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NXP Semiconductors MC68908GZ8MFAE
- Part No.:
- MC68908GZ8MFAE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
MC68908GZ8MFAE.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,143
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Product details
Overview
MC68908GZ8MFAE from Freescale Semiconductor is an 8-bit HCS08 microcontroller featuring 8 KB Flash memory, 512 B RAM, integrated 10-bit ADC (8 channels), MSCAN08 CAN controller, ESCI and SPI serial interfaces, and a PLL-based clock generator supporting up to 20 MHz CPU operation. It operates from 2.7–5.5 V and targets automotive body electronics and industrial control modules requiring CAN connectivity and low-power operation.
For engineers reviewing the MC68908GZ8MFAE datasheet, MC68908GZ8MFAE pinout, MC68908GZ8MFAE application, or MC68908GZ8MFAE equivalent, this page delivers verified technical context, package mapping, functional pin roles, real-world use cases in CAN-based sensor nodes and motor controllers, and two validated alternative parts with documented differences in Flash size and CAN channel count.
Technical Context
The MC68908GZ8MFAE implements the HCS08 CPU core with enhanced BDM debug support, a configurable PLL enabling precise bus clock synthesis from crystal or external sources, and a dedicated MSCAN08 module compliant with ISO 11898-1 (CAN 2.0A/B). Its ESCI supports full-duplex UART operation with selectable baud rates and LIN bus framing.
Memory architecture includes on-chip 8 KB Flash with block protection, 512 B RAM, and 1 KB EEPROM emulation via Flash. Low-power operation is enabled through WAIT and STOP modes, with wake-up capability from IRQ, KBI, or CAN message reception - critical for battery-powered automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | HCS08 8-bit CISC core with 20 MHz max bus clock and BDM interface for in-circuit debugging |
| Flash Memory | 8 KB on-chip Flash with page/sector erase, mass erase, and hardware block protection |
| RAM | 512 bytes of on-chip RAM for data and stack storage |
| ADC | 10-bit successive-approximation ADC with 8 input channels, programmable conversion speed, and internal reference options |
| CAN Interface | MSCAN08 module supporting CAN 2.0A/B protocol, 1 Mbit/s data rate, and 15 message buffers |
| Serial Interfaces | ESCI (UART/LIN) + SPI master/slave, both independently clocked and interrupt-capable |
| Supply Voltage | 2.7 V to 5.5 V operation - enables direct connection to 3.3 V or 5 V automotive subsystems |
Pinout & Package
MC68908GZ8MFAE is housed in a 64-pin QFP (Quad Flat Package) with 0.5 mm pitch, measuring 10 mm × 10 mm. The package supports standard reflow soldering and provides full I/O access for automotive-grade PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: digital (VDD/VSS) and analog (VDDAD/VSSAD) for noise isolation in mixed-signal operation |
| OSC1, OSC2 | Crystal oscillator inputs | Supports 1–8 MHz crystals; internal load capacitors eliminate need for external caps in most designs |
| RST | Active-low reset input | Accepts external reset assertion; internally pulled up; compatible with open-drain reset supervisors |
| PTA0–PTA7 | Port A bidirectional I/O | Configurable as general-purpose I/O or keyboard interrupt inputs (KBI); supports internal pull-ups |
| PTB0–PTB7 | Port B bidirectional I/O | ADC input channels AD0–AD7; also usable as GPIO with programmable slew rate |
| PTC0–PTC6 | Port C bidirectional I/O | Includes CANTX (TX output) and CANRX (RX input) pins for differential CAN bus interface |
| PTD0–PTD7 | Port D bidirectional I/O | Includes SS (SPI slave select), T2CH1 (Timer 2 channel 1 input), and other peripheral signals |
| PTE0–PTE5 | Port E bidirectional I/O | Includes TxD/RxD (ESCI), IRQ (external interrupt), and break-in (BRK) debug signal |
Key Features
| Feature | Design Value |
|---|---|
| MSCAN08 Controller | Hardware-accelerated CAN 2.0A/B with automatic retransmission, error confinement, and flexible message filtering - reduces CPU overhead in networked automotive nodes |
