MC908GR16ACFAE - 8-bit MCU, 16KB Flash, 48-LQFP | NXP
MPN： MC908GR16ACFAE ✗ 停產MC908GR16ACFAE 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (FLASH for program storage, RAM for data), timers, communication peripherals, and I/O pins. The HC08 family represents NXP's low-cost, high-performance 8-bit architecture positioned as a general-purpose device family targeted to consumer and industrial applications. Within the broader semiconductor hierarchy, microcontrollers sit under microprocessors and embedded processors, and the 8-bit segment remains vital for cost-sensitive, deterministic control tasks such as appliance control, sensor reading, and human-machine interface handling.
Key features of the MC908GR16ACFAE include 16KB FLASH program memory, 1KB RAM, an internal oscillator that simplifies BOM by removing the external crystal in many designs, multiple timer channels, an analog-to-digital converter, and serial communication peripherals (SCI/SPI). The internal oscillator type removes the requirement for an external clock source in cost-sensitive designs. Operating voltage range typically spans 2.7V to 5.5V and operating temperature range covers -40C to +85C industrial grade.
The device uses a single-voltage FLASH programming model and includes on-chip in-system programming (ISP) support, enabling firmware updates via the serial monitor ROM. It also integrates a watchdog timer, low-voltage detect (LVD), and multiple interrupt sources. The 48-LQFP package offers a compact 7x7 mm footprint with sufficient I/O for mid-complexity applications.
Typical applications include white goods and home appliances, HVAC control systems, industrial sensors and simple motor drives, security keypads and access panels, automotive body electronics (non-safety), consumer electronics remote controls, and battery chargers. Designers often choose the MC908GR16ACFAE when a proven 8-bit architecture with reliable toolchain support is preferred over migrating to a more complex 32-bit MCU.
When designing with this part, ensure ISP programming pins are accessible on the production board for firmware updates. Verify the internal oscillator accuracy against timing-critical UART baud-rate requirements; an external crystal may be needed for high-speed or long-distance serial communications.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes curated for engineers maintaining legacy HC08 designs or performing EOL risk-replacement analysis not found in the standalone manufacturer datasheet.
直接替換替代品，適用於 MC908GR16ACFAE — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MC908GR16ACFAE （相同外形與佔位） — 差異在於 Core Architecture, Package, Supply Voltage, ADC, Family.
MC908GR16CFAE
✅ 直接替換聯絡詢價
查看資料表 →MC908GR32ACFAE
✅ 直接替換聯絡詢價
查看資料表 →MC908GR32CFAE
✅ 直接替換📋 參考替代品（不在目錄中）
MC908GZ16MFAE
✅ 直接替換聯絡詢價
查看資料表 →MC908GR16ACFAE 最大額定值與電氣特性
| Core Architecture | M68HC08 (CPU08) |
| 資料匯流排寬度 | 8 bit |
| Program Memory Size | 16 KB (16K x 8) FLASH |
| RAM Size | 1 KB (1K x 8) |
| Maximum CPU Clock Frequency | 8 MHz |
| Number of I/O Lines | 37 |
| 封裝 / 外殼 | 48-LQFP (7x7 mm) |
| 安裝類型 | Surface Mount |
| Oscillator Type | Internal |
| Program Memory Type | FLASH |
| 工作電源電壓 | 2.7 V to 5.5 V |
| 工作溫度範圍 | -40 C to +85 C |
| Peripherals | SCI, SPI, ADC, Timers, Watchdog |
| Connectivity | SCI, SPI |
| Packaging | Tray |
| RoHS 狀態 | Compliant |
| Family | MC68HC08G |
MC908GR16ACFAE 48-lqfp (7x7 mm) 腳位配置指南
MC908GR16ACFAE（48-lqfp (7x7 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： MC908GR16ACFAE.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC908GR16ACFAE 適用於 6 應用s: White Goods and Home Appliance Control, HVAC Control Systems, Industrial Sensor Modules, Security Keypads and Access Panels, Consumer Electronics Remote Controls, Battery Chargers for Handheld Tools.
White Goods and Home Appliance Control
The MC908GR16ACFAE fits white goods and home appliance control boards such as washing machines, dishwashers, and microwave ovens. Its 16KB FLASH comfortably stores appliance state-machine firmware (wash cycles, motor profiles, sensor calibration) while 1KB RAM handles small data buffers and the 37 I/O lines connect directly to keypads, LED indicators, relay drivers, and triac outputs. The internal oscillator eliminates an external crystal on the main board for cost reduction. At 8 MHz CPU speed the part handles real-time motor control and user-interface polling with deterministic latency. AEC-Q100 is not required for indoor appliances. Pair the MCU with discrete relay drivers and an optocoupler-isolated triac circuit for line-voltage loads.
