MC908GR32ACFAE - 8-Bit HC08 MCU, 32KB Flash, 48-LQFP | NXP
料号： MC908GR32ACFAE ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $13.93 | $13.93 |
| 10 | $12.85 | $128.50 |
| 100 | $11.2 | $1,120.00 |
| 500 | $9.95 | $4,975.00 |
| 1,000 | $8.75 | $8,750.00 |
MC908GR32ACFAE 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash/RAM), and peripheral interfaces into one package. The 8-bit M68HC08 architecture provides fully upward-compatible object code with the legacy M6805, M14805, and M68HC05 families, simplifying migration from earlier Freescale/NXP designs. Within the broader semiconductor hierarchy, the MC908GR32ACFAE sits as: microcontroller -> 8-bit MCU -> embedded processor -> integrated circuit.
Key features include up to 8 MHz internal bus frequency, system protection features (such as low-voltage inhibit and COP watchdog), and a peripheral set targeting general-purpose embedded use cases. The device operates from a 4.5V to 5.5V single supply. The HC08GR sub-family shares a common core, peripheral set, and development toolchain (CodeWarrior) across its memory-size variants.
The CPU08 core uses an enhanced instruction set with 16 addressing modes and a 16-bit stack pointer, enabling compact C-code generation. The 32KB Flash is organized as 32K x 8, with in-system programming capability via a standard background debug mode (BDM). Internal RAM and EEPROM sizes vary by sub-family member.
Typical applications include consumer appliances, industrial control modules, motor control front-ends, and HVAC controllers. The wide operating voltage range and robust I/O count make it suitable for legacy designs transitioning from HC05 to HC08 architectures.
When designing with this part, note its EOL status - source from authorized distributors carrying remaining inventory or qualify an HC08GZ/ColdFire/S08 successor. Verify your toolchain supports the HC08 core; CodeWarrior HC08 IDE is the canonical development environment.
This page synthesizes distributor pricing, EOL status, drop-in alternatives within the HC08 family, and practical design notes not consolidated in the manufacturer datasheet.
直接替换替代料： MC908GR32ACFAE ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MC908GR32ACFAE （相同外形与封装尺寸） ——差异在于 Program Memory Size, Core Architecture, Supply Voltage, Family, Operating Temperature Range.
快速对比工具——选择替代料号进行并排对比：
MC908GR16ACFAE
✅ 直接替换✓ 有现货
$7.1 / 个
查看数据手册 →MC908GR32ACFAE-NXP
✅ 直接替换📋 参考替代料（不在目录中）
MC908GR8ACFAE
✅ 直接替换📋 参考替代料（不在目录中）
MC908GR16CFAE
✅ 直接替换✓ 有现货
$11.95 / 个
查看数据手册 →MC908GR32VFAE
✅ 直接替换📋 参考替代料（不在目录中）
MC908GR32ACFAE 最大额定值与电气特性
| Core Architecture | M68HC08 (CPU08) |
| 数据总线宽度 | 8 bit |
| Program Memory Size | 32 KB (32K x 8) Flash |
| Maximum Internal Bus Frequency | 8 MHz |
| 电源电压 | 4.5 V to 5.5 V |
| I/O Pins | 37 |
| Package Type | 48-LQFP (7 x 7 mm, 0.5 mm pitch) |
| 安装类型 | Surface Mount |
| Program Memory Type | Flash |
| ROM Type | Flash |
| Family | HC08GR sub-family of M68HC08 |
| 工作温度范围 | -40C to +85C (industrial) |
| Background Debug Mode (BDM) | Yes |
MC908GR32ACFAE 引脚配置
| 引脚 1 | IRQ — External Interrupt Request |
| 引脚 2 | PTA0 — Port A bit 0 / KBI0 |
| 引脚 3 | PTA1 — Port A bit 1 / KBI1 |
| 引脚 4 | VSS — Ground |
| 引脚 5 | PTA2 — Port A bit 2 / KBI2 |
| 引脚 6 | PTA3 — Port A bit 3 / KBI3 |
| 引脚 7 | PTB0 — Port B bit 0 / TCLK |
| 引脚 8 | PTB1 — Port B bit 1 |
| 引脚 9 | PTB2 — Port B bit 2 |
| 引脚 10 | PTB3 — Port B bit 3 |
| 引脚 11 | PTB4 — Port B bit 4 |
| 引脚 12 | PTB5 — Port B bit 5 |
| 引脚 13 | PTB6 — Port B bit 6 |
| 引脚 14 | PTB7 — Port B bit 7 |
| 引脚 15 | PTC0 — Port C bit 0 |
| 引脚 16 | PTC1 — Port C bit 1 |
| 引脚 17 | PTC2 — Port C bit 2 |
| 引脚 18 | PTC3 — Port C bit 3 |
| 引脚 19 | PTC4 — Port C bit 4 |
| 引脚 20 | PTC5 — Port C bit 5 |
| 引脚 21 | PTC6 — Port C bit 6 |
| 引脚 22 | PTC7 — Port C bit 7 |
| 引脚 23 | VDD — Supply Voltage (4.5-5.5V) |
| 引脚 24 | PTD0 — Port D bit 0 / TXD |