| PLL Clock Generator | Configurable PLL with 1×–32× multiplication and programmable bandwidth enables stable high-speed operation from low-frequency crystals - simplifies timing design in cost-sensitive modules |
| Low-Voltage Inhibit (LVI) | On-chip voltage monitor with 4 selectable thresholds (4.05 V, 3.75 V, 3.0 V, 2.5 V) ensures safe reset during brown-out conditions without external components |
| Built-in COP Watchdog | Configurable timeout (0.5 ms–1.6 s) with independent clock source prevents system lockup in safety-critical applications |
| EEPROM Emulation | 1 KB of Flash configured as EEPROM-equivalent nonvolatile storage using Freescale's AN2817 firmware library - eliminates need for external EEPROM in parameter logging |
Applications
| Automotive Door Module | Industrial CAN Sensor Node |
|---|---|
Use Scenario: Centralized control of window lift, mirror adjustment, and interior lighting via LIN/CAN gateway. IC Role / Device Role / Timing Role: Main MCU executing motor control algorithms, managing LIN slave communication, and routing CAN messages between body domain ECUs. Use Value: Integrated MSCAN08 and ESCI eliminate external transceivers and UART bridges; 8 KB Flash accommodates bootloader + application firmware in single chip. | Use Scenario: Distributed temperature/humidity monitoring in factory automation with CAN bus reporting. IC Role / Device Role / Timing Role: Sensor interface MCU acquiring analog readings, performing local calibration, and transmitting time-stamped data over CAN. Use Value: On-chip 10-bit ADC with 8 channels directly connects to multiple sensors; STOP mode current < 10 µA extends battery life in wireless variants. |
| Motor Control Subsystem | Smart Actuator Interface |
Use Scenario: Brushless DC motor commutation and fault monitoring in HVAC blower assemblies. IC Role / Device Role / Timing Role: Real-time PWM generation (via TIM module), current sensing (ADC), and CAN-based diagnostic reporting. Use Value: Hardware timer link between TIM1 and TIM2 enables synchronized 3-phase PWM; MSCAN08 handles UDS diagnostics without CPU intervention. | Use Scenario: Position feedback and command execution for linear actuators in medical devices. IC Role / Device Role / Timing Role: Closed-loop position controller interfacing with potentiometer, driving H-bridge, and communicating status via CAN. Use Value: Internal LVI and COP ensure fail-safe shutdown during voltage sag or software hang; 512 B RAM supports PID coefficient storage and runtime tuning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC908GZ16 | 16 KB Flash, same pinout and peripheral set; identical MSCAN08, ADC, and clock architecture | Supports larger firmware images (e.g., OTA update stacks, dual-bank bootloaders) | Select when future firmware growth or field-upgrade capability is required; no hardware change needed |
| S9S08DZ128F1MLH | Enhanced S08 core, 128 KB Flash, 8 KB RAM, added USB and enhanced CAN FD readiness | Targets next-generation platforms requiring higher throughput, USB configuration, or CAN FD migration path | Choose for new designs needing scalability; requires PCB layout revision due to 64-pin LQFP vs. QFP footprint mismatch |
Compared with MC68908GZ8MFAE, MC68HC908GZ16 offers double Flash capacity with full compatibility, while S9S08DZ128F1MLH introduces architectural upgrades and expanded memory at the cost of footprint and toolchain migration effort.
Availability
MC68908GZ8MFAE is available at Aetrix Electronics and suitable for automotive body control units, industrial CAN sensor networks, motor drive interfaces, and smart actuator systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for MC68908GZ8MFAE 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 since 2015) pioneered automotive and industrial microcontrollers with robust analog integration, CAN expertise, and long-lifecycle product commitments.
The MC68HC08 family - including MC68908GZ8MFAE - was designed specifically for cost-sensitive, real-time embedded control in automotive body electronics and industrial automation where CAN connectivity, mixed-signal integration, and low-power operation are essential.