推薦
HVAC Control Systems
The MC908GR16ACFAE is well-suited for HVAC control boards including thermostats, fan controllers, and zone valves. Its 2.7V to 5.5V supply range supports both 3.3V and 5V HVAC system rails, and the on-chip ADC reads temperature sensors (NTC thermistors) directly. The 37 I/O lines accommodate multiple relay outputs for compressor, fan, and heat-pump reversing valve control. Internal watchdog timer and brown-out detect add reliability against long-term industrial environmental stress. Use it for non-connected thermostats; for Wi-Fi/Bluetooth-enabled smart thermostats migrate to a Cortex-M0+ part.
推薦
Industrial Sensor Modules
The MC908GR16ACFAE serves as the brain of low-cost industrial sensor modules such as proximity sensors, photoelectric switches, and level meters. Its internal oscillator removes the need for a precision crystal in timing-tolerant designs, and the 16KB FLASH holds simple Modbus or proprietary protocol stacks. SCI peripheral enables RS-485/RS-232 industrial fieldbus connection. The 1KB RAM is sufficient for sensor data buffering and command parsing. The industrial -40C to +85C temperature range supports factory floor deployment.
推薦
Security Keypads and Access Panels
The MC908GR16ACFAE powers security keypads, RFID access panels, and alarm-system sub-controllers. Its 37 I/O lines drive matrix keypads (4x4 or larger), LED status bars, buzzer outputs, and relay contacts for door strikes. 16KB FLASH stores access lists, PIN hashes, and event logs; 1KB RAM handles real-time buffer for keypad scanning. Watchdog timer detects firmware hang conditions which is critical for unattended security hardware. Internal oscillator is sufficient for keypad-scan timing; an external crystal is recommended only if the panel hosts an RF transceiver.
推薦
Consumer Electronics Remote Controls
The MC908GR16ACFAE is a good fit for universal remote controls, fan remote controllers, and AV receiver front panels. Low cost, small LQFP-48 footprint, and the internal oscillator simplify PCB design and BOM. 16KB FLASH holds IR protocol libraries (RC5, NEC, SIRC), device code databases, and LCD-segment driving routines. SCI/SPI allows firmware flashing during production. Operating temperature -40C to +85C handles indoor and outdoor installations such as patio fan remotes.
推薦
Battery Chargers for Handheld Tools
The MC908GR16ACFAE controls NiCd, NiMH, and basic Li-ion battery chargers for handheld power tools and consumer battery packs. Its ADC reads battery voltage and current-sense amplifiers; PWM outputs drive the charging MOSFET. 16KB FLASH stores CC/CV charging profiles and safety timer logic. Internal oscillator and watchdog timer ensure reliable long-duration charging cycles. Designers prefer this part for replacement boards of legacy tool platforms still in production.
推薦
推薦產品摘要
工程參考資料，適用於 MC908GR16ACFAE — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MC908GR16CFAE | MC908GR32ACFAE | MC908GR32CFAE | MC908GZ16MFAE |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| 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 |
| Core / Architecture | M68HC08 (CPU08) 8-bit | M68HC08 (CPU08) 8-bit - same | M68HC08 (CPU08) 8-bit - same | M68HC08 (CPU08) 8-bit - same | M68HC08 (CPU08) 8-bit - same |
| CPU Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| FLASH Program Memory | 16 KB | 16 KB | 32 KB (+100%) | 32 KB (+100%) | 16 KB |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Number of I/O Lines | 37 | 37 | 37 | 37 | 37 |
| CAN Peripheral | No | No | No | No | Yes (adds CAN, different peripheral map) |
主要差異化特點
- On-chip FLASH with ISP support (對比Older HC05 mask-ROM MCUs)
- Internal oscillator (對比MC908GZ16MFAE (CAN variant))
- Same-footprint 32KB upgrade path (對比MC908GR32ACFAE)
設計說明
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of each VDD/VSS pin pair. The MC908GR16ACFAE draws brief current spikes during FLASH programming; add a 10 uF bulk capacitor near the supply pins. The internal voltage regulator requires a stable input - avoid sharing the decoupling capacitor with high-current digital loads such as relay coils.
Route the BKGD (background debug mode) pin to a programming header accessible on the production board, or expose test points. Without ISP access, firmware updates require removing the MCU. Keep analog signals (ADC inputs) away from switching nodes (PWMs, relay drivers) on the PCB layer stack-up to avoid coupling noise into ADC readings.
Do not assume the internal oscillator provides UART-grade accuracy across temperature. For SCI baud rates above 38400 or for SCI over RS-485 networks, add an external crystal. Verify that the COP watchdog is enabled in firmware - factory default leaves it disabled, but unattended industrial designs must enable the watchdog for fail-safe recovery.
The 48-LQFP package has a 0.5 mm lead pitch requiring fine-pitch PCB design rules. Use 0.2 mm trace/space with microvia stack-up if available; if not, route signal traces on outer layers with conservative clearances. The exposed pad (if present) must be soldered to the ground plane for thermal dissipation. Both figure-of-merit and ESD performance improve with a continuous ground pour beneath the MCU.
合規資訊
RoHS compliant per NXP product page. AEC-Q100 not qualified - target consumer/industrial use. Halogen-free status not stated in distributor data; assume yes for industrial markets. EOL notice requires sourcing via authorized after-market suppliers such as Rochester Electronics.