NXP Semiconductors MC908AZ32AVFUE

Overview

MC908AZ32AVFUE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller featuring 32 KB on-chip Flash memory, 1.5 KB RAM, and integrated CAN 2.0A/B controller. It operates at up to 40 MHz bus frequency with internal PLL clock generation, supports 15-channel 10-bit ADC, and includes SCI, SPI, two timer modules (TIMA/TIMB), COP watchdog, and LVI voltage monitoring - deployed in automotive body control modules and industrial sensor nodes.

For engineers reviewing the MC908AZ32AVFUE datasheet, MC908AZ32AVFUE pinout, MC908AZ32AVFUE application, or MC908AZ32AVFUE equivalent, key selection criteria include CAN interface compliance, Flash endurance (100k erase/write cycles), 5V-tolerant I/O capability, and qualification for extended temperature operation (–40°C to +125°C).

Technical Context

The MC908AZ32AVFUE implements the HCS08 CPU core with enhanced BDM debug support and a System Integration Module (SIM) managing reset, interrupt prioritization, and low-power modes (WAIT/STOP). Its Clock Generator Module (CGM) integrates a crystal oscillator, PLL, and base clock selector to deliver stable system clocks from 1–40 MHz.

Peripheral integration includes MSCAN08 controller with full CAN 2.0A/B protocol handling, dual 16-bit timer modules with input capture/output compare, and a programmable interrupt timer (PIT). The ADC-15 module supports single-ended/differential conversions with configurable sample time and trigger sources.

Key Specifications

Pinout & Package

MC908AZ32AVFUE is housed in a 64-pin QFP (Quad Flat Package) with 0.5 mm pitch and exposed thermal pad. Pin functions are defined per Chapter 1.4 of the Rev. 2 datasheet and validated for automotive signal integrity and ESD robustness.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC908AZ32AVFUE, the S9KEAZ32AMLCR offers modern ARM architecture and expanded peripherals but demands firmware redesign, while the MC9S08DZ32F2MLC provides mechanical and electrical compatibility with reduced nonvolatile memory flexibility.

Availability

MC908AZ32AVFUE is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, smart battery management, and heavy-duty vehicle instrumentation requiring stable component supply across extended temperature and long product lifecycles.

Supply support for MC908AZ32AVFUE 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 automotive, industrial, IoT, and communication infrastructure solutions, with deep heritage in microcontroller innovation through its acquisition of Freescale.

The MC908AZ32AVFUE belongs to the HCS08 family designed specifically for cost-sensitive, high-reliability automotive sub-systems requiring CAN connectivity, analog sensing, and robust operation in harsh environments.

FAQ

What is the maximum bus frequency supported by the MC908AZ32AVFUE?

The MC908AZ32AVFUE supports a maximum bus frequency of 40 MHz, achieved via its internal Phase-Locked Loop (PLL) clock generator. This frequency is derived from an external crystal (1–8 MHz) or internal oscillator, and is confirmed in Section 8.3.2 of the Rev. 2 datasheet. The PLL allows flexible clock scaling while maintaining stability across voltage and temperature variations - essential for deterministic timing in CAN message transmission and ADC sampling within the MC908AZ32AVFUE.

Does the MC908AZ32AVFUE include EEPROM memory?

No, the MC908AZ32AVFUE does not integrate EEPROM. It relies on its 32 KB Flash memory for nonvolatile data storage, with dedicated Flash block protection and programming routines defined in Chapter 4. While Flash endurance is rated at 100,000 erase/write cycles, it lacks the byte-level write capability and unlimited endurance typical of EEPROM - making it unsuitable for high-frequency parameter logging without wear-leveling firmware. This design choice reflects the MC908AZ32AVFUE's focus on program storage over frequent data updates.

What CAN protocol versions does the MC908AZ32AVFUE support?

The MC908AZ32AVFUE implements the MSCAN08 controller supporting both CAN 2.0A (standard 11-bit identifier) and CAN 2.0B (extended 29-bit identifier) protocols, as documented in Chapter 24 of the datasheet. It operates at bit rates up to 1 Mbit/s and includes 16 message buffers with programmable acceptance filtering, priority arbitration, and automatic retransmission on error. This dual-mode support enables interoperability with legacy and modern automotive networks without external protocol translation - a core capability of the MC908AZ32AVFUE.

Is the MC908AZ32AVFUE qualified for automotive use?

Yes, the MC908AZ32AVFUE is qualified to AEC-Q100 Grade 1 standards, specifying operation from –40°C to +125°C ambient temperature and rigorous stress testing for automotive applications. Its design includes features critical for vehicle environments: 5V-tolerant I/O pins, LVI circuitry with hysteresis, COP watchdog, and CAN physical layer compatibility. These qualifications are explicitly stated in the Ordering Information section (Chapter 1.5) and Electrical Specifications (Chapter 25) of the MC908AZ32AVFUE datasheet.

How many ADC channels does the MC908AZ32AVFUE provide?

The MC908AZ32AVFUE provides 15 analog input channels for its 10-bit ADC-15 module: 14 dedicated channels (ATD0–ATD13) plus ATD8 multiplexed on PTD0, as detailed in Chapter 21. Channel selection, sample time, and conversion triggers (software, timer, or external) are fully configurable. Hardware averaging across up to 16 samples reduces noise in precision sensing applications - a key differentiator of the MC908AZ32AVFUE compared to basic 8-bit MCUs.