MC908GR32AVFAE - 8-bit HC08 MCU, 32KB Flash, 8MHz | NXP
料号： MC908GR32AVFAE ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.43 | $8.43 |
| 10 | $7.8 | $78.00 |
| 100 | $7.1 | $710.00 |
| 500 | $6.6 | $3,300.00 |
| 1,000 | $6.1 | $6,100.00 |
MC908GR32AVFAE 概述
An 8-bit microcontroller (MCU) is an integrated circuit that combines a processor core, memory, and peripherals on a single chip, executing embedded control programs in devices ranging from appliances to automotive modules. The HC08 family sits within the broader microcontroller hierarchy: HC08 core -> 8-bit MCU -> embedded microcontroller -> semiconductor. HC08 devices are known for low-cost, low-power operation and C-efficient instruction sets.
Key features of the MC908GR32AVFAE include 37 general-purpose I/O lines, SCI and SPI serial connectivity for UART and peripheral communication, and integrated peripherals such as LVD (low-voltage detection), POR (power-on reset), and PWM. The 32KB Flash supports in-circuit reprogramming, and the device operates from a 3.3V or 5V supply, easing migration between legacy 5V systems and modern 3.3V designs.
The HC08 core executes CISC instructions at up to 8MHz bus speed, providing adequate throughput for control loops, metering, motor assist, and human-interface tasks. The flash memory and RAM sizing targets mid-range applications that outgrow 8KB-16KB parts but do not require 16-bit or 32-bit cores.
Typical applications include industrial control panels, battery chargers, appliance control, automotive body electronics, and LED lighting control, where the PWM, SCI, and SPI peripherals handle actuator drive and serial communication.
Design consideration: this part is officially listed as Obsolete by NXP; new designs should select an active MCU, and existing designs should secure stock or qualify a drop-in family alternative before the last-time-buy window closes.
This page synthesizes distributor pricing, drop-in family alternatives, and sourcing guidance not consolidated in the manufacturer datasheet.
直接替换替代料： MC908GR32AVFAE ——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： MC908GR32AVFAE （相同外形与封装尺寸） ——差异在于 Program Memory Size, Package, Supply Voltage, Core Processor, RAM Size.
快速对比工具——选择替代料号进行并排对比：
MC908GR32ACFAE
✅ 直接替换✓ 有现货
$8.75 / 个
查看数据手册 →MC908GR16AVFAE
✅ 直接替换📋 参考替代料（不在目录中）
MC908GR8AVFAE
✅ 直接替换📋 参考替代料（不在目录中）
MC908GZ32MFAE
✅ 直接替换✓ 有现货
$8.95 / 个
查看数据手册 →MC908GR32AVFAE 最大额定值与电气特性
| Core Processor | HC08 (8-bit CISC) |
| Core Size | 8-Bit |
| Maximum Clock Speed | 8 MHz |
| Program Memory Size | 32 KB (32K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 1.5K x 8 |
| EEPROM Size | - |
| Number of I/O | 37 |
| Connectivity | SCI, SPI |
| Peripherals | LVD, POR, PWM |
| 电源电压 | 3.3 V / 5 V |
| 封装 | 48-LQFP (7x7 mm) |
| 安装类型 | Surface Mount |
| Packaging | Tray |
| Part Status | Obsolete |
| Series | HC08 |
| Grade | Automotive (AE suffix) |
MC908GR32AVFAE 48-lqfp (7x7 mm) 引脚配置指南
MC908GR32AVFAE（48-lqfp (7x7 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： MC908GR32AVFAE.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC908GR32AVFAE 适用于 6 应用s: Automotive Body Control Modules, Industrial Control Panels, Battery Chargers and Power Management, Appliance Control, LED Lighting Control, Sensor Signal Acquisition Nodes.
Automotive Body Control Modules
The MC908GR32AVFAE's AE automotive temperature-grade suffix and 32KB Flash made it a mainstay in body electronics such as door modules, seat control, and lighting controllers. The 37 I/O lines drive relays, lamps, and switches directly, while SCI handles LIN-style diagnostic links and PWM outputs drive lamp dimming and motor speed control. The integrated LVD and POR guarantee orderly startup and shutdown during crank transients, a critical requirement in 12V vehicle networks. Since the part is obsolete, existing automotive production lines should secure stock or qualify an active NXP automotive MCU with equivalent I/O count and flash density.
推荐
Industrial Control Panels
Industrial control panels benefit from the MC908GR32AVFAE's 5V noise-immune operation, SPI port for peripherals such as ADCs and display drivers, and SCI port for RS-485 or RS-232 communication with supervisory systems. The 32KB Flash accommodates state-machine logic, communication stacks, and calibration tables without external memory. PWM outputs drive heater, fan, or actuator control at low cost. The 3.3V/5V dual-supply capability simplifies retrofit into existing 5V panel designs while permitting 3.3V peripherals. Designers must account for the obsolete status by sizing last-time-buy quantities against the expected panel service life.
