MC68HC908JL8CFA - 8KB Flash 8MHz 8-bit HC08 MCU | NXP
料号： MC68HC908JL8CFA ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.5 | $9.50 |
| 10 | $8.2 | $82.00 |
| 100 | $7.05 | $705.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.4 | $5,400.00 |
MC68HC908JL8CFA 概述
An 8-bit microcontroller is a self-contained computing device that integrates a CPU, memory, and programmable I/O peripherals on a single die. The M68HC08 family sits within the broader 8-bit MCU hierarchy (8-bit MCU -> microcontroller -> embedded controller -> semiconductor), offering code compatibility with the legacy M6805, M146805, and M68HC05 architectures while adding modern on-chip peripherals. The MC68HC908JL8 uses an enhanced CPU08 core, known for its compact CISC instruction set, low power dissipation, and deterministic interrupt response suitable for cost-sensitive embedded designs.
Key features of the MC68HC908JL8CFA include 8KB (8K x 8) of Flash program memory supporting in-application reprogramming, 256 bytes of on-chip RAM, 26 multifunctional I/O lines, an internal oscillator that eliminates the need for an external crystal in many designs, and a wide operating voltage range that supports both 3.3V and 5V systems. The integrated ADC, PWM, and SCI peripherals enable direct sensor and actuator interfacing without external bridge chips.
The MC68HC908JL8 architecture uses the customer-specified integrated circuit (CSIC) design strategy, allowing NXP to deliver memory and peripheral combinations tailored to high-volume applications. The CPU08 core provides a 16-bit stack pointer and index register, BCD arithmetic instructions, and low-power wait/stop modes that reduce quiescent current for battery-powered or energy-conscious products.
Typical applications for the MC68HC908JL8CFA include consumer white-goods control boards, small home appliances, automotive body electronics sub-modules, simple sensor hubs, low-end motor control, and industrial control panels where its combination of Flash, ADC, PWM, and SCI reduces BOM cost. It is also widely used in educational kits and legacy equipment retrofits that require pin compatibility with older M68HC05 designs.
When designing with this MCU, allocate decoupling capacitance near the VDD/VSS pairs and observe the Flash programming voltage and timing diagrams in the manufacturer's datasheet. The internal oscillator simplifies BOM but is less accurate than an external crystal; designs with strict serial baud-rate tolerance should add an external resonator. Many newer NXP designs (S08, S12, Kinetis) offer lower power and more peripherals for new projects.
This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not collected in a single place on the manufacturer datasheet, helping engineers select, qualify, and source the MC68HC908JL8CFA quickly.
直接替换替代料： MC68HC908JL8CFA ——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： MC68HC908JL8CFA （相同外形与封装尺寸） ——差异在于 Core, Program Memory Size, RAM Size, Package, ADC.
快速对比工具——选择替代料号进行并排对比：
S9S08AW32E5MPUE
✅ 直接替换✓ 有现货
$3.95 / 个
查看数据手册 →MC9S08AW32MFGE
✅ 直接替换✓ 有现货
$3.15 / 个
查看数据手册 →MC9S08AW32VFGE
✅ 直接替换✓ 有现货
$3.3 / 个
查看数据手册 →MC908AP64CFAER528
✅ 直接替换✓ 有现货
$4.85 / 个
查看数据手册 →MC9S12C32VFAE16
✅ 直接替换✓ 有现货
$6.42 / 个
查看数据手册 →MC9S12C64MFUE
✅ 直接替换✓ 有现货
$10.2 / 个
查看数据手册 →MC68HC908JL8CFA 最大额定值与电气特性
| Core Processor | HC08 |
| Core Size | 8-bit |
| Program Memory Size | 8 KB (8K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 256 x 8 (256 bytes) |
| EEPROM Size | None |
| 最大时钟频率 | 8 MHz |
| Number of I/O | 26 |
| Connectivity | SCI (Serial Communications Interface) |
| Peripherals | LED drive, LVD, POR, PWM |
| ADC | 8-bit, on-chip |
| Oscillator Type | Internal |
| Supply Voltage Range | 3.3 V to 5 V (2.7 V to 5.5 V typical for HC08) |
| 封装 | 32-LQFP (7x7 mm) |
| 安装类型 | Surface Mount (Gull Wing) |
| 工作温度 | -40 C to +85 C (industrial) |
| Instruction Set Compatibility | M6805, M146805, M68HC05 |
MC68HC908JL8CFA 引脚配置
| 引脚 1 | IRQ — External interrupt request input |
| 引脚 2 | OSC1 — Crystal/oscillator input or external clock |
| 引脚 3 | OSC2 — Crystal/oscillator output |
| 引脚 4 | VDD — Positive supply voltage |
| 引脚 5 | VSS — Ground reference |
| 引脚 6 | RST — Reset input (active low) |
| 引脚 7 | PTD0/TxD — GPIO / SCI transmit data |
| 引脚 8 | PTD1/RxD — GPIO / SCI receive data |
| 引脚 9 | PTD2 — General-purpose I/O |
| 引脚 10 | PTD3 — General-purpose I/O |
| 引脚 11 | PTD4 — General-purpose I/O |
| 引脚 12 | PTD5 — General-purpose I/O |
| 引脚 13 | PTA0 — Port A bit 0 (ADC input) |
| 引脚 14 | PTA1 — Port A bit 1 (ADC input) |
| 引脚 15 | PTA2 — Port A bit 2 (ADC input) |
| 引脚 16 | PTA3 — Port A bit 3 (ADC input) |
| 引脚 17 | PTA4 — Port A bit 4 (ADC input) |
| 引脚 18 | PTA5 — Port A bit 5 (ADC input) |
| 引脚 19 | PTA6 — Port A bit 6 (ADC input) |
| 引脚 20 | PTA7 — Port A bit 7 (ADC input) |
| 引脚 21 | PTB0/TCLK — GPIO / Timer clock input |
| 引脚 22 | PTB1 — GPIO / PWM channel |
| 引脚 23 | PTB2 — GPIO / PWM channel |
| 引脚 24 | PTB3 — GPIO / PWM channel |
| 引脚 25 | PTB4 — GPIO |
| 引脚 26 | PTB5 — GPIO |
| 引脚 27 | PTC0 — GPIO / LED driver |
| 引脚 28 | PTC1 — GPIO / LED driver |
| 引脚 29 | PTC2 — GPIO / LED driver |
| 引脚 30 | PTC3 — GPIO / LED driver |
| 引脚 31 | PTC4 — GPIO / LED driver |
| 引脚 32 | PTC5 — GPIO / LED driver |
典型应用
MC68HC908JL8CFA 适用于 6 应用s: Consumer White Goods Control Board, Small Home Appliance Motor Control, Automotive Body Electronics Sub-Module, Industrial Sensor Hub, Simple Sensor Hub / Educational Kit, Low-End Remote-Control / IR Receiver.
Consumer White Goods Control Board
The MC68HC908JL8CFA's combination of 8 KB Flash, 256 bytes RAM, integrated ADC, PWM, and SCI in a 32-LQFP package makes it well-suