NXP Semiconductors MC9S08GT16ACFDE

Overview

MC9S08GT16ACFDE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller featuring a 40-MHz CPU, 16 KB on-chip FLASH, 2 KB RAM, and integrated peripherals including dual SCI, SPI, I²C, 10-bit 8-channel ADC, and two 3-/2-channel TPM timer/PWM modules. It operates from 1.8–3.6 V and targets low-power industrial sensor nodes and motor control interfaces.

For engineers reviewing the MC9S08GT16ACFDE datasheet, MC9S08GT16ACFDE pinout, MC9S08GT16ACFDE application, or MC9S08GT16ACFDE equivalent, key selection criteria include QFN-32 package compatibility, copper-wire interconnect reliability, real-time interrupt support in stop modes, and background debug interface (BDM) for in-circuit development.

Technical Context

The MC9S08GT16ACFDE implements the HCS08 CPU core with HC08 instruction set extension (BGND), supporting up to 32 interrupt/reset sources and three very low-power stop modes. Its internal clock generator includes FLL with ±0.5% deviation across voltage/temperature and ±0.2% trimming resolution.

Peripherals are tightly coupled to the 32-pin QFN package: Port G provides XTAL/EXTAL oscillator pins; Port A supports keyboard interrupt (KBI); Ports B–E allocate ADC inputs, SCI/SPI/I²C signals, and high-current (20 mA) GPIOs; the exposed thermal pad requires solder connection per EB806 guidelines.

Key Specifications

Pinout & Package

The MC9S08GT16ACFDE is housed in a 5 mm × 5 mm, 0.5 mm pitch, 32-pin QFN package (case outline 98ASA00473D) with an exposed thermal pad requiring PCB solder connection per Freescale EB806 recommendations.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08GT16ACFDE, S9KEAZ128AMLH offers modern ARM architecture and expanded peripheral set but demands full firmware rework, while MC9S08AC128CFUE retains HCS08 compatibility at the cost of non-drop-in packaging and unverified copper-wire reliability.

Availability

MC9S08GT16ACFDE is available at Aetrix Electronics and suitable for industrial sensor nodes, BLDC motor controllers, smart meter interfaces, and home appliance control panels requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08GT16ACFDE 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 delivering secure, energy-efficient solutions for automotive, industrial, IoT, and mobile applications.

The MC9S08GT16ACFDE belongs to the legacy HCS08 microcontroller family, designed specifically for cost-sensitive, low-power embedded systems requiring robust debug capability, mixed-signal integration, and long-lifecycle industrial deployment.

FAQ

What is the package type and thermal pad requirement for MC9S08GT16ACFDE?

The MC9S08GT16ACFDE uses a 32-pin QFN package (98ASA00473D) with an exposed thermal pad. Per Freescale EB806, this pad must be soldered to a PCB copper pour tied to VSS for thermal dissipation and EMI reduction. Failure to connect it may cause overheating or debug instability during sustained operation of the MC9S08GT16ACFDE.

Does MC9S08GT16ACFDE support in-circuit debugging, and what interface is used?

Yes, the MC9S08GT16ACFDE supports single-wire background debug (BDM) via the PTG0/BKGD/MS pin. This interface enables full in-circuit emulation-including breakpoint setting, real-time bus capture, and flash programming-without requiring additional JTAG hardware. The on-chip ICE module in the MC9S08GT16ACFDE provides nine trigger modes and an eight-deep FIFO for advanced debug workflows.

What are the supported clock sources for MC9S08GT16ACFDE, and how accurate is the internal oscillator?

The MC9S08GT16ACFDE supports internal RC, external crystal (32 kHz or 1–20 MHz), resonator, or external clock inputs. Its internal clock generator features FLL with ±0.5% deviation across voltage and temperature, and ±0.2% trimming resolution. This accuracy allows reliable UART communication at 115.2 kbps without external crystal-critical for cost-sensitive implementations of the MC9S08GT16ACFDE.

Can MC9S08GT16ACFDE operate reliably below 2.0 V, and what protections exist?

The MC9S08GT16ACFDE is rated for 1.8–3.6 V operation and includes low-voltage detection (LVD) with programmable thresholds (e.g., 2.0 V or 2.5 V). When voltage drops below the selected threshold, the MC9S08GT16ACFDE can generate either a reset or interrupt-preventing corrupted FLASH writes or erratic state machine behavior. This ensures deterministic failure response in battery-powered applications using the MC9S08GT16ACFDE.

How many high-current I/O pins does MC9S08GT16ACFDE have, and what is their drive strength?

The MC9S08GT16ACFDE provides eight high-current I/O pins (primarily on Port C), each capable of sourcing or sinking up to 20 mA continuously. These pins eliminate the need for external drivers in LED indicators, buzzer circuits, or small relay coils. Their availability is confirmed in the MC9S08GT16ACFDE datasheet Section 6.2.3 and enables direct interface with common electro-mechanical loads without added components.