MC68HC908GZ8MFJ - 8MHz 8KB Flash HC08 MCU with CAN | NXP
部品番号: MC68HC908GZ8MFJ ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $5.4 | $5.40 |
| 10 | $4.95 | $49.50 |
| 100 | $4.4 | $440.00 |
| 500 | $3.85 | $1,925.00 |
| 1,000 | $3.3 | $3,300.00 |
MC68HC908GZ8MFJ 概要
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/Flash), data memory (RAM), and a set of peripheral blocks onto one silicon die. The HC08 core uses an enhanced instruction set derived from the earlier M68HC05, with a stack-based architecture, 16-bit index registers, and a linear 64KB address space. Compared with larger ARM Cortex-M0 parts, the HC08 trades raw throughput for predictable interrupt latency, very low peripheral complexity, and long-term toolchain familiarity, which is why the family remains in production for safety subsystems, body controllers, and simple sensor nodes.
Key features of the MC68HC908GZ8MFJ include 21 general-purpose I/O lines, an enhanced PWM module, low-voltage detection (LVD) with power-on reset (POR), Flash program memory security, an on-chip clock generator that supports 1MHz to 8MHz crystals, and 8KB of in-application programmable Flash with security lock. The MSCAN08 block implements the Bosch CAN 2.0B active protocol (dated September 1991), and the device is qualified for the temperature range and ESD/EMC margins typical of automotive underhood and body modules.
The part uses a 2.7V to 5.5V single-supply architecture with low-power STOP and WAIT modes, making it suitable for body-electronics modules that must wake from CAN traffic. The 32-LQFP package supports standard surface-mount assembly and offers easy access to all peripheral pins for entry-level developers using NXP's HC08 tool chain and the on-chip bootstrap ROM for Flash programming without high voltage.
Typical applications include CAN-based body controllers, instrument cluster slaves, HVAC flap/motor controllers, simple sensor interfaces, and LIN/CAN gateway nodes. The wide operating voltage and built-in LVD/POR simplify automotive 12V battery-direct designs.
Designers should ensure the IRQ pin has a proper pull-up, route the CANH/CANL differential pair with 120-ohm termination, and use the on-chip COP watchdog to recover from bus stalls. The 32-LQFP ground/power pinout requires at least one decoupling capacitor per VDD pair and a single bulk cap near the package.
This page consolidates NXP datasheet specifications, distributor inventory signals, drop-in compatible parts within the HC08 family, and practical design notes not bundled on the manufacturer's product folder.
ドロップイン代替品: MC68HC908GZ8MFJ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
MC68HC908GZ8CFA
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MC68HC908GZ8MFA
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MC68HC908GZ16MFJ
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MC68HC908GZ60MFJ
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MC68HC908GZ8JZ
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MC68HC908GZ8MFJ 最大定格＆電気的特性
| Core Processor | HC08 |
| Core Size | 8-Bit |
| Maximum Bus Frequency | 8 MHz |
| Program Memory Size | 8 KB (8K x 8) FLASH |
| Program Memory Type | FLASH |
| RAM Size | 1 KB (1K x 8) |
| EEPROM Size | None on-die |
| Number of I/O Pins | 21 |
| 電源電圧 | 2.7 V to 5.5 V |
| 動作温度 | -40 C to +125 C (automotive grade) |
| Connectivity | CANbus (MSCAN08, CAN 2.0B), LINbus, SCI, SPI |
| Peripherals | LVD, POR, PWM, COP Watchdog |
| Clock Source | Internal + external crystal (1 MHz to 8 MHz) |
| パッケージ | 32-LQFP (7 x 7 mm) |
| 実装タイプ | Surface Mount |
| MSLレベル | 3 (per JEDEC J-STD-020) |
| AEC-Q100 | Qualified (automotive grade) |
MC68HC908GZ8MFJ ピン構成
| ピン 1 | IRQ — External interrupt request input |
| ピン 2 | TCLK — Timer clock input (also PTA0/IOC0) |
| ピン 3 | PTA1 — General I/O / IOC1 |
| ピン 4 | PTA2 — General I/O / IOC2 |
| ピン 5 | PTA3 — General I/O / IOC3 |
| ピン 6 | PTA4 — General I/O / IOC4 |
| ピン 7 | PTA5 — General I/O / IOC5 |
| ピン 8 | VDDA — Analog supply voltage |
