MCHC908GR8MFAE - 8KB Flash 8-bit HC08 MCU | NXP 32-LQFP
料号： MCHC908GR8MFAE ✓ 量产中MCHC908GR8MFAE 概述
An 8-bit microcontroller (MCU) is a single-chip computer optimized for bit-oriented control and small data structures. The M68HC08 family builds on the legacy M68HC05 architecture with an enhanced CPU, additional addressing modes, a flash-friendly bus, and on-chip peripherals that allow direct replacement of older HC05 designs. Within the broader taxonomy, this part is an 8-bit MCU -> microcontroller -> flash port -> embedded controller -> semiconductor, and it remains a common denominator in space-constrained designs.
The MCHC908GR8MFAE features a 7.5 KB flash program memory, 256 B RAM, 16-bit timers, and integrated serial communication interfaces that simplify wiring backplane-style automotive networks. The flash-based program memory enables in-application reprogrammability, which simplifies firmware updates on the production line. The 8 MHz bus rate and low pin count deliver predictable deterministic execution in hard real-time loops.
The part is fabricated on a mature CMOS process optimized for low active current and wide automotive temperature operation. The 32-pin LQFP package exposes GPIO, timer I/O, and serial interface pins while keeping the PCB footprint compact at 7x7 mm. The architecture supports the standard HC08 instruction set, simplifying code portability from legacy HC05/HC08 designs.
Typical applications include automotive body controllers, instrument cluster sub-modules, low-end HVAC control panels, sensor conditioning nodes, and consumer appliances where small code size and low cost are paramount. The 32-LQFP footprint is widely supported by hand-soldering and reflow profiles.
When designing with this device, ensure that in-system programming pins are accessible on the PCB and that decoupling is placed close to the supply pins. The on-chip flash endurance and retention should be evaluated against the target field lifetime, especially for automotive applications.
直接替换替代料： MCHC908GR8MFAE ——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： MCHC908GR8MFAE （相同外形与封装尺寸） ——差异在于 Program Memory Size, RAM Size.
MCHC908GR8CFAE
✅ 直接替换联系询价
查看数据手册 →MCHC908GR8VFAE
✅ 直接替换📋 参考替代料（不在目录中）
MCHC908GR16CFAE
✅ 直接替换📋 参考替代料（不在目录中）
MC908GR8CBE
✅ 直接替换📋 参考替代料（不在目录中）
MCHC908GR8MFAE 最大额定值与电气特性
| Core | M68HC08 |
| 数据总线宽度 | 8 bit |
| Program Memory Size | 7.5 KB (7.5K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 256 B |
| CPU Speed | 8 MHz |
| Timer | 16-bit |
| Serial Communication | SCI/SPI peripherals |
| 封装 | 32-LQFP (7x7 mm) |
| 安装类型 | Surface Mount |
| Terminal Form | GULL WING |
| Package Shape | SQUARE |
| Temperature Grade | AUTOMOTIVE |
| 工作温度 | -40C to +125C (automotive grade) |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
MCHC908GR8MFAE 引脚配置
| 引脚 1 | IRQ — External interrupt request |
| 引脚 2 | RST — Reset input |
| 引脚 3 | VSS — Ground |
| 引脚 4 | OSC1 — Oscillator input |
| 引脚 5 | OSC2 — Oscillator output |
| 引脚 6 | VDD — Supply voltage |
| 引脚 7 | PTA0 — Port A bit 0 / GPIO |
| 引脚 8 | PTA1 — Port A bit 1 / GPIO |
| 引脚 9 | PTA2 — Port A bit 2 / GPIO |
| 引脚 10 | PTA3 — Port A bit 3 / GPIO |
| 引脚 11 | PTA4 — Port A bit 4 / GPIO |
| 引脚 12 | PTA5 — Port A bit 5 / GPIO |
| 引脚 13 | PTA6 — Port A bit 6 / GPIO |
| 引脚 14 | PTA7 — Port A bit 7 / GPIO |
| 引脚 15 | PTB0 — Port B bit 0 / GPIO |
| 引脚 16 | PTB1 — Port B bit 1 / GPIO |
| 引脚 17 | PTB2 — Port B bit 2 / GPIO |
| 引脚 18 | PTB3 — Port B bit 3 / GPIO |
| 引脚 19 | PTB4 — Port B bit 4 / GPIO |
| 引脚 20 | PTB5 — Port B bit 5 / GPIO |
| 引脚 21 | PTB6 — Port B bit 6 / GPIO |
| 引脚 22 | PTB7 — Port B bit 7 / GPIO |
| 引脚 23 | PTC0 — Port C bit 0 / GPIO or TCH0 |
| 引脚 24 | PTC1 — Port C bit 1 / GPIO or TCH1 |
| 引脚 25 | PTC2 — Port C bit 2 / GPIO or TCH2 |
| 引脚 26 | PTC3 — Port C bit 3 / GPIO or TCH3 |
| 引脚 27 | PTC4 — Port C bit 4 / GPIO or TCH4 |
| 引脚 28 | PTC5 — Port C bit 5 / GPIO or TCH5 |
| 引脚 29 | TXD — SCI transmit |
| 引脚 30 | RXD — SCI receive |
| 引脚 31 | SS — SPI slave select |
| 引脚 32 | VDD — Supply voltage (secondary) |
典型应用
MCHC908GR8MFAE 适用于 6 应用s: Automotive Body Controllers, HVAC Control Panels, Instrument Cluster Sub-Modules, Sensor Conditioning Nodes, Consumer Appliance Control, Industrial Control Modules.
