NXP Semiconductors MC9S08AC16MFDE

Overview

MC9S08AC16MFDE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller designed for embedded control in consumer and industrial systems. It features a 40-MHz CPU, 16 KB on-chip Flash with block protection, 1 KB RAM, 8-channel 10-bit ADC, dual SCI, SPI, I²C, three 16-bit TPM modules (two 2-channel, one 4-channel), and up to 38 GPIO pins. It operates in automotive-grade temperature range and supports Wait/Stop2/Stop3 low-power modes.

For engineers reviewing the MC9S08AC16MFDE datasheet, MC9S08AC16MFDE pinout, MC9S08AC16MFDE application, or MC9S08AC16MFDE equivalent, key selection considerations include its QFN-48 package, internal clock generator with NVM trimming, background debug module with FIFO trace, COP watchdog with independent clock option, and integrated peripherals for motor control, sensor interfacing, and serial communication in cost-sensitive 8-bit designs.

Technical Context

The MC9S08AC16MFDE implements the S08CPUV2 core with HC08 instruction set extension (BGND), supporting single-breakpoint debugging and a 9-trigger-mode debug module with 8-deep FIFO. Its internal clock generator (S08ICGV4) offers multiple modes including FEI, FEE, FBE, and SCM, with precision NVM trimming for ±2% bus frequency accuracy over voltage and temperature.

Peripherals are tightly coupled to the 20-MHz internal bus: the 10-bit ADC includes automatic compare and temperature sensor; dual SCIs support 13-bit break; I²C runs up to 100 kbps under full bus loading; and TPM modules provide edge-aligned and buffered center-aligned PWM with input capture and output compare on all channels.

Key Specifications

Pinout & Package

MC9S08AC16MFDE is housed in a 48-pin QFN package (98ASA00466D) with 0.5 mm pitch and exposed thermal pad. The package supports copper-wire bonding per Freescale QFN migration addendum Rev. 0 (2014).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08AC16MFDE, MC9S08AW16A offers identical functionality with automotive hardening, whereas S9KEAZ128AMLH delivers a 32-bit upgrade path with expanded peripherals and memory - enabling either drop-in qualification upgrade or strategic architecture evolution.

Availability

MC9S08AC16MFDE is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, automotive body electronics, and smart lighting systems requiring stable component supply and long-term manufacturability.

Supply support for MC9S08AC16MFDE 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 MC9S08AC16MFDE belongs to the HCS08 family - a mature, cost-optimized 8-bit microcontroller line targeting resource-constrained embedded control where deterministic real-time response, low power, and minimal BOM cost are critical.

FAQ

What is the maximum operating frequency of the MC9S08AC16MFDE CPU core?

The MC9S08AC16MFDE CPU core supports a maximum frequency of 40 MHz. This is achieved via internal frequency multiplication of the bus clock, which runs at up to 20 MHz. The core's performance is optimized for deterministic real-time execution in control applications, and the 40-MHz specification is validated across the full industrial temperature range (-40°C to +105°C) per the official datasheet Rev. 9.

Does the MC9S08AC16MFDE include an integrated temperature sensor?

Yes, the MC9S08AC16MFDE includes an on-die temperature sensor connected to ADC channel AN7. Its output is calibrated and documented in the Electrical Characteristics appendix (Table A-9), providing a usable reading with ±5°C accuracy across the operating temperature range. This sensor enables thermal monitoring without external components, and the MC9S08AC16MFDE firmware can read it directly via standard ADC conversion sequences.

What debug interface does the MC9S08AC16MFDE support, and what hardware is required?

The MC9S08AC16MFDE supports the Background Debug Mode (BDM) interface using the BKGD/MS pin. It requires only a single-wire connection to a compatible BDM pod (e.g., P&E Multilink or OSJTAG). No JTAG header or additional pins are needed. The MC9S08AC16MFDE debug module includes a 8-deep FIFO and supports breakpoints, register inspection, and flash programming - all accessible through standard CodeWarrior or open-source GDB toolchains.

Can the MC9S08AC16MFDE operate without an external crystal or resonator?

Yes, the MC9S08AC16MFDE can operate using its internal clock generator (ICG) in Self-Clocked Mode (SCM) or FLL Engaged Internal (FEI) mode. With NVM-trimmed oscillator calibration, the MC9S08AC16MFDE achieves ±2% bus frequency accuracy across voltage and temperature - sufficient for UART communication, PWM timing, and general-purpose control without any external timing components.

What package type and pin count does the MC9S08AC16MFDE use?

The MC9S08AC16MFDE uses a 48-pin Quad Flat No-Lead (QFN) package with 0.5 mm pitch and an exposed thermal pad. Its mechanical drawing is identified as 98ASA00466D per Freescale's QFN migration addendum. This package replaces the earlier gold-wire version (98ARL10606D) and is optimized for automated assembly and thermal performance in space-constrained applications.