MC908GR32ACFAE - 8-Bit HC08 MCU, 32KB Flash, 48-LQFP | NXP
MPN: MC908GR32ACFAE ✗ Cuối đờiMC908GR32ACFAE Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho MC908GR32ACFAE — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MC908GR32ACFAE (cùng hình factor và footprint) — khác nhau ở Program Memory Size, Core Architecture, Supply Voltage, Family, Operating Temperature Range.
MC908GR16ACFAE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908GR32ACFAE-NXP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC908GR8ACFAE
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC908GR16CFAE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908GR32VFAE
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC908GR32ACFAE Tỷ lệ tối đa & tính chất điện
| Core Architecture | M68HC08 (CPU08) |
| Bề rộng đường dữ liệu | 8 bit |
| Program Memory Size | 32 KB (32K x 8) Flash |
| Maximum Internal Bus Frequency | 8 MHz |
| Điện áp cung cấp | 4.5 V to 5.5 V |
| I/O Pins | 37 |
| Package Type | 48-LQFP (7 x 7 mm, 0.5 mm pitch) |
| Kiểu lắp đặt | Surface Mount |
| Program Memory Type | Flash |
| ROM Type | Flash |
| Family | HC08GR sub-family of M68HC08 |
| Khoảng nhiệt độ hoạt động | -40C to +85C (industrial) |
| Background Debug Mode (BDM) | Yes |
Cấu hình chân MC908GR32ACFAE
| Chân 1 | IRQ — External Interrupt Request |
| Chân 2 | PTA0 — Port A bit 0 / KBI0 |
| Chân 3 | PTA1 — Port A bit 1 / KBI1 |
| Chân 4 | VSS — Ground |
| Chân 5 | PTA2 — Port A bit 2 / KBI2 |
| Chân 6 | PTA3 — Port A bit 3 / KBI3 |
| Chân 7 | PTB0 — Port B bit 0 / TCLK |
| Chân 8 | PTB1 — Port B bit 1 |
| Chân 9 | PTB2 — Port B bit 2 |
| Chân 10 | PTB3 — Port B bit 3 |
| Chân 11 | PTB4 — Port B bit 4 |
| Chân 12 | PTB5 — Port B bit 5 |
| Chân 13 | PTB6 — Port B bit 6 |
| Chân 14 | PTB7 — Port B bit 7 |
| Chân 15 | PTC0 — Port C bit 0 |
| Chân 16 | PTC1 — Port C bit 1 |
| Chân 17 | PTC2 — Port C bit 2 |
| Chân 18 | PTC3 — Port C bit 3 |
| Chân 19 | PTC4 — Port C bit 4 |
| Chân 20 | PTC5 — Port C bit 5 |
| Chân 21 | PTC6 — Port C bit 6 |
| Chân 22 | PTC7 — Port C bit 7 |
| Chân 23 | VDD — Supply Voltage (4.5-5.5V) |
| Chân 24 | PTD0 — Port D bit 0 / TXD |
| Chân 25 | PTD1 — Port D bit 1 / RXD |
| Chân 26 | PTD2 — Port D bit 2 |
| Chân 27 | PTD3 — Port D bit 3 |
| Chân 28 | PTD4 — Port D bit 4 |
| Chân 29 | PTD5 — Port D bit 5 |
| Chân 30 | PTD6 — Port D bit 6 |
| Chân 31 | PTD7 — Port D bit 7 |
| Chân 32 | PTE0 — Port E bit 0 / ADC0 |
| Chân 33 | PTE1 — Port E bit 1 / ADC1 |
| Chân 34 | PTE2 — Port E bit 2 / ADC2 |
| Chân 35 | PTE3 — Port E bit 3 / ADC3 |
| Chân 36 | PTE4 — Port E bit 4 / ADC4 |
| Chân 37 | PTE5 — Port E bit 5 / ADC5 |
| Chân 38 | PTE6 — Port E bit 6 / ADC6 |
| Chân 39 | PTE7 — Port E bit 7 / ADC7 |
| Chân 40 | PTF0 — Port F bit 0 |
| Chân 41 | PTF1 — Port F bit 1 |
| Chân 42 | PTF2 — Port F bit 2 |
| Chân 43 | PTF3 — Port F bit 3 |
| Chân 44 | PTF4 — Port F bit 4 |
| Chân 45 | PTF5 — Port F bit 5 |
| Chân 46 | PTF6 — Port F bit 6 |
| Chân 47 | PTF7 — Port F bit 7 |
| Chân 48 | RST — Active-low Reset input |
Ứng dụng tiêu biểu
MC908GR32ACFAE phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC908GR32ACFAE — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- 32KB Flash density versus lower-cost siblings (vsMC908GR16ACFAE)
- Industrial temperature grade (-40C to +85C) (vsMC908GR16CFAE)
- Authorized long-term supply option available (vsMC908GR32ACFAE-NXP)
- M68HC08 instruction set compatibility (vsMC908GZ16CFAE)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