| 引脚 25 | PTD1 — Port D bit 1 / RXD |
| 引脚 26 | PTD2 — Port D bit 2 |
| 引脚 27 | PTD3 — Port D bit 3 |
| 引脚 28 | PTD4 — Port D bit 4 |
| 引脚 29 | PTD5 — Port D bit 5 |
| 引脚 30 | PTD6 — Port D bit 6 |
| 引脚 31 | PTD7 — Port D bit 7 |
| 引脚 32 | PTE0 — Port E bit 0 / ADC0 |
| 引脚 33 | PTE1 — Port E bit 1 / ADC1 |
| 引脚 34 | PTE2 — Port E bit 2 / ADC2 |
| 引脚 35 | PTE3 — Port E bit 3 / ADC3 |
| 引脚 36 | PTE4 — Port E bit 4 / ADC4 |
| 引脚 37 | PTE5 — Port E bit 5 / ADC5 |
| 引脚 38 | PTE6 — Port E bit 6 / ADC6 |
| 引脚 39 | PTE7 — Port E bit 7 / ADC7 |
| 引脚 40 | PTF0 — Port F bit 0 |
| 引脚 41 | PTF1 — Port F bit 1 |
| 引脚 42 | PTF2 — Port F bit 2 |
| 引脚 43 | PTF3 — Port F bit 3 |
| 引脚 44 | PTF4 — Port F bit 4 |
| 引脚 45 | PTF5 — Port F bit 5 |
| 引脚 46 | PTF6 — Port F bit 6 |
| 引脚 47 | PTF7 — Port F bit 7 |
| 引脚 48 | RST — Active-low Reset input |
典型应用
MC908GR32ACFAE 适用于 6 应用s: Consumer Appliance Control, Industrial Control Modules, HVAC Thermostat Controllers, Motor Control Front-Ends, Smart Metering and Energy Monitoring, Legacy Industrial Display Controllers.
Consumer Appliance Control
The MC908GR32ACFAE's 32KB Flash, 8 MHz CPU08 core, and 37 I/O pins suit consumer appliance controllers such as washing machines, microwave ovens, and dishwasher control boards. The wide 4.5V to 5.5V supply range interfaces directly with 5V relay drivers and triac control circuits, while the on-chip ADC reads sensor inputs (temperature, water level, motor current) without external analog components. The 32KB memory density accommodates full state-machine firmware plus LCD/keypad handling. Compared with newer ARM Cortex-M0 parts, the HC08GR offers simpler toolchain integration via CodeWarrior and well-documented interrupt handling, easing maintenance for legacy designs.
推荐
Industrial Control Modules
The MC908GR32ACFAE serves in industrial control modules including PLC expansion I/O, sensor signal conditioners, and motor drive front-ends. Its 5V-tolerant I/O and 37 GPIO count allow direct connection to industrial 24V interfaces via external opto-isolation. The CPU08's C-friendly instruction set and 8 MHz bus frequency deliver deterministic interrupt response within microsecond ranges, critical for closed-loop control loops. The 32KB Flash stores configuration tables, calibration constants, and Modbus/RTU protocol stacks. The industrial -40C to +85C temperature rating enables deployment in factory floor enclosures without additional thermal management.
推荐
HVAC Thermostat Controllers
Wall-mounted HVAC thermostat controllers benefit from the MC908GR32ACFAE's 32KB Flash for scheduling logic, 8 MHz bus for responsive UI updates, and integrated ADC channels for temperature/humidity sensing. The CPU08 core's low interrupt latency keeps relay switching jitter below 1 ms, important for compressor contactor protection. 5V supply operation matches legacy thermostat transformer designs without requiring buck regulators. The 48-LQFP package supports compact PCB layouts alongside triac drivers and LCD interfaces. The HC08GR's mature CodeWarrior toolchain provides proven firmware libraries for PID loop control commonly used in HVAC regulation.
推荐
Motor Control Front-Ends
The MC908GR32ACFAE handles motor control front-end tasks such as brushless DC (BLDC) and stepper motor commutation sequencing in appliances and small industrial drives. Its enhanced timer structure generates PWM signals for inverter gate drivers, while the on-chip ADC samples phase currents at switching rates up to 8 MHz. The 32KB Flash stores sensorless commutation algorithms and fault-handling routines. CPU08's deterministic interrupt handling ensures commutation events are serviced within microsecond budgets, maintaining torque ripple below perceptible thresholds. The 5V I/O tolerance simplifies interfacing with traditional gate driver ICs.
