NXP Semiconductors MC9S08AC48CFUE

Overview

MC9S08AC48CFUE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 48 KB flash, 1 KB RAM, and 48-pin QFN package. It features a 40-MHz CPU, dual SCI modules supporting LIN 2.0, 16-channel 10-bit ADC, and hardware CRC engine - deployed in automotive body control modules requiring deterministic real-time response and flash security.

For engineers reviewing the MC9S08AC48CFUE datasheet, MC9S08AC48CFUE pinout, MC9S08AC48CFUE application, or MC9S08AC48CFUE equivalent, key selection criteria include QFN-48 thermal performance, on-chip debug support for production programming, LIN-compliant SCI timing accuracy, and flash protection options for firmware IP protection.

Technical Context

The MC9S08AC48CFUE implements the S08CPUV2 core with HC08 instruction set extension including BGND, operating at up to 40 MHz CPU frequency and 20 MHz bus clock. Its internal clock generator (ICG) supports precision NVM-trimmed internal reference with crystal/resonator/external clock options.

Peripherals include two SCI modules with master/slave extended break handling per LIN 2.0 and SAE J2602, one SPI, one I²C (up to 100 kbps), three TPM timer modules (2×2-channel + 1×6-channel), and a 16-channel 10-bit ADC with automatic compare function and temperature sensor input.

Key Specifications

Pinout & Package

MC9S08AC48CFUE uses a 48-pin QFN package (case outline 98ASA00466D) with thermally enhanced exposed pad. Pin assignments follow the MC9S08AC60 Series Data Sheet Rev. 3, Section 2.2, and are validated for this specific variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08AC48CFUE, the MC9S08AC60CFUE offers direct flash/RAM headroom within identical mechanical and electrical constraints, while the S9KEAZ128AMLH provides architectural modernization at the cost of full requalification - making the former ideal for incremental feature upgrades and the latter suited for next-generation platform development.

Availability

MC9S08AC48CFUE is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart actuator control, and medical device monitoring requiring stable component supply and long-term lifecycle assurance.

Supply support for MC9S08AC48CFUE 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 MC9S08AC48CFUE belongs to the legacy HCS08 family, designed specifically for cost-sensitive, real-time automotive sub-systems requiring robust LIN communication, flash security, and low-power operation in constrained environments.

FAQ

What is the maximum operating frequency of the MC9S08AC48CFUE CPU core?

The MC9S08AC48CFUE CPU core operates at a maximum frequency of 40 MHz, with a corresponding 20-MHz internal bus clock. This timing is achieved using the internal clock generator (ICG) with NVM-trimmed reference or external crystal/resonator sources, and is fully specified across the industrial temperature range (−40°C to +105°C) per the MC9S08AC60 Series Data Sheet Rev. 3.

Does the MC9S08AC48CFUE support LIN 2.0 protocol natively?

Yes, the MC9S08AC48CFUE supports LIN 2.0 natively through its two SCI modules, which implement master extended break generation and slave extended break detection per SAE J2602. The hardware handles 13-bit break fields without CPU intervention, enabling deterministic timing for automotive network compliance - confirmed in Section 13 of the MC9S08AC60 Series Data Sheet Rev. 3.

What package type and footprint does the MC9S08AC48CFUE use?

The MC9S08AC48CFUE uses a 48-pin QFN package with case outline number 98ASA00466D - a copper-wire-migrated version replacing the original gold-wire 98ARL10606D. It measures 7 mm × 7 mm with 0.5 mm pitch and includes an exposed thermal pad, as documented in the QFN_Addendum Rev. 0 (July 2014) and MC9S08AC60 Series Mechanical Drawings (Appendix B).

How much on-chip flash and RAM does the MC9S08AC48CFUE provide?

The MC9S08AC48CFUE integrates 48 KB of on-chip FLASH memory with block protection and security lock features, plus 1 KB of on-chip RAM. These values are fixed for this variant and differ from other members of the AC-series (e.g., MC9S08AC60CFUE has 60 KB flash). All memory specifications are verified in Chapter 4 and Appendix A of the MC9S08AC60 Series Data Sheet Rev. 3.

Is background debugging supported on the MC9S08AC48CFUE?

Yes, the MC9S08AC48CFUE includes full Background Debug Mode (BDM) support via the BKGD/MS pin. It features an on-chip debug module with breakpoint capability, two comparators, nine trigger modes, and an eight-deep FIFO for change-of-flow tracing - all detailed in Chapter 16 of the MC9S08AC60 Series Data Sheet Rev. 3. No external emulator hardware is required for basic in-circuit debugging.