NXP Semiconductors MC9S08AC16CFJER

Overview

MC9S08AC16CFJER from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 16 KB Flash, 1 KB RAM, 40-MHz CPU, 20-MHz bus frequency, and integrated peripherals including dual SCI, SPI, I²C, three 16-bit TPM modules, 8-channel 10-bit ADC, and KBI - used in industrial control panels and consumer appliance mainboards.

For engineers reviewing the MC9S08AC16CFJER datasheet, MC9S08AC16CFJER pinout, MC9S08AC16CFJER application, or MC9S08AC16CFJER equivalent, key selection criteria include QFN-48 package compatibility, on-chip debug support with breakpoint capability, COP watchdog independence, low-voltage detection interrupt/reset behavior, and FLASH block protection configuration.

Technical Context

The MC9S08AC16CFJER implements the S08CPUV2 core with HC08 instruction set extension (BGND), background debugging system (BDM), and eight-deep FIFO for trace data. Its internal clock generator supports FEI/FEE/FBE modes with NVM-trimmed precision and external crystal/resonator/clock input options.

Peripherals are memory-mapped and share a unified 20-MHz bus. The three TPM modules provide flexible PWM generation (edge-aligned or buffered center-aligned), input capture, and output compare across up to 8 channels total. The ADC includes automatic compare and temperature sensor interface.

Key Specifications

Pinout & Package

MC9S08AC16CFJER is housed in a 48-pin quad flat no-lead (QFN) package with exposed thermal pad (case outline 98ASA00466D), compatible with copper-wire bonding per Freescale QFN migration addendum.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08AC16CFJER, MC9S08AC60CFJER offers scalable Flash without peripheral or pinout change, whereas S9KEAZ128AMLH provides architectural upgrade to ARM with greater compute headroom but requires firmware rearchitecture.

Availability

MC9S08AC16CFJER is available at Aetrix Electronics and suitable for industrial control panels, home appliance mainboards, and building automation interfaces requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08AC16CFJER 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 MC9S08AC16CFJER belongs to the legacy HCS08 microcontroller family designed for cost-sensitive, low-power embedded control applications in appliances, industrial equipment, and consumer electronics.

FAQ

What is the package type and pin count of the MC9S08AC16CFJER?

The MC9S08AC16CFJER uses a 48-pin quad flat no-lead (QFN) package with exposed thermal pad, designated case outline 98ASA00466D per Freescale's QFN migration addendum. This package supports copper-wire bonding and is RoHS-compliant. Pin assignments match the MC9S08AC16 series datasheet Rev. 9, with dedicated VDD/VSS pairs, XTAL/EXTAL, BKGD/MS, RESET, and multi-function GPIO ports.

Does the MC9S08AC16CFJER support in-circuit debugging?

Yes, the MC9S08AC16CFJER integrates a full background debug module (BDM) accessible via the BKGD/MS pin. It supports single breakpoint setting during runtime, two additional breakpoints in the debug module, and eight-deep FIFO for trace data. The module enables real-time register inspection, memory read/write, and non-intrusive flow monitoring without halting peripheral operation - all confirmed in the MC9S08AC16 Series Data Sheet Rev. 9, Section 15.

What clock sources does the MC9S08AC16CFJER support?

The MC9S08AC16CFJER supports multiple clock sources: external crystal or ceramic resonator (via XTAL/EXTAL), external clock signal, and internally generated clock with NVM-trimmed precision. Its internal clock generator (ICG) operates in FEI, FEE, and FBE modes, enabling bus frequencies up to 20 MHz. Trim values stored in flash allow ±2% accuracy without external components - detailed in Chapter 8 of the Rev. 9 datasheet.

How many analog-to-digital converter channels does the MC9S08AC16CFJER have?

The MC9S08AC16CFJER features an 8-channel, 10-bit successive approximation register (SAR) ADC with built-in temperature sensor and automatic compare function. Channels are multiplexed across dedicated analog input pins (e.g., AD0–AD7), and conversion can be triggered by software, timer, or external event. Reference voltage is selectable between internal bandgap and external VREFH/VREFL - specified in Chapter 14 of the MC9S08AC16 Series Data Sheet Rev. 9.

Is the MC9S08AC16CFJER pin-compatible with other members of the MC9S08ACxx family?

Yes, the MC9S08AC16CFJER shares identical pinout and package (48-QFN) with MC9S08AC60CFJER and MC9S08AC128CFJER per Freescale's ordering information in Appendix B of Rev. 9. All three use case outline 98ASA00466D and support identical peripheral mappings, allowing hardware reuse across memory variants. However, Flash size and security features differ - verify memory map and FOPT register settings for each variant.