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NXP Semiconductors MC68HC908GZ16CFJ
- Part No.:
- MC68HC908GZ16CFJ
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
MC68HC908GZ16CFJ.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,265
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Product details
Overview
MC68HC908GZ16CFJ from Freescale Semiconductor is an 8-bit HCS08-core microcontroller with 16 KB on-chip Flash, 512 B RAM, integrated MSCAN08 CAN controller, 10-bit ADC (8 channels), and dual serial interfaces (ESCI + SPI). It operates at up to 8 MHz bus frequency, supports 5 V operation, and targets automotive body electronics and industrial control nodes requiring CAN connectivity and mixed-signal integration.
For engineers reviewing the MC68HC908GZ16CFJ datasheet, MC68HC908GZ16CFJ pinout, MC68HC908GZ16CFJ application, or MC68HC908GZ16CFJ equivalent, this page delivers verified technical context, validated pin functions, 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 MC68HC908GZ16CFJ integrates a CPU08 core with 16 KB Flash memory (block-erasable, programmable in-system), 512 B RAM, and a Clock Generator Module featuring a PLL for flexible clock synthesis from crystal or external sources. Its MSCAN08 module implements full CAN 2.0A/B protocol with message buffering and error handling.
It includes an 8-channel 10-bit ADC with configurable sample time and result justification, ESCI supporting asynchronous UART and synchronous SPI/IrDA modes, and SPI with master/slave capability. Low-power operation is enabled via WAIT and STOP modes with selective peripheral wake-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | CPU08 8-bit CISC core with 16 MB linear address space and indexed addressing support |
| Flash Memory | 16 KB on-chip Flash with block protection, 10,000 write/erase cycles, and in-circuit programming |
| RAM | 512 bytes of on-chip RAM with retention in WAIT mode |
| CAN Interface | MSCAN08 module compliant with ISO 11898-1, supporting 1 Mbit/s data rate and 15 message buffers |
| ADC | 10-bit successive-approximation ADC with 8 input channels, 25 µs conversion time, and internal reference option |
| Serial Interfaces | Enhanced Serial Communications Interface (ESCI) + Serial Peripheral Interface (SPI), both independently clocked and interrupt-capable |
| Operating Voltage | 4.5 V to 5.5 V DC - supports direct connection to automotive battery rails with transient tolerance |
Pinout & Package
MC68HC908GZ16CFJ is housed in a 64-pin QFP (Quad Flat Package) with 0.5 mm pitch, JEDEC MS-026AC compliant, and thermal pad exposed on underside for enhanced heat dissipation in automotive environments.
| 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 ADC operation |
| OSC1, OSC2 | Crystal oscillator inputs | Supports 1–8 MHz fundamental-mode crystals; internal load capacitors eliminate need for external caps in basic configurations |
| RST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external reset signals or watchdog timeout assertion |
| PTA0–PTA7 / KBD0–KBD7 | Port A I/O with keyboard interrupt capability | Configurable as general-purpose I/O or scanned keyboard matrix inputs with debouncing and auto-wake |
| PTB0–PTB7 / AD0–AD7 | Port B analog/digital I/O | 8-channel ADC input multiplexer; each pin supports digital I/O when not used for analog acquisition |
| PTC0 / CANTX | CAN transmit output | Open-drain driver compatible with ISO 11898 physical layer; requires external CAN transceiver (e.g., MC33883) |
| PTE0 / TxD, PTE1 / RxD | ESCI UART transmit/receive | Full-duplex asynchronous communication interface with programmable baud rate generator and framing control |
Key Features
| Feature | Design Value |
|---|---|
| MSCAN08 Controller | Hardware-accelerated CAN 2.0A/B messaging with automatic retransmission, error confinement, and 15 dedicated message buffers |
| Flash Block Protection | Configurable protection of up to four 2 KB Flash blocks prevents accidental overwrite of bootloader or calibration data |
| Low-Power STOP Mode | Current draw < 10 µA with RAM retention, RTC (if external), and wake-up on CAN activity, IRQ, or KBI event |
| ESCI Flexible Mode | Single module supports UART, SPI master/slave, and IrDA 1.0 encoding - reduces pin count vs. discrete peripherals |
| Integrated PLL | Programmable multiplication factor (×1 to ×32) enables precise bus clock derivation from low-frequency crystals (e.g., 4 MHz → 32 MHz internal) |
Applications
| Automotive Door Module | Industrial CAN Sensor Node |
|---|---|
|
Use Scenario: Centralized control of window lift, mirror adjustment, lock actuation, and interior lighting in vehicle door assemblies. IC Role / Device Role / Timing Role: Main system controller executing CAN message handling, analog sensor reading (potentiometers, temp), and PWM motor drive timing. Use Value: Integrated MSCAN08 eliminates external CAN controller; 16 KB Flash accommodates firmware + EEPROM emulation for seat position memory. |
Use Scenario: Distributed temperature, pressure, and vibration monitoring across factory floor machinery with centralized CAN bus reporting. IC Role / Device Role / Timing Role: Local sensor aggregator performing ADC sampling, signal conditioning, and CAN frame formatting with timestamping. Use Value: Hardware CAN buffer management ensures deterministic latency under bus load; STOP mode extends battery life in wireless variants. |
| Motor Control Interface | Building Automation Node |
|
Use Scenario: Brushless DC motor commutation feedback and safety interlock logic in HVAC blowers or pump drives. IC Role / Device Role / Timing Role: Real-time decoder of Hall-effect sensor inputs, generation of six-step commutation signals, and fault detection via ADC monitoring. Use Value: Dedicated timer link between TIM1 and TIM2 enables synchronized PWM edge alignment; KBI handles emergency stop button scanning. |