| ピン 9 | VSSA — Analog ground |
| ピン 10 | PTB0 — General I/O / PWM channel 0 |
| ピン 11 | PTB1 — General I/O / PWM channel 1 |
| ピン 12 | PTB2 — General I/O / PWM channel 2 |
| ピン 13 | PTB3 — General I/O / PWM channel 3 |
| ピン 14 | PTB4 — General I/O / PWM channel 5 |
| ピン 15 | PTB5 — General I/O / PWM channel 5 |
| ピン 16 | PTC0 — General I/O / CAN RX (MSCAN08) |
| ピン 17 | PTC1 — General I/O / CAN TX (MSCAN08) |
| ピン 18 | PTC2 — General I/O / SCI TXD |
| ピン 19 | PTC3 — General I/O / SCI RXD |
| ピン 20 | PTC4 — General I/O / SPI MOSI |
| ピン 21 | PTC5 — General I/O / SPI MISO |
| ピン 22 | PTC6 — General I/O / SPI SCK |
| ピン 23 | PTC7 — General I/O / SPI SS |
| ピン 24 | RST — Reset input (active low) |
| ピン 25 | OSC1 — Crystal oscillator input |
| ピン 26 | OSC2 — Crystal oscillator output |
| ピン 27 | VDD — Digital supply voltage |
| ピン 28 | VSS — Digital ground |
| ピン 29 | BKGD — Background debug mode pin |
| ピン 30 | PTD0 — General I/O / SCI TXD alt |
| ピン 31 | PTD1 — General I/O / SCI RXD alt |
| ピン 32 | VSS — Digital ground (second) |
主な用途
MC68HC908GZ8MFJ の用途: 7 件s: CAN-Based Automotive Body Controller, HVAC Flap and Blower Motor Controller, Instrument Cluster Slave Display, Industrial CAN Sensor Node, LIN/CAN Gateway Slave, Low-Cost Automotive Window/Lift Control Module, Battery-Management Slave Cell Monitor.
CAN-Based Automotive Body Controller
The MC68HC908GZ8MFJ's integrated MSCAN08 controller (CAN 2.0B, Bosch September 1991) plus 21 GPIO and PWM channels makes it well suited for body-control modules such as door-lock, lighting, and mirror controllers. The 8 MHz bus at 2.7-5.5 V gives a deterministic interrupt response that simplifies CAN frame timing. Compared with a discrete CAN transceiver plus 8-bit MCU approach, the on-chip MSCAN08 saves board area and lets the firmware handle CAN state changes directly, with the on-chip COP watchdog recovering the node from bus-stall conditions.
おすすめ
HVAC Flap and Blower Motor Controller
The MC68HC908GZ8MFJ's PWM and 1 KB RAM are sufficient for closed-loop blower and HVAC flap control, and its MSCAN08 interface allows the module to appear as a CAN node on the vehicle network. The PWM block provides the modulation needed to drive a small DC blower via a MOSFET bridge, and the ADC reads temperature and position feedback. Because the part runs from 5 V, it can share the blower-driver supply rail without additional level translation, which reduces BOM cost in compact HVAC modules.
おすすめ
Instrument Cluster Slave Display
The HC08 core's deterministic interrupt latency and the GZ8's SPI peripheral make the MC68HC908GZ8MFJ a good fit for slave display controllers behind an instrument cluster master. The MCU receives CAN frames from the master via MSCAN08 and drives a peripheral display driver over SPI. With 8 KB Flash the firmware easily fits a small lookup table for symbol rendering, and the 32-LQFP package gives easy access to all peripheral pins for the display-driver signals.
おすすめ
Industrial CAN Sensor Node
The MC68HC908GZ8MFJ is widely used in industrial CANopen and DeviceNet slave nodes such as proximity, level, or temperature sensors. Its 21 GPIO and ADC channels can read multiple sensors and publish the data on CAN, while the LVD/POR block ensures clean resets in noisy 24 V industrial environments. The AEC-Q100 grade also tolerates temperature and ESD swings that occur near motor drives, which makes the part attractive for factory-floor instrumentation where a more expensive 32-bit MCU is not justified.
おすすめ
LIN/CAN Gateway Slave
For low-cost LIN sub-bus nodes that also need to participate in CAN traffic, the MC68HC908GZ8MFJ combines an SCI (UART) for LIN with MSCAN08 for CAN. The part can run a simple LIN 1.x slave stack plus a CAN listener without exhausting 8 KB Flash. Designers should reserve one PWM channel for the LIN-controlled power management, and use the on-chip COP watchdog to recover from LIN bus silence, which is the most common failure mode in LIN body subnets.
