NXP Semiconductors MC68HC908GZ60CFJ

Overview

MC68HC908GZ60CFJ from NXP (formerly Freescale) is an 8-bit HCS08-core microcontroller with 60 KB on-chip Flash, 2 KB RAM, and integrated MSCAN08 CAN controller. It operates at up to 20 MHz bus frequency, supports LIN via ESCI, and includes 10-bit ADC with 24 input channels - used in automotive body control modules requiring robust serial communication and analog sensing.

For engineers reviewing the MC68HC908GZ60CFJ datasheet, MC68HC908GZ60CFJ pinout, MC68HC908GZ60CFJ application, or MC68HC908GZ60CFJ equivalent, key selection criteria include CAN 2.0A/B compliance, Flash endurance (100k erase/write cycles), low-voltage inhibit (VTRIPR = 4.25 V min), and support for stop/wait low-power modes with wake-on-CAN/IRQ/KBI.

Technical Context

The MC68HC908GZ60CFJ integrates a CPU08 core with 16-bit index register and enhanced addressing modes, paired with a Clock Generator Module featuring PLL-based clock synthesis (1–20 MHz BUSCLK), crystal oscillator, and configurable acquisition/lock timing. Its memory subsystem includes two independent Flash blocks (FLASH-1 and FLASH-2) with separate block protection registers and mass/page erase capability.

Peripheral integration includes MSCAN08 (CAN 2.0A/B compliant with 32 message objects), ESCI supporting LIN 1.3/2.0 master/slave, dual 16-bit TIM modules with channel linking, and a 10-bit ADC with programmable sample time, multiple justification modes, and hardware-triggered conversions synchronized to TIM or ESCI events.

Key Specifications

Pinout & Package

MC68HC908GZ60CFJ is housed in a 64-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined across seven I/O ports (Port A–G), including dedicated CAN TX/RX, ESCI TX/RX, ADC inputs, and keyboard interrupt lines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC68HC908GZ60CFJ, S9S08DZ60F1MLH offers higher ESD tolerance and updated qualification, while MC9S08DZ60CLH adds RAM headroom - both retain identical peripheral functionality and CAN/LIN timing behavior, enabling incremental design evolution without architectural redesign.

Availability

MC68HC908GZ60CFJ is available at Aetrix Electronics and suitable for automotive body electronics, seat control systems, and roof module designs requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant microcontrollers.

Supply support for MC68HC908GZ60CFJ 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, with deep heritage in microcontroller innovation dating back to Motorola's 6800 family.

The MC68HC908GZ60CFJ belongs to the HCS08 microcontroller family, designed specifically for cost-sensitive, high-reliability automotive sub-systems requiring integrated CAN, LIN, and analog signal acquisition in a single chip.

FAQ

What is the maximum bus frequency supported by the MC68HC908GZ60CFJ?

The MC68HC908GZ60CFJ supports a maximum bus frequency of 20 MHz, achieved via its integrated Clock Generator Module (CGM) with PLL-based clock synthesis. This frequency is derived from an external crystal (1–8 MHz) multiplied internally, and it governs instruction execution speed, peripheral timing, and CAN bit rate accuracy. The MC68HC908GZ60CFJ datasheet specifies timing parameters - including Flash access wait states and ADC conversion time - explicitly at this 20 MHz operating point.

Does the MC68HC908GZ60CFJ include hardware CAN support?

Yes, the MC68HC908GZ60CFJ integrates the MSCAN08 controller, which is fully compliant with ISO 11898-1 (CAN 2.0A/B). It features 32 message buffers, programmable bit timing, acceptance filtering, and automatic retransmission. Unlike software-emulated CAN, MSCAN08 offloads frame assembly, CRC calculation, and error handling from the CPU - confirmed in Chapter 12 of the MC68HC908GZ60CFJ datasheet and validated in Freescale application note AN2894.

How many ADC input channels does the MC68HC908GZ60CFJ provide?

The MC68HC908GZ60CFJ provides 24 dedicated ADC input channels (AD0 through AD23), mapped across Port A (AD8–AD15), Port B (AD0–AD7), and Port G (AD16–AD23). All channels support 10-bit resolution with selectable left/right justification and hardware averaging. Chapter 3 of the MC68HC908GZ60CFJ datasheet confirms this count and specifies that up to 16 channels may be scanned in sequence using the ADC's auto-scan mode.

What low-power modes are available on the MC68HC908GZ60CFJ?

The MC68HC908GZ60CFJ supports three low-power modes: Wait, Stop, and a variant of Stop with partial peripheral clock gating. In Stop mode, current consumption drops to 1.5 µA (typical), and wake-up is supported via IRQ, KBI, CAN activity, or RTC alarm. Chapter 10 of the MC68HC908GZ60CFJ datasheet details entry/exit sequences and peripheral retention behavior - confirming that MSCAN08 remains active in Stop mode to detect dominant bits on the bus.

Is the MC68HC908GZ60CFJ pin-compatible with other members of the GZ family?

No, the MC68HC908GZ60CFJ is not fully pin-compatible with MC68HC908GZ48 or MC68HC908GZ32. While all share the same 64-pin LQFP package and core peripheral mapping, pin functions differ - notably Port F and Port G assignments vary between variants to accommodate differing Flash/RAM configurations and peripheral enablement. Table 1-2 and Section 1.4 of the MC68HC908GZ60CFJ datasheet explicitly list unique pinouts per device, confirming non-interchangeability without PCB revision.