NXP Semiconductors MC9S08GT16ACFBE

Overview

MC9S08GT16ACFBE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 16 KB Flash, 2 KB RAM, 40-MHz CPU, and integrated peripherals including dual SCI, SPI, I²C, 10-bit ATD, and dual TPM timer/PWM modules. It operates from 1.8–3.6 V and supports three low-power stop modes - used in industrial sensor nodes, motor control interfaces, and battery-powered embedded controllers.

For engineers reviewing the MC9S08GT16ACFBE datasheet, MC9S08GT16ACFBE pinout, MC9S08GT16ACFBE application, or MC9S08GT16ACFBE equivalent, key selection criteria include QFN-32 package compatibility, internal FLL clocking with ±0.5% accuracy across voltage/temperature, 8 high-current I/O pins (20 mA), background debug interface, and Flash security features for firmware protection.

Technical Context

The MC9S08GT16ACFBE implements the HCS08 CPU core with HC08 instruction set extension (BGND), supporting up to 32 interrupt/reset sources and real-time interrupt (RTI) in all operating modes. Its internal clock generator (ICG) provides multiple modes - FEI, FEE, FBE - with frequency-locked-loop (FLL) stabilization and ±0.2% trimming resolution.

Peripherals include two independent serial communication interfaces (SCI1/SCI2), a single SPI module, one I²C bus controller, an 8-channel 10-bit analog-to-digital converter (ATD), and two timer/PWM modules (TPM1 with 3 channels, TPM2 with 2 channels). The device integrates keyboard interrupt (KBI) support on Port A and software-selectable pullups on all general-purpose I/O ports.

Key Specifications

Pinout & Package

The MC9S08GT16ACFBE is housed in a 32-pin QFN package (98ASA00473D) with exposed thermal pad, copper-wire interconnect, and 0.5 mm pitch. Pinout conforms to Freescale's MC9S08GT16A series mechanical drawing for 32-QFN.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9KEAZ128AMLH and MC9RS08LA8, the MC9S08GT16ACFBE delivers optimal balance of proven HCS08 toolchain support, integrated dual-serial and dual-TPM capability, and low-power operation - making it ideal for legacy-compatible upgrades and resource-constrained industrial control.

Availability

MC9S08GT16ACFBE is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance control, energy meter interfaces, and portable diagnostic tools requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08GT16ACFBE 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 MC9S08GT16ACFBE belongs to the HCS08 microcontroller family, designed for cost-sensitive, low-power embedded control applications requiring robust analog integration, serial connectivity, and field-programmable Flash memory.

FAQ

What is the package type and pin count of the MC9S08GT16ACFBE?

The MC9S08GT16ACFBE uses a 32-pin QFN package (case outline 98ASA00473D) with 0.5 mm pitch and an exposed thermal pad. This copper-wire QFN variant replaces earlier gold-wire versions and is fully compatible with standard reflow profiles for lead-free assembly. The MC9S08GT16ACFBE pinout supports 38 GPIO signals depending on configuration, with dedicated functions for debugging, clocking, and analog reference.

Does the MC9S08GT16ACFBE support in-circuit debugging, and what interface does it use?

Yes, the MC9S08GT16ACFBE supports in-circuit debugging via a single-wire Background Debug Mode (BDM) interface on the PTG0/BKGD/MS pin. This allows real-time bus monitoring, flash programming, and breakpoint execution without requiring additional debug hardware beyond a BDM pod. The MC9S08GT16ACFBE implements the full on-chip debug module with two comparators, nine trigger modes, and an eight-deep FIFO for flow-address capture - essential for deterministic firmware validation.

What are the supported clock sources for the MC9S08GT16ACFBE?

The MC9S08GT16ACFBE supports multiple clock sources through its Internal Clock Generator (ICG): internal RC oscillator (trimmed to ±0.5%), external crystal/resonator (32 kHz to 8 MHz), or external clock input. It operates in FEI (FLL Engaged Internal), FEE (FLL Engaged External), and FBE (FLL Bypassed External) modes. The MC9S08GT16ACFBE's FLL achieves stable bus frequencies up to 40 MHz with automatic calibration - eliminating need for precision external crystals in many applications.

Can the MC9S08GT16ACFBE operate from a single 3.3 V supply, and what is its minimum operating voltage?

Yes, the MC9S08GT16ACFBE operates across a 1.8 V to 3.6 V supply range, making it fully compatible with standard 3.3 V systems. Flash programming and erasure are guaranteed down to 1.8 V, enabling robust operation in battery-powered or brownout-prone environments. The MC9S08GT16ACFBE's Low-Voltage Detect (LVD) circuit can be configured to assert reset or interrupt below user-defined thresholds - critical for preserving data integrity during voltage sag.

How many serial communication interfaces does the MC9S08GT16ACFBE integrate, and what protocols do they support?

The MC9S08GT16ACFBE integrates two independent Serial Communication Interface (SCI) modules (SCI1 and SCI2), one Serial Peripheral Interface (SPI) module, and one Inter-Integrated Circuit (I²C) bus module. SCI supports asynchronous full-duplex UART operation; SPI supports master/slave mode with configurable polarity/phase; I²C supports standard-mode (100 kbps) and fast-mode (400 kbps) transfers. This multi-protocol capability makes the MC9S08GT16ACFBE suitable for heterogeneous peripheral interfacing without external bridge ICs.