NXP Semiconductors MC9S08AC48CFGE

Overview

MC9S08AC48CFGE from Freescale Semiconductor is an 8-bit HCS08 microcontroller featuring a 40-MHz CPU core, 48 KB on-chip FLASH memory, and 1 KB RAM. It integrates dual SCI modules supporting LIN 2.0 and SAE J2602, a 16-channel 10-bit ADC, and three timer/PWM modules - deployed in automotive body control, industrial sensor nodes, and smart actuator firmware.

For engineers reviewing the MC9S08AC48CFGE datasheet, MC9S08AC48CFGE pinout, MC9S08AC48CFGE application, or MC9S08AC48CFGE equivalent, key selection criteria include QFN-48 package compatibility, internal clock generator with NVM trimming, COP watchdog with independent 1 kHz source, and hardware CRC acceleration for firmware integrity verification.

Technical Context

The MC9S08AC48CFGE implements the HCS08 CPUV2 core with HC08 instruction set extension including BGND, operating at up to 40 MHz CPU frequency and 20 MHz bus frequency. Its internal clock generator (ICG) supports crystal, resonator, external clock, or internally trimmed RC sources - with precision NVM-based trimming enabling ±2% accuracy over temperature and voltage.

Peripheral integration includes two SCI modules with master/slave extended break handling for LIN compliance, a 16-bit TPM module with buffered centered PWM, and a dedicated hardware CRC engine using a 16-bit shift register for fast memory checksums. All peripherals are accessible via memory-mapped registers with interrupt vectoring support for up to 32 sources.

Key Specifications

Pinout & Package

MC9S08AC48CFGE is housed in a 48-pin QFN package (98ASA00466D) with exposed thermal pad, copper-wire bonding, and 0.5 mm pitch. The package supports reflow soldering and provides low-inductance ground path via the exposed pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08AC48CFGE, MC9S08AC60CFGE offers direct memory upgrade within identical footprint and debug interface, while S9KEAZN64ACLH introduces architectural divergence requiring full firmware rewrite but delivers higher performance and modern toolchain support.

Availability

MC9S08AC48CFGE is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart actuator controllers, and medical infusion pump motor drivers requiring stable component supply across extended product lifecycles.

Supply support for MC9S08AC48CFGE 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

Freescale Semiconductor (now part of NXP Semiconductors) designed high-reliability microcontrollers for automotive, industrial, and consumer applications with emphasis on robustness, low-power operation, and integrated analog peripherals.

The MC9S08ACxx series targets cost-sensitive, functionally safe embedded systems requiring LIN communication, precise analog measurement, and long-term supply stability - especially in automotive body control and industrial automation.

FAQ

What is the maximum CPU frequency supported by the MC9S08AC48CFGE?

The MC9S08AC48CFGE supports a maximum CPU frequency of 40 MHz, with a corresponding 20 MHz internal bus frequency. This timing is achieved using the internal clock generator with NVM-trimmed RC oscillator or external crystal source. The 40-MHz capability enables real-time response in LIN communication stacks and fast ADC sampling loops without external acceleration.

Does the MC9S08AC48CFGE support LIN 2.0 protocol natively?

Yes, the MC9S08AC48CFGE supports LIN 2.0 natively through its dual SCI modules, which include master extended break generation and slave extended break detection. These features comply with SAE J2602 requirements and enable seamless integration into automotive body networks without external protocol translators or timing-critical software bit-banging.

What package type and dimensions does the MC9S08AC48CFGE use?

The MC9S08AC48CFGE uses a 48-pin QFN package (case outline 98ASA00466D), measuring 7 mm × 7 mm with 0.5 mm pitch and an exposed thermal pad. This copper-wire bonded package replaces earlier gold-wire variants and is optimized for automated reflow assembly and thermal dissipation in compact automotive and industrial PCB layouts.

How much FLASH and RAM memory does the MC9S08AC48CFGE include?

The MC9S08AC48CFGE includes 48 KB of on-chip FLASH memory with block protection and security options, plus 1 KB of on-chip RAM. This memory configuration supports typical firmware images for LIN slave nodes, sensor fusion algorithms, and safety-monitoring routines while leaving space for field-upgradable parameters and calibration data storage.

Is the MC9S08AC48CFGE pin-compatible with other members of the MC9S08ACxx family?

Yes, the MC9S08AC48CFGE shares identical pinout and package (QFN-48) with MC9S08AC60CFGE and MC9S08AC32CFGE, enabling hardware reuse across memory variants. Firmware porting requires only FLASH size adjustment and linker script updates - no PCB redesign or signal routing changes are needed when scaling memory capacity within this family.