Automotive Body Controllers
The MCHC908GR8MFAE's automotive temperature range (-40C to +125C) and 8-bit HC08 core with 7.5 KB flash make it a natural choice for low-speed automotive body controllers managing lighting, mirror adjustments, and accessory switching. With 8 MHz bus and 256 B RAM it executes simple PWM and switch-debounce tasks deterministically. Recommended companion MPNs: MC9S08DZ32AMLH, MC908GZ32VFUE.
推荐
HVAC Control Panels
The MCHC908GR8MFAE fits HVAC control-panel applications where compact 32-LQFP footprint, low power, and 7.5 KB flash are sufficient to drive keypad scanning, LED indicators, and basic temperature regulation loops. Its automotive-grade qualification handles thermal stress near cabin HVAC modules. Companion MPNs: MC9S08QG4CFFE, MC9S08SH4MFK.
推荐
Instrument Cluster Sub-Modules
Instrument cluster sub-modules that drive gauge stepper motors and warning lamps benefit from the MCHC908GR8MFAE's 16-bit timer for PWM generation and its automotive-grade temperature tolerance. The 32-LQFP provides sufficient GPIO for indicator and dimming functions while the HC08 core executes fast gauge updates. Companion MPNs: MC9S08SE4CRL, MC9S08DV48ACLF.
推荐
Sensor Conditioning Nodes
The MCHC908GR8MFAE is well-suited for distributed sensor nodes that read analog signals, apply basic linearization, and forward data over a serial link. With 7.5 KB flash there is room for lookup tables and small calibration routines, while the 16-bit timer supports precise sampling intervals. Its low pin count keeps node PCB cost down. Companion MPNs: MC9S08QD4CSC, MC908QT2ACPE.
推荐
Consumer Appliance Control
White-goods and small consumer appliances needing deterministic 8-bit control benefit from the MCHC908GR8MFAE's mature HC08 toolchain and proven flash endurance. With 7.5 KB flash the part hosts user-interface state machines, while the 16-bit timer drives motor PWM and buzzer tones. Its surface-mount 32-LQFP supports automated assembly. Companion MPNs: MC908QY4AMPE, MC908QC16MDTE.
推荐
Industrial Control Modules
Industrial control modules such as relay drivers and small PLC expansion cards can use the MCHC908GR8MFAE for timing, debounce, and serial communication functions. Its wide operating temperature range supports factory-floor environments, while the automotive-grade qualification delivers long-term reliability. The 32-LQFP is easy to inspect and rework. Companion MPNs: MC9S12C32MPBE16, MC908AP16ACBE.
推荐
推荐产品汇总
工程参考数据： MCHC908GR8MFAE ——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 | MCHC908GR8CFAE | MCHC908GR8VFAE | MCHC908GR16CFAE | MC908GR8CBE |
|---|---|---|---|---|---|
| Package | 32-LQFP (7x7 mm) | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core Architecture | M68HC08 8-bit | M68HC08 8-bit | M68HC08 8-bit | M68HC08 8-bit | M68HC08 8-bit |
| CPU Speed | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Flash Memory | 7.5 KB | 7.5 KB | 7.5 KB | 15 KB | 7.5 KB |
| RAM | 256 B | 256 B | 256 B | 384 B | 256 B |
| Temperature Grade | Automotive | Commercial | Extended | Commercial | Automotive |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant | Compliant |
关键差异点
- Automotive temperature grade as standard （对比 MCHC908GR8CFAE)
- Doubled flash for growing code bases （对比 MCHC908GR16CFAE)
- Legacy HC05 code compatibility （对比 MC908QT2ACPE)
设计说明
Place a 100 nF decoupling capacitor as close as possible to each VDD pin of the MCHC908GR8MFAE to suppress switching transients on the internal 8 MHz bus. Add a bulk 10 uF tantalum or ceramic capacitor near the regulator output to handle inrush during flash programming. Avoid long VDD traces, which can resonate with the package lead inductance and cause voltage dips during peak CPU activity.
Route the OSC1/OSC2 traces as short as possible and keep them away from switching signals such as PWM outputs on PTC0-PTC5 to avoid coupling noise into the CPU clock. For the 32-LQFP footprint, use a continuous ground plane beneath the part to reduce EMI. Keep the reset pin trace short and add an external pull-up to VDD to ensure reliable reset behavior at power-up.
Do not exceed the maximum flash endurance specification when designing in-application reprogramming loops, or the part may fail in the field. Always configure unused GPIO pins as outputs to reduce quiescent current. Verify the watchdog timer is enabled for automotive safety-critical designs to recover from software lockups.
合规信息
Automotive temperature grade per Vyrian. RoHS and REACH compliance per NXP standard documentation. AEC-Q100 status inferred from automotive temperature grade designation.