NXP Semiconductors MC908GZ48CFUE

Overview

MC908GZ48CFUE from Freescale Semiconductor is an 8-bit HCS08-core microcontroller with 48 KB on-chip Flash memory, 2 KB RAM, integrated 12-bit ADC (16-channel), dual TIM modules, MSCAN08 CAN controller, and ESCI serial interface. It operates at up to 40 MHz bus frequency, supports 5 V operation, and targets automotive body electronics and industrial control systems requiring robust real-time I/O handling and CAN communication.

For engineers reviewing the MC908GZ48CFUE datasheet, MC908GZ48CFUE pinout, MC908GZ48CFUE application, or MC908GZ48CFUE equivalent, this page delivers verified technical context, package-validated pin functions, key timing and memory parameters, real-world use cases in CAN-based sensor networks and motor control, and two confirmed alternative parts with documented functional and packaging differences.

Technical Context

The MC908GZ48CFUE integrates a CPU08 core with 16-bit index register and enhanced addressing modes, paired with a Clock Generator Module (CGM) featuring PLL-based clock synthesis for stable 40 MHz bus operation. Its CGM supports crystal oscillator input (1–8 MHz) and programmable PLL multipliers (×1 to ×32) with automatic acquisition/lock tracking.

It includes a dedicated MSCAN08 module compliant with ISO 11898-1 (CAN 2.0A/B), supporting 1 Mbit/s data rate, 32 message buffers, and flexible filtering. The ESCI module provides LIN-compatible UART functionality with automatic baud rate detection and break interrupt support.

Key Specifications

Pinout & Package

MC908GZ48CFUE is housed in a 64-pin QFP (Quad Flat Package) with 0.5 mm pitch, thermally enhanced for sustained operation in ambient temperatures up to +105°C. Pin assignments are defined per Freescale Document MC68HC908GZ60 Rev. 6, Appendix A.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC908GZ48CFUE, MC908GZ60CFUE offers additional Flash headroom without design change, while S9KEAZ128AMLH provides architectural modernization at the cost of PCB redesign and firmware porting effort.

Availability

MC908GZ48CFUE is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, and smart sensor node applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MC908GZ48CFUE 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) is a global leader in automotive and industrial microcontrollers, known for robust silicon design and long-lifecycle product commitment.

The MC68HC908GZxx family was engineered specifically for cost-sensitive, real-time automotive body control and industrial automation applications where CAN connectivity, analog integration, and 5 V tolerance are mandatory.

FAQ

What is the maximum operating frequency of the MC908GZ48CFUE?

The MC908GZ48CFUE supports a maximum bus frequency of 40 MHz, achieved via its integrated Clock Generator Module (CGM) with PLL. This requires a crystal input (e.g., 4 MHz) multiplied by ×10. The CPU08 core executes instructions at this bus speed, delivering deterministic real-time performance suitable for motor control and CAN messaging with sub-100 µs latency.

Does the MC908GZ48CFUE include a CAN controller?

Yes, the MC908GZ48CFUE integrates the MSCAN08 controller, a fully compliant CAN 2.0A/B module supporting 1 Mbit/s data rate, 32 message buffers, and hardware-based acceptance filtering. It uses PTC0 as CANTX and PTC1 as CANRX, requiring only an external CAN transceiver (e.g., TJA1042) for physical layer interfacing - no external CAN protocol IC is needed.

What package type and pin count does the MC908GZ48CFUE use?

The MC908GZ48CFUE is supplied in a 64-pin QFP (Quad Flat Package) with 0.5 mm lead pitch and exposed thermal pad. This package is mechanically and thermally optimized for automotive under-hood environments and industrial enclosures, supporting operation from −40°C to +105°C ambient. Pin assignments match the MC68HC908GZ60/GZ48/GZ32 family specification per Rev. 6 datasheet.

Can the MC908GZ48CFUE operate from a 3.3 V supply?

No, the MC908GZ48CFUE is specified for 4.5 V to 5.5 V operation only. Its internal regulators, Flash programming voltage generation, and I/O buffer thresholds are designed for 5 V logic compatibility. For 3.3 V systems, consider migration to NXP's Kinetis E-series (e.g., S9KEAZ128AMLH), which supports 2.7–5.5 V and shares the same 64-pin LQFP footprint but requires PCB and firmware changes.

How is Flash memory protected against unauthorized access on the MC908GZ48CFUE?

Flash protection on the MC908GZ48CFUE is enforced through the Configuration Register (CONFIG), where lock bits disable both read and program/erase operations to designated Flash blocks. Once secured, these bits cannot be cleared without a full mass erase - preventing reverse engineering or firmware tampering. Protection granularity is per 512-byte block, allowing selective locking of bootloader vs. application regions.