NXP Semiconductors MC908GZ32MFAE

Overview

MC908GZ32MFAE from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller with 32 KB Flash, 1 KB RAM, and integrated LIN-capable ESCI, MSCAN08, ADC, and PLL-based clock generation. It operates at up to 40 MHz core frequency, supports 5 V operation, and targets automotive body electronics and industrial control where robust serial communication and low-power operation are required.

For engineers reviewing the MC908GZ32MFAE datasheet, MC908GZ32MFAE pinout, MC908GZ32MFAE application, or MC908GZ32MFAE equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in LIN bus nodes and sensor interfaces, and two confirmed alternative parts with documented functional and packaging differences.

Technical Context

The MC908GZ32MFAE implements the HCS08 CPU core with enhanced addressing modes and a 16-bit index register. Its Clock Generator Module (CGM) integrates a crystal oscillator, PLL with programmable multiplier (×1–×32), and automatic acquisition/lock logic - enabling stable 40 MHz system clocks from low-cost 3.6864 MHz or 4 MHz crystals.

It features dual Flash blocks (FLASH-1 and FLASH-2) supporting independent erase/program operations, a 10-bit 24-channel ADC with configurable sample time and result justification, and an Enhanced Serial Communications Interface (ESCI) compliant with LIN 2.0 physical layer requirements including break detection and sync field handling.

Key Specifications

Pinout & Package

MC908GZ32MFAE is housed in a 64-pin QFP (Quad Flat Package) with 0.5 mm pitch, measuring 10 mm × 10 mm. The package provides full I/O access for multi-port peripheral routing and thermal performance suitable for convection-cooled automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC908GZ32MFAE, MC9S08DZ32 offers EEPROM and faster ADC at the cost of pinout revalidation, while S9KEAZ32AMLC delivers ARM-class compute and richer peripherals but demands full software and layout redesign - making MC908GZ32MFAE optimal for cost-sensitive, legacy-compatible LIN/CAN edge nodes.

Availability

MC908GZ32MFAE is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, and LIN sensor interface applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for MC908GZ32MFAE 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 specializing in automotive, industrial, and IoT solutions, with deep heritage in microcontrollers dating back to Motorola and Freescale.

The MC908GZ32MFAE belongs to the HCS08 family, designed specifically for cost-optimized automotive body electronics and industrial control applications demanding integrated LIN, CAN, and high-precision analog interfaces.

FAQ

What is the maximum operating frequency of the MC908GZ32MFAE?

The MC908GZ32MFAE achieves a maximum bus clock frequency of 40 MHz using its integrated PLL. This is typically derived from a 4 MHz crystal multiplied by 8 (or 3.6864 MHz ×10.85 for exact LIN 19.2 kbps). The HCS08 core executes instructions at half the bus clock, yielding up to 20 MIPS performance - sufficient for real-time LIN messaging and ADC processing in automotive nodes.

Does the MC908GZ32MFAE include a hardware LIN transceiver?

No, the MC908GZ32MFAE does not integrate a LIN transceiver. It includes the ESCI module, which implements the LIN protocol stack (break detection, sync, PID, checksum) and drives the LIN bus line directly in open-drain mode. An external LIN transceiver (e.g., TJA1020) is required for bus-level voltage translation and fault protection - a standard architecture for all HCS08 LIN-capable MCUs.

How is Flash memory organized in the MC908GZ32MFAE?

The MC908GZ32MFAE contains 32 KB of on-chip Flash divided into two independent blocks: FLASH-1 (24 KB) and FLASH-2 (8 KB). Each block has dedicated control and protection registers, enabling separate erase/program operations and block-level write protection - commonly used to isolate application code (FLASH-1) from bootloader or calibration data (FLASH-2).

What ADC features does the MC908GZ32MFAE support?

The MC908GZ32MFAE integrates a 10-bit successive-approximation ADC with 24 input channels (AD0–AD23), programmable sample time, left/right-justified result formatting, and hardware-triggered scan mode. It supports single-ended and differential inputs, and its dedicated VDDA/VSSA power domain ensures <±2 LSB integral nonlinearity across the −40 °C to +125 °C range - validated in Freescale's automotive qualification testing.

Is the MC908GZ32MFAE pin-compatible with other GZ-series MCUs like MC68HC908GZ60?

No, the MC908GZ32MFAE is not pin-compatible with MC68HC908GZ60 or MC68HC908GZ48. While all three share the same 64-pin QFP package and core peripheral set, pin mappings differ significantly - especially for ADC inputs, CAN signals, and port multiplexing. The MC908GZ32MFAE datasheet Appendix B explicitly documents its unique pin assignment table, confirming no mechanical or electrical interchangeability without PCB redesign.