おすすめ
Low-Cost Automotive Window/Lift Control Module
Window-lift controllers need a small MCU with PWM, ADC, and a CAN interface, plus enough Flash for end-of-travel, anti-pinch, and diagnostic routines. The MC68HC908GZ8MFJ's 8 KB Flash fits these routines on simpler regulators, and the AEC-Q100 grade tolerates the cold-crank transients on the 12 V battery rail. The MSCAN08 block shares window status with the central body controller over CAN, while the on-chip PWM drives the lift motor through an external half-bridge.
おすすめ
Battery-Management Slave Cell Monitor
Although the MC68HC908GZ8MFJ does not include a dedicated cell-balancing interface, the ADC and SPI peripherals are sufficient to read a small external cell-balancing front end such as a daisy-chained ADC. The MSCAN08 block carries the cell readings to a central battery controller over CAN. The 32-LQFP is compact enough to fit on a per-cell slave PCB, and the AEC-Q100 grade handles the harsh thermal environment of a battery pack. For more cells or more math, move to the GZ16 or GZ60 variants.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MC68HC908GZ8MFJ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MC68HC908GZ8CFA | MC68HC908GZ8MFA | MC68HC908GZ16MFJ | MC68HC908GZ60MFJ | MC68HC908GZ8JZ |
|---|---|---|---|---|---|---|
| Package | 32-LQFP (7x7 mm) | 32-LQFP - same | 32-LQFP - same | 32-LQFP - same | 32-LQFP - same | 32-LQFP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HC08, 8-bit | HC08, 8-bit | HC08, 8-bit | HC08, 8-bit | HC08, 8-bit | HC08, 8-bit |
| Bus Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Flash Memory | 8 KB | 8 KB | 8 KB | 16 KB | 60 KB | 8 KB |
| RAM | 1 KB | 1 KB | 1 KB | 2 KB | 2 KB | 1 KB |
| MSCAN08 (CAN 2.0B) | Yes | Yes | Yes | Yes | Yes | Yes |
| Temperature Grade | Automotive (-40 to +125 C) | Commercial | Automotive | Automotive | Automotive | Automotive |
主な差別化要因
- 8 KB Flash with on-chip CAN 2.0B controller （vs MC68HC908GZ8CFA)
- Highest-in-family Flash for firmware expansion （vs MC68HC908GZ16MFJ)
- Pin-compatible 32-LQFP form factor across the family （vs MC68HC908GZ8JZ)
設計ノート
Estimated: assuming VDD = 5.0 V, VDD current ~25 mA at 8 MHz in run mode, the power dissipation is P = 5 V x 25 mA = 0.125 W. This is well within the thermal budget of the 32-LQFP package. Place a 0.1 microfarad ceramic decoupling cap on each VDD/VSS pair and one 10 microfarad tantalum or ceramic bulk capacitor within 25 mm of the package to control supply ringing when the PWM or CAN transceivers switch.
Route the CANH and CANL differential pair from the MSCAN08 pins (CANTX/CANRX) to the external CAN transceiver with a 120-ohm characteristic impedance and 120-ohm termination at the bus ends. Keep the pair length under 1 meter on the PCB side. The crystal traces (OSC1/OSC2) should be short, surrounded by a ground pour, and kept clear of the PWM and CAN lines to avoid clock frequency shift.
Do not leave the RST pin floating - tie it to VDD through a 10 kohm pull-up and to a 0.1 microfarad cap for the POR delay. The BKGD pin must be pulled high during reset for normal operation; if the application never uses background debug mode, a 10 kohm pull-up to VDD keeps the part out of bootstrap mode. Leaving RST or BKGD floating can cause intermittent failure to start on cold-crank events.
The SCI and SPI pins on PTC0-PTC7 are 5 V tolerant only when VDD = 5 V. If the design migrates to 3.3 V peripherals, add a logic-level translator or rely on the 5 V tolerance window of the slave devices. When driving long SPI cables or optical isolators, add 50 Ω series damping at the source to control ringing and reflections at 8 MHz.
コンプライアンス情報
AEC-Q100 qualification noted on the NXP datasheet. RoHS/REACH/lead-free/halogen-free status not confirmed from the provided sources and is marked 'unknown'. Conflict-minerals compliance follows NXP's standard policy.