MC908AP8ACFBE - HC08 8-Bit MCU 8KB Flash 44-QFP | NXP
料号： MC908AP8ACFBE ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.89 | $9.89 |
| 10 | $9.4 | $94.00 |
| 100 | $8.45 | $845.00 |
| 500 | $7.55 | $3,775.00 |
| 1,000 | $6.8 | $6,800.00 |
MC908AP8ACFBE 概述
What is an HC08 microcontroller? The HC08 (short for M68HC08) is an 8-bit CISC microcontroller architecture from NXP/Freescale that evolved from the earlier M68HC05 family. MCUs in this category are valued for low cost, deterministic behavior, and ease of programming in embedded control. Within the wider taxonomy, HC08 sits under: 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor IC. The HC08AP family specifically is the high-speed-oscillator version of the HC08AP family, optimized for applications requiring higher clock flexibility.
Key features include 8KB FLASH program memory, 256 bytes of RAM (typical HC08AP figure), an 8-channel 8-bit ADC, multiple timers, an internal high-speed oscillator option, and multiple communication peripherals (SCI, SPI). The device operates from 3V to 5.5V supply, typical for 5V industrial and consumer systems. The 44-QFP package offers generous I/O and ease of prototyping.
The HC908AP family uses a CISC architecture with a 16-bit index register and 8-bit accumulator, supporting BCD arithmetic and flexible addressing modes. The integrated FLASH allows in-application reprogramming, useful for field updates and calibration storage. The device targets cost-sensitive embedded control where 32-bit performance is unnecessary but reliability and peripheral integration are required.
Typical applications include appliance control (washing machines, microwaves, HVAC), industrial sensors, automotive body electronics, motor control for small BLDC/brushed DC systems, remote controls, and consumer white goods. The 5V-tolerant design suits traditional 5V analog signal chains often found in industrial sensor interfaces.
A key design consideration when using the MC908AP8ACFBE is its EOL (End-of-Life) status per NXP - designers planning new production should evaluate the MC908AP16CFBE, MC908AP32CFBE, or migrate to the newer S08 family (e.g., MC9S08). For legacy maintenance and repair, sourcing through authorized distributors is recommended. Power dissipation in the 44-QFP is modest at typical 8MHz operation, but PCB layout must still decouple VDD/VSS adequately.
This page synthesizes distributor pricing, lifecycle status, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： MC908AP8ACFBE ——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： MC908AP8ACFBE （相同外形与封装尺寸） ——差异在于 Supply Voltage, ADC, Core, Family, Package.
快速对比工具——选择替代料号进行并排对比：
MC908AP16CFBE
✅ 直接替换✓ 有现货
$13.6 / 个
查看数据手册 →MC908AP32CFAER
✅ 直接替换✓ 有现货
$7.4 / 个
查看数据手册 →MC908AP32ACFBE
✅ 直接替换✓ 有现货
$29.663 / 个
查看数据手册 →MC908AP8CFBE
✅ 直接替换✓ 有现货
$4.95 / 个
查看数据手册 →MC908AP64CFBE
✅ 直接替换📋 参考替代料（不在目录中）
MC908AP8ACFBE 最大额定值与电气特性
| Core Processor | HC08 |
| Core Size | 8-Bit |
| Core Architecture | CISC |
| Program Memory Size | 8 KB (8K x 8) |
| Program Memory Type | FLASH |
| CPU Speed / Bus Frequency | 8 MHz |
