interfaces requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08QG4CPAE 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 (now part of NXP Semiconductors) is a global leader in embedded processing, automotive MCUs, and analog power solutions, with decades of expertise in industrial and consumer microcontrollers.

The MC9S08QG series targets cost-sensitive, low-power 8-bit embedded applications - designed specifically for appliance control, sensor interfacing, and simple automation where small footprint, debug capability, and analog integration are essential.

FAQ

What is the maximum operating frequency of the MC9S08QG4CPAE CPU core?

The MC9S08QG4CPAE features an HCS08 CPU core rated for up to 20 MHz operation. This frequency is achieved using the internal clock source (ICS) module's FLL, which can generate bus clocks from 1 MHz to 10 MHz; the CPU executes instructions at twice the bus clock rate, yielding a maximum 20-MHz instruction throughput. The MC9S08QG4CPAE maintains this performance across its full 1.8–3.6 V supply range and industrial temperature grade.

Does the MC9S08QG4CPAE support in-circuit debugging without external hardware?

Yes, the MC9S08QG4CPAE includes a single-wire background debug interface that enables full in-circuit emulation without external JTAG adapters. Using the BKGD/MS pin, developers can perform real-time bus capture, set breakpoints, inspect registers and memory, and step through code - all with only one dedicated signal line and no additional debug circuitry required on the target board.

What analog peripherals are integrated into the MC9S08QG4CPAE?

MC9S08QG4CPAE integrates three key analog peripherals: an 8-channel 10-bit ADC with internal bandgap reference and temperature sensor; an analog comparator (ACMP) with selectable internal reference and output routable to TPM; and an internal voltage reference usable by both ADC and ACMP. These enable standalone analog signal acquisition and conditioning without external components in applications like motor control and environmental monitoring.

Can the MC9S08QG4CPAE operate from a single 3.3 V supply?

Yes, the MC9S08QG4CPAE operates across a 1.8–3.6 V supply range, making 3.3 V fully compliant. At 3.3 V, it delivers full 20-MHz CPU performance, robust I/O drive (10 mA per pin), and guaranteed ADC accuracy (10-bit ENOB). The internal regulators and ICS FLL maintain stability across this range, and the RESET pin's internal pullup ensures reliable startup without external biasing.

Is the MC9S08QG4CPAE pin-compatible with other members of the QG family?

Yes, the MC9S08QG4CPAE in the 16-pin QFN package (98ASA00671D) shares identical pinout and electrical characteristics with MC9S08QG8CPAE. Both devices support the same peripheral mappings, I/O configurations, and debug interface - allowing direct substitution where increased FLASH/RAM capacity is needed without modifying PCB layout or firmware I/O initialization routines.