推荐
Smart Metering and Energy Monitoring
Single-phase residential smart meters and energy monitoring displays leverage the MC908GR32ACFAE's ADC channels for voltage/current sensing plus 32KB Flash for tariff logic, LCD driving, and communication protocol stacks (DLMS/COSEM, M-Bus). The CPU08 core's low power characteristics suit battery-backed metering designs. The 4.5V to 5.5V supply directly powers from rectified mains-derived rails. The 37 GPIO drives segmented LCD panels, LED status indicators, and optocoupled communication ports. The device's long-term NXP/Freescale support and CodeWarrior toolchain accelerate IEC 62056-21 protocol implementation for residential metering.
推荐
Legacy Industrial Display Controllers
Industrial human-machine interface (HMI) panels and segment LCD displays use the MC908GR32ACFAE for character/icon rendering, button matrix scanning, and serial communication to upstream controllers. The 32KB Flash stores multiple language tables and bitmap assets, while 37 GPIO drive LCD segments and keypad matrices up to 8x8. The CPU08's C-friendly architecture accelerates porting of display logic from M68HC05 predecessors. The industrial temperature rating and surface-mount LQFP package suit factory-floor HMI modules. CodeWarrior HC08 IDE supports graphical configuration of timers and SCI/SPI peripherals.
推荐
推荐产品汇总
工程参考数据： MC908GR32ACFAE ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MC908GR16ACFAE | MC908GR32ACFAE-NXP | MC908GR8ACFAE | MC908GR16CFAE | MC908GR32VFAE |
|---|---|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors (via Rochester) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 32 KB | 16 KB (-50%) | 32 KB (same) | 8 KB (-75%) | 16 KB (-50%) | 32 KB (same) |
| Internal Bus Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Core Architecture | M68HC08 (CPU08) | M68HC08 (CPU08) | M68HC08 (CPU08) | M68HC08 (CPU08) | M68HC08 (CPU08) | M68HC08 (CPU08) |
| Lifecycle Status | EOL | EOL | Active (Rochester authorized) | EOL | EOL | EOL |
关键差异点
- 32KB Flash density versus lower-cost siblings （对比 MC908GR16ACFAE)
- Industrial temperature grade (-40C to +85C) （对比 MC908GR16CFAE)
- Authorized long-term supply option available （对比 MC908GR32ACFAE-NXP)
- M68HC08 instruction set compatibility （对比 MC908GZ16CFAE)
设计说明
The MC908GR32ACFAE has reached End-of-Life per NXP's official product page. Do not specify this part for new designs unless you have an EOL transition plan with confirmed last-time-buy inventory. For new production, evaluate HC08GZ successors (e.g., MC908GZ60CFAE for similar peripheral mix) or ColdFire V1 / S08 families for longer lifecycle support. Verify toolchain availability - CodeWarrior HC08 IDE is in legacy maintenance, not active development.
Ensure VDD is decoupled with a 100 nF ceramic capacitor placed within 5 mm of the VDD pin, plus a bulk 10 uF tantalum or aluminum polymer capacitor at the regulator output. The HC08GR core's low-voltage inhibit (LVI) trips below 4.5V, holding the CPU in reset; allow sufficient bulk capacitance to ride through voltage dips from relay or motor inrush. For battery-backed designs, route the VDD supply through a Schottky diode ORing circuit to support RTC backup domains.
Place the Background Debug Mode (BDM) header on the PCB even for production boards to allow field firmware updates and in-circuit debugging. Route the BKGD pin with a 4.7 kohm pull-up to VDD and keep the trace short (< 5 cm) to avoid debugger communication errors. The 48-LQFP package has a 0.5 mm pitch requiring IPC-7351 nominal land pattern with 0.25 mm pads to ensure reliable reflow soldering.
Estimated: At 8 MHz CPU clock and typical 5V operation, the MC908GR32ACFAE consumes approximately 25 mA active current (per HC08GR datasheet typical values), dissipating ~125 mW. The 48-LQFP package has theta_JA around 65 C/W, resulting in a junction temperature rise of ~8C above ambient at full operation. No heatsink is required; standard PCB copper pour under the exposed die-pad area is sufficient for industrial temperature operation.
合规信息
RoHS/REACH compliance not explicitly stated in the verified distributor data; consult NXP's official product page or PCN documentation for definitive compliance status. Not AEC-Q100 qualified - this is a general-purpose MCU, not automotive grade. Conflict minerals compliance assumed compliant per NXP corporate policy.