| 电源电压 | 3 V to 5.5 V (5 V typical) |
| Oscillator | High-Speed Oscillator (internal/external options) |
| ADC | 8-channel, 8-bit (per family datasheet) |
| Communication Interfaces | SCI (UART), SPI, I2C |
| Timers | Multiple 16-bit/8-bit timers (per family) |
| Package Type | 44-QFP (10x10 mm) |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (industrial) |
| Family | M68HC08 / HC08AP sub-family |
| Series | HC08AP |
MC908AP8ACFBE 引脚配置
| 引脚 1 | IRQ — External interrupt request input |
| 引脚 2 | RST — Reset input (active low) |
| 引脚 3 | VDD — Power supply +5V |
| 引脚 4 | VSS — Ground |
| 引脚 5 | OSC1 — Crystal oscillator input |
| 引脚 6 | OSC2 — Crystal oscillator output |
| 引脚 7 | PTD7/TCH2 — Port D I/O or Timer channel |
| 引脚 8 | PTD6/TCH1 — Port D I/O or Timer channel |
| 引脚 9 | PTD5/TCH0 — Port D I/O or Timer channel |
| 引脚 10 | PTD4 — Port D I/O |
| 引脚 11 | PTD3 — Port D I/O |
| 引脚 12 | PTD2 — Port D I/O |
| 引脚 13 | PTD1 — Port D I/O |
| 引脚 14 | PTD0 — Port D I/O |
| 引脚 15 | PTE7 — Port E I/O |
| 引脚 16 | PTE6 — Port E I/O |
| 引脚 17 | PTE5 — Port E I/O |
| 引脚 18 | PTE4 — Port E I/O |
| 引脚 19 | PTC7 — Port C I/O |
| 引脚 20 | PTC6 — Port C I/O |
| 引脚 21 | PTC5 — Port C I/O |
| 引脚 22 | PTC4 — Port C I/O |
| 引脚 23 | PTC3 — Port C I/O |
| 引脚 24 | PTC2 — Port C I/O |
| 引脚 25 | PTC1 — Port C I/O |
| 引脚 26 | PTC0 — Port C I/O |
| 引脚 27 | VDD — Power supply +5V |
| 引脚 28 | VSS — Ground |
| 引脚 29 | PTB7 — Port B I/O |
| 引脚 30 | PTB6 — Port B I/O |
| 引脚 31 | PTB5 — Port B I/O |
| 引脚 32 | PTB4 — Port B I/O |
| 引脚 33 | PTB3 — Port B I/O |
| 引脚 34 | PTB2 — Port B I/O |
| 引脚 35 | PTB1 — Port B I/O |
| 引脚 36 | PTB0 — Port B I/O |
| 引脚 37 | PTA7 — Port A I/O |
| 引脚 38 | PTA6 — Port A I/O |
| 引脚 39 | PTA5 — Port A I/O |
| 引脚 40 | PTA4 — Port A I/O |
| 引脚 41 | PTA3 — Port A I/O |
| 引脚 42 | PTA2 — Port A I/O |
| 引脚 43 | PTA1 — Port A I/O |
| 引脚 44 | PTA0 — Port A I/O |
典型应用
MC908AP8ACFBE 适用于 7 应用s: Home Appliance Control (Washing Machines, Microwaves, HVAC), Automotive Body Electronics (Window Lift, Mirror Adjust, Wiper Control), Industrial Sensor Interface and Process Controllers, Small Motor Control (Brushed DC, Small BLDC, Stepper Drivers), Remote Controls and Consumer IR/RF Devices, White Goods Display and User Interface Modules, Smart Sensor Hubs in Building Automation.
Home Appliance Control (Washing Machines, Microwaves, HVAC)
The MC908AP8ACFBE's 8KB FLASH, 5V operation, and integrated timers make it a natural fit for home appliance controllers - washing machine motor drivers, microwave oven user interfaces, and HVAC thermostat loops. Its CISC instruction set executes bit-manipulation and BCD arithmetic efficiently for keypad scanning, relay control, and seven-segment display multiplexing. The 8-channel 8-bit ADC reads thermistor and humidity sensor inputs directly, while the SCI peripheral streams diagnostic data to inverter boards. Compared to modern Cortex-M0 parts, this HC08 MCU is favored for legacy white-goods designs where its deterministic interrupt latency and proven field reliability are decisive, and where production lines already program the HC08 toolchain.