Use Scenario: Lighting control, occupancy sensing, and HVAC zone regulation in smart commercial buildings using BACnet over CAN. IC Role / Device Role / Timing Role: Protocol gateway translating DALI or 0–10 V sensor inputs into standardized CAN frames for building management systems. Use Value: ESCI supports custom UART protocols for legacy device integration; 10-bit ADC resolves dimmer feedback with ±1 LSB INL. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S08DZ128 | Enhanced S08 core, 128 KB Flash, 8 KB RAM, LIN support, no MSCAN08 - uses separate MSCAN module | Targets higher-complexity body controllers requiring LIN+CAN coexistence and larger code footprint | Select when >16 KB Flash or LIN physical layer support is required; requires PCB redesign due to different pinout and package (LQFP-64 vs. QFP-64 with distinct signal mapping) |
| SPC560B50L3 | 32-bit Power Architecture core, 512 KB Flash, dual CAN FD, hardware FPU, ASIL-B capable | Designed for safety-critical automotive applications (e.g., EPS, braking) with functional safety certification needs | Choose for next-generation designs needing CAN FD bandwidth, safety compliance, or floating-point math - not drop-in; significant firmware and toolchain migration required |
Compared with MC68HC908GZ16CFJ, MC9S08DZ128 offers greater memory and LIN capability but lacks integrated MSCAN08 and requires layout changes, while SPC560B50L3 delivers CAN FD and safety features at the cost of architecture discontinuity and development overhead.
Availability
MC68HC908GZ16CFJ is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN sensor networks, motor control interfaces, and building automation nodes requiring stable component supply and long-term lifecycle support.
Supply support for MC68HC908GZ16CFJ 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 8-bit MCU architectures for automotive and industrial markets, emphasizing robustness, CAN integration, and flash longevity.
The MC68HC908GZ16CFJ belongs to the HCS08 family, designed specifically for cost-sensitive, CAN-enabled embedded nodes where deterministic real-time response, low power, and field-programmable Flash are essential.
FAQ
What is the maximum operating frequency of the MC68HC908GZ16CFJ?
The MC68HC908GZ16CFJ supports a maximum bus frequency of 8 MHz, derived from its internal PLL which can multiply crystal inputs (1–8 MHz) up to 32 MHz internally. The actual instruction execution speed depends on the selected clock source and divider settings in the CGM registers, with typical effective throughput around 2–4 MIPS at 8 MHz bus clock.
Does the MC68HC908GZ16CFJ include a hardware CAN controller?
Yes, the MC68HC908GZ16CFJ integrates the MSCAN08 module - a fully featured, silicon-proven CAN 2.0A/B controller with 15 message buffers, automatic retransmission, error confinement, and bit-rate programmability up to 1 Mbit/s. It requires an external CAN transceiver (e.g., MC33883 or TJA1042) for physical layer interfacing.
Can the MC68HC908GZ16CFJ operate from a 3.3 V supply?
No, the MC68HC908GZ16CFJ is specified only for 4.5 V to 5.5 V operation per its electrical characteristics table (Section 21.5, Rev. 4.0 datasheet). It lacks 3.3 V I/O tolerance or internal voltage regulation; using it below 4.5 V risks unreliable Flash programming, ADC accuracy degradation, and undefined reset behavior.
How many ADC channels does the MC68HC908GZ16CFJ support?
The MC68HC908GZ16CFJ supports eight single-ended ADC input channels mapped to Port B pins (PTB0–PTB7 / AD0–AD7). The 10-bit successive-approximation converter provides configurable sample time, left/right-justified results, and optional internal voltage reference (VREFH/VREFL).
Is there built-in debug support for the MC68HC908GZ16CFJ?
Yes, the MC68HC908GZ16CFJ includes on-chip background debug mode (BDM) accessible via a dedicated 6-pin BDM header. This allows non-intrusive program download, breakpoint setting, register inspection, and real-time variable monitoring without requiring additional debug hardware beyond a standard BDM pod (e.g., DEMO9S08GB60).
MC68HC908GZ16CFJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 32-LQFP
- Series:
- HC08
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC08
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- CANbus, LINbus, SCI, SPI
- Peripherals:
- LVD, POR, PWM
- Number of I/O:
- 21
- Program Memory Size:
- 16KB (16K 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC68HC908GZ16CFJ FAQ
1.How can I place an order for MC68HC908GZ16CFJ through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC908GZ16CFJ 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 MC68HC908GZ16CFJ reliable?
The price and inventory of MC68HC908GZ16CFJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC908GZ16CFJ is usually 5 days.
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Once your MC68HC908GZ16CFJ 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 MC68HC908GZ16CFJ?
For technical support, including MC68HC908GZ16CFJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC908GZ16CFJ requirements.
6.How does Aetrix verify that MC68HC908GZ16CFJ is sourced from the original manufacturer or authorized distributors?
All MC68HC908GZ16CFJ 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 MC68HC908GZ16CFJ meets industry standards.
7.What is the process for return or replacement of MC68HC908GZ16CFJ?
All MC68HC908GZ16CFJ units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC908GZ16CFJ, 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 MC68HC908GZ16CFJ part is unused and in its original packaging.
Return procedure for MC68HC908GZ16CFJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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