推荐
Battery Chargers and Power Management
Smart battery chargers use the MC908GR32AVFAE's PWM peripheral to control charging current via buck or buck-boost stages, while the SCI port reports charge status to host systems. The 8MHz HC08 core executes charge-control algorithms (CC/CV, temperature cut-off) with adequate timing resolution. LVD ensures safe MCU behavior as battery or supply voltage dips, and the 3.3V/5V operating range supports both portable and mains-powered charger architectures. The 37 I/O lines accommodate LED status indicators, key inputs, and thermistor channels. Verify flash-image sizing, as charger firmware with communication stacks commonly approaches 16KB, leaving comfortable margin in 32KB.
推荐
Appliance Control
Home appliances such as washing machines, dishwashers, and microwave ovens employ the MC908GR32AVFAE for user-interface scanning (keys and LED/segment displays), motor assistance timing, and sensor monitoring. The large 37-pin GPIO count covers a full button matrix and display segment drive without expansion ICs, reducing system cost. The 32KB Flash stores multi-language menus and cycle tables, while the LVD/POR peripherals ensure reliable reset behavior in electrically noisy kitchen environments. The 5V operation tolerates the supply transients typical of large appliances. As the part is discontinued, appliance service organizations should plan component banking for long-term field repair.
推荐
LED Lighting Control
Dimmable LED luminaires and drivers use the MC908GR32AVFAE's PWM outputs to generate high-resolution dimming waveforms and the SCI port to receive DMX-style or custom serial dimming commands. The 8MHz bus speed supports PWM frequencies above audible range with adequate duty-cycle resolution for flicker-free output. The 5V I/O drives MOSFET gate circuitry directly through a driver stage, and the LVD protects against misbehavior during brownouts. Firmware for multi-channel dimming curves typically consumes well under 32KB, allowing future feature additions. Because supply is ending, new lighting platforms should target NXP's currently supported MCU families with equivalent PWM capability.
推荐
Sensor Signal Acquisition Nodes
Distributed sensor nodes pair the MC908GR32AVFAE's SPI port with external precision ADCs to digitize temperature, pressure, and load-cell signals, then transmit readings over the SCI link to a host controller. The 1.5KB RAM supports local filtering and linearization tables, while the 32KB Flash stores multi-point calibration data. The 3.3V operation suits modern low-power analog front ends, and 5V compatibility serves legacy 5V transducers. Wide ambient-grade availability (AE variant) supports outdoor and industrial installations. For high-resolution acquisition (12-16 bit) applications, combine with SPI ADCs from the Site ADC family such as the TLV2545 or MAX187.
推荐
推荐产品汇总
工程参考数据： MC908GR32AVFAE ——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 | MC908GR32ACFAE | MC908GR16AVFAE | MC908GR8AVFAE | MC908GZ32MFAE |
|---|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP - same body, verify pinout |
| Brand | NXP Semiconductors (Freescale) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HC08 8-bit CISC | HC08 8-bit CISC | HC08 8-bit CISC | HC08 8-bit CISC | HC08 8-bit CISC |
| Program Memory (Flash) | 32 KB | 32 KB | 16 KB | 8 KB | 32 KB |
| Max Speed | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Connectivity / Peripherals | SCI, SPI; LVD, POR, PWM | SCI, SPI; LVD, POR, PWM | SCI, SPI; LVD, POR, PWM | SCI, SPI; LVD, POR, PWM | SCI, SPI; LVD, POR, PWM |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
关键差异点
- Full 32KB Flash density in the GR 48-LQFP family （对比 MC908GR16AVFAE)
- Automotive/extended temperature AE grade （对比 MC908GR32ACFAE)
- Dual 3.3V/5V operation （对比 MC908GR8AVFAE)
设计说明
The MC908GR32AVFAE is officially Obsolete. Do not use it in new designs: confirm your production lifetime requirement and place a last-time-buy sized to end-of-service plus field-repair spares, or qualify MC908GR32ACFAE (standard grade, same die/package) or migrate to an active NXP MCU. When buying from secondary-market brokers, demand date-code and authenticity verification, since obsolete MCUs are a frequent counterfeit target.
The device operates from a 3.3V or 5V supply; use the integrated LVD threshold appropriate to your operating voltage to guarantee code integrity during brownouts. Decouple VDD with 0.1uF ceramic plus 4.7-10uF bulk capacitance per HC08 hardware design practice. Ensure RESET and IRQ lines have defined pull-ups, and rely on POR for controlled startup. For flash reprogramming in-system, maintain supply within the datasheet programming voltage window.
The 48-LQFP (7x7 mm, 0.5 mm pitch) footprint requires fine-pitch soldering; design pads per the datasheet land-pattern recommendation and use adequate thermal relief on power pins. Route the oscillator crystal with short traces and ground guard. Keep SPI clock lines short and away from the crystal circuit to avoid glitching during 8MHz bus operation. When substituting GR-family variants, the footprint is unchanged, so no PCB respin is needed - only re-verify firmware fit.
合规信息
Compliance data was not present in the provided verified web data; consult the NXP product page or datasheet for the MC908GR32 series RoHS/REACH status.