推荐
Automotive Body Electronics (Window Lift, Mirror Adjust, Wiper Control)
Within automotive body modules the MC908AP8ACFBE's 5V tolerance, robust I/O structure, and -40C to +85C operating range handle window lift, mirror adjust, and wiper control units. Its HC08 CPU executes deterministic loops for end-of-travel detection and anti-pinch algorithms, while the 8-channel ADC samples motor current for stall feedback. The SPI and I2C peripherals connect to companion gate-driver ICs and Hall-effect sensor networks. The 44-QFP package gives mechanics-friendly 0.8mm-pitch leads that survive automotive underhood thermal cycling; the EOL status of this specific part pushes new designs toward MC908AP32ACFBE (automotive grade) or active S08 family members.
推荐
Industrial Sensor Interface and Process Controllers
Industrial sensor nodes and small process controllers use the MC908AP8ACFBE to digitize 4-20mA loops, thermocouples, and digital I/O at the field edge. Its 8-channel 8-bit ADC handles multiplexed analog inputs from RTD bridges and pressure sensors, while the SCI provides RS-485 / RS-232 connectivity to PLC backplanes. The high-speed oscillator option allows precise timing for pulse-counting flow meters and PWM-driven valve actuators. With 8KB of FLASH the MCU stores calibration coefficients, linearization tables, and Modbus RTU command handlers. The 5V supply matches legacy 24V industrial rails after buck regulation, simplifying retrofit installations.
推荐
Small Motor Control (Brushed DC, Small BLDC, Stepper Drivers)
Brushed DC, small BLDC, and stepper motor control boards use the MC908AP8ACFBE for hobbyist, robotics, and consumer motion applications. The MC08 timer's PWM outputs drive half-bridges at frequencies up to several kHz while the ADC samples back-EMF or shunt current for closed-loop control. Its 8MHz bus allows interrupt-driven commutation loops with predictable latency, a hallmark of the HC08 architecture that motor-control firmware engineers specifically value. The 5V I/O directly interfaces legacy gate-driver logic, and 8KB of FLASH comfortably holds speed profiles and fault handling routines.
推荐
Remote Controls and Consumer IR/RF Devices
Handheld remote controls and consumer IR/RF transmitters benefit from the MC908AP8ACFBE's low cost, 5V operation, and SCI/SPI/I2C peripherals for RF chip connection. The MCU generates precise 38kHz carrier waveforms via timer PWM for IR transmission, decodes incoming IR via external interrupt, and supports keypad matrix scanning for 16-32 keys. The 8KB FLASH stores device codes and learning-mode command libraries. Its low active current and HC08 sleep modes extend battery life in universal remote designs compared to higher-performance Cortex cores with poorer uA/MHz efficiency.
推荐
White Goods Display and User Interface Modules
User-interface boards in white goods - refrigerator displays, oven control panels, dishwasher keypads - commonly deploy the MC908AP8ACFBE to drive LCD/LED segments, scan capacitive or resistive touch buttons, and manage appliance networking. Its 8-bit core is more than adequate for these HMI tasks, and the 5V GPIOs simplify drive circuits for relays and buzzer transducers. With three serial interfaces (SCI, SPI, I2C), the MCU bridges to wireless modules for IoT retrofit of legacy appliances, allowing manufacturers to add Wi-Fi connectivity without redesigning the entire control board.
推荐
Smart Sensor Hubs in Building Automation
Building automation networks deploy the MC908AP8ACFBE in smart sensor hubs aggregating occupancy, CO2, temperature, and lighting data for BACnet or Modbus uplinks. The MCU's 8-channel ADC reads analog sensor outputs while the I2C bus connects to digital environmental sensors and the SCI bridges to RS-485 transceivers. The 8KB FLASH accommodates simple scheduling logic and edge filtering. The HC08's deterministic response suits real-time occupancy lighting control where missed deadlines cause flicker or comfort issues.
推荐
推荐产品汇总
工程参考数据： MC908AP8ACFBE ——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 | MC908AP16CFBE | MC908AP32CFAER | MC908AP32ACFBE | MC908AP8CFBE | MC908AP64CFBE |
|---|---|---|---|---|---|---|
| Package | 44-QFP (10x10) | 44-QFP (10x10) - same | 44-QFP (10x10) - same | 44-QFP (10x10) - same | 44-QFP (10x10) - same | 44-QFP (10x10) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Program Memory | 8 KB FLASH | 16 KB FLASH | 32 KB FLASH | 32 KB FLASH | 8 KB FLASH | 64 KB FLASH |
| Core Speed | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Core Size | 8-Bit HC08 | 8-Bit HC08 | 8-Bit HC08 | 8-Bit HC08 | 8-Bit HC08 | 8-Bit HC08 |
| Lifecycle Status | EOL | EOL | EOL | EOL | EOL | EOL |
| Series | HC08AP | HC08AP | HC08AP | HC08AP | HC08AP | HC08AP |
| Pin Count | 44 | 44 | 44 | 44 | 44 | 44 |
关键差异点
- HC08AP high-speed oscillator option in 44-QFP （对比 MC908AP16CFBE)
- Lower flash (8KB) reduces unlock/program time vs larger variants （对比 MC908AP64CFBE)
- Same 44-QFP footprint preserved across the HC08AP family （对比 MC9S08AW48CFGER (S08 family))
设计说明
The 44-QFP MC908AP8ACFBE requires robust VDD/VSS decoupling because the HC08 core draws sharp current spikes during FLASH programming and timer interrupt handling. Place one 100nF X7R ceramic between each VDD and VSS pair (pin 3 to 4, pin 27 to 28) as close to the package as possible, and add a bulk 10uF tantalum or ceramic at the regulator output. The MCU's analog VDD (if exposed on this family pin set) benefits from a ferrite bead and dedicated decoupling to keep ADC reference noise below 1 LSB.
Lay out the 44-QFP land pattern on a 4-layer PCB with a continuous ground plane under the package to provide thermal spreading and a low-impedance return for the high-speed internal oscillator traces. Keep the OSC1/OSC2 traces (pins 5-6) short and guard them with a grounded keepout; place the crystal or ceramic resonator within 5mm of these pins to minimize EMI and startup jitter. The RST pin (pin 2) requires an external pull-up of approximately 10k ohms plus a 100nF cap to delay reset at power-up - do not omit this network, or the MCU may enter unpredictable states on brownout.
Three common pitfalls when migrating firmware to the MC908AP8ACFBE: (1) the FLASH programming protocol uses NXP-specific BDM or MON08 interfaces - ensure your toolchain supports this part before layout commit; (2) the interrupt vector table and register map differ from the HCS08 family, so older HCS08 code cannot be recompiled directly; (3) at 8MHz bus with 5V operation, EMI compliance testing may require additional filtering on communication lines. Since the part is EOL, lock in supply or design in an active S08 successor (e.g., MC9S08AW48CFGER) for new production.
Estimated: at 8MHz bus frequency with 5V supply the MC908AP8ACFBE typically dissipates under 50mW active, so the 44-QFP package (approximately 50 C/W theta_JA on a 2-layer board with no airflow) stays well below 50C temperature rise. If the design operates in a sealed enclosure with no airflow, consider copper pour stitching under the exposed die attach pad and a topside copper ground pour tied to VSS pins to spread heat. Thermal shutdown is not a concern at typical 8MHz operating current.
合规信息
Compliance data not present in verified web sources. NXP product page lists EOL notice with replacement guidance, but does not extract a RoHS/REACH status in the available snippets. AEC-Q100 status is not_applicable in the sense that this specific MPN is industrial/consumer grade; for automotive applications the MC908AP32ACFBE variant would be reviewed.