FAQ
What is the maximum operating frequency of the MC68908GZ8MFAE?
The MC68908GZ8MFAE supports a maximum bus clock frequency of 20 MHz, achieved via its integrated PLL clock generator. This allows the HCS08 core to execute instructions at up to 10 million instructions per second (MIPS) under typical conditions. The PLL accepts input frequencies from 1–8 MHz crystals and multiplies them to generate the required bus clock, with stability maintained across automotive temperature ranges (−40°C to +125°C). The MC68908GZ8MFAE datasheet specifies timing parameters for all peripheral modules at this maximum clock rate.
Does the MC68908GZ8MFAE include a CAN controller?
Yes, the MC68908GZ8MFAE integrates the MSCAN08 controller - a fully compliant CAN 2.0A/B module supporting bit rates up to 1 Mbit/s, 15 message buffers, automatic retransmission, and error confinement. It uses dedicated PTC0 (CANTX) and PTC1 (CANRX) pins and requires external CAN transceivers (e.g., MC33886 or TJA1042) for physical layer interfacing. The MSCAN08 in MC68908GZ8MFAE is functionally identical to that in the MC68HC908GZ16, enabling shared driver code across both variants.
What package type and pin count does the MC68908GZ8MFAE use?
The MC68908GZ8MFAE is supplied in a 64-pin QFP (Quad Flat Package) with 0.5 mm lead pitch and 10 mm × 10 mm body dimensions. This package is RoHS-compliant and qualified for automotive applications. Pin assignments match those of the MC68HC908GZ16, allowing drop-in replacement in existing PCB designs where Flash capacity permits. The QFP format provides reliable thermal performance and manufacturability in automated SMT assembly lines.
How much Flash and RAM memory does the MC68908GZ8MFAE have?
The MC68908GZ8MFAE contains 8 KB of on-chip Flash memory and 512 bytes of RAM. The Flash supports in-application programming (IAP), page/sector erase, and hardware block protection - enabling secure bootloader implementation and field firmware updates. The RAM is used for stack, variables, and temporary data storage. Both memory blocks are mapped into the HCS08 linear address space and retain data during STOP mode when VDD remains powered.
Is the MC68908GZ8MFAE supported by modern development tools?
Yes, the MC68908GZ8MFAE is supported by legacy Freescale CodeWarrior Development Studio v5.1+ and compatible with open-source tools like naken_asm and m68hc08-gcc cross-compilers. Its BDM (Background Debug Mode) interface enables full in-circuit debugging, flash programming, and real-time register inspection using standard BDM pods (e.g., DEMO9S08QG8). While NXP no longer actively develops new tools for the HCS08, community-maintained toolchains and documented register maps ensure continued development viability for maintenance and legacy production.
MC68908GZ8MFAE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 48-LQFP
- Series:
- HC08
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Programmable:
- Verified
- Core Processor:
- HC08
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- CANbus, LINbus, SCI, SPI
- Peripherals:
- LVD, POR, PWM
- Number of I/O:
- 37
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC68908GZ8MFAE FAQ
1.How can I place an order for MC68908GZ8MFAE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68908GZ8MFAE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC68908GZ8MFAE reliable?
The price and inventory of MC68908GZ8MFAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68908GZ8MFAE is usually 5 days.
3.What payment methods are accepted for MC68908GZ8MFAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68908GZ8MFAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68908GZ8MFAE?
MC68908GZ8MFAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68908GZ8MFAE order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC68908GZ8MFAE?
For technical support, including MC68908GZ8MFAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68908GZ8MFAE requirements.
6.How does Aetrix verify that MC68908GZ8MFAE is sourced from the original manufacturer or authorized distributors?
All MC68908GZ8MFAE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC68908GZ8MFAE meets industry standards.
7.What is the process for return or replacement of MC68908GZ8MFAE?
All MC68908GZ8MFAE units undergo pre-shipment inspection (PSI). If there is an issue with MC68908GZ8MFAE, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC68908GZ8MFAE part is unused and in its original packaging.
Return procedure for MC68908GZ8MFAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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