NXP Semiconductors MC9S08GT8ACFCE

Overview

MC9S08GT8ACFCE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 8 KB flash, 512 B RAM, 40-MHz CPU, and integrated peripherals including dual SCI, SPI, I²C, 10-bit ATD, and dual TPM modules. It operates from 1.8–3.6 V and supports three low-power stop modes, making it suitable for battery-powered industrial sensors and motor control interfaces.

For engineers reviewing the MC9S08GT8ACFCE datasheet, MC9S08GT8ACFCE pinout, MC9S08GT8ACFCE application, or MC9S08GT8ACFCE equivalent, key selection criteria include its QFN-32 package, copper-wire interconnect revision (98ASA00473D), on-chip background debug interface, real-time interrupt capability in all power modes, and FLASH programmability down to 1.8 V.

Technical Context

The MC9S08GT8ACFCE implements the HCS08 CPU core with HC08 instruction set extension (BGND), supporting up to 32 interrupt/reset sources and a hardware frequency-locked loop (FLL) clock generator. Its internal clock trimming achieves ±0.2% resolution and ±0.5% deviation across voltage and temperature.

Peripherals include two serial communication interfaces (SCI), one SPI, one I²C bus module, an 8-channel 10-bit analog-to-digital converter (ATD), and two timer/PWM modules (TPM): one 3-channel and one 2-channel unit. The device features 38 general-purpose I/O pins plus one output-only pin, with eight high-current (20 mA) outputs and software-selectable internal pullups.

Key Specifications

Pinout & Package

MC9S08GT8ACFCE is housed in a 32-pin QFN package (exposed pad) with copper-wire interconnect per Freescale document 98ASA00473D. The package measures 5 mm × 5 mm × 0.85 mm and requires thermal pad soldering for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08GT8ACFCE, MC9S08GT16ACFCE offers double flash and RAM in identical packaging for seamless upgrade, while S9KEAZ128AMLH provides ARM-based scalability but requires toolchain and firmware rearchitecture.

Availability

MC9S08GT8ACFCE is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance controllers, and motor drive interfaces requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08GT8ACFCE 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 leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.

The MC9S08GT8ACFCE belongs to the legacy HCS08 microcontroller family designed for cost-sensitive, low-power embedded control in resource-constrained environments.

FAQ

What is the maximum operating frequency of the MC9S08GT8ACFCE?

The MC9S08GT8ACFCE supports a maximum bus frequency of 40 MHz, achieved via its internal frequency-locked loop (FLL) using either internal RC or external crystal/resonator sources. This frequency applies to the core and peripheral clock domains under specified voltage (1.8–3.6 V) and temperature conditions per Freescale datasheet Rev. 1.

Does the MC9S08GT8ACFCE support in-circuit debugging?

Yes, the MC9S08GT8ACFCE integrates a single-wire background debug (BKGD) interface that enables full in-circuit debugging, flash programming, and real-time bus capture without requiring a JTAG header. The BKGD/MS pin provides breakpoint setting, memory inspection, and register access during active execution or stop modes.

What package type and dimensions does the MC9S08GT8ACFCE use?

The MC9S08GT8ACFCE uses a 32-pin QFN package with exposed thermal pad, documented under Freescale case outline number 98ASA00473D. Its physical dimensions are 5.0 mm × 5.0 mm × 0.85 mm, and it employs copper-wire interconnect per the QFN Addendum Rev. 0 (July 2014).

Can the MC9S08GT8ACFCE operate from a single 3.3 V supply?

Yes, the MC9S08GT8ACFCE operates across a supply range of 1.8 V to 3.6 V, making 3.3 V fully compliant. At 3.3 V, it achieves full 40-MHz bus performance and meets all electrical specifications in the datasheet, including ADC accuracy, I/O drive strength, and timing margins.

How many analog input channels does the MC9S08GT8ACFCE support?

The MC9S08GT8ACFCE integrates an 8-channel, 10-bit analog-to-digital converter (ATD). All eight channels are mapped to Port B pins (PTB0–PTB7), and each channel supports programmable sample time, conversion trigger sources (software, TPM, or RTI), and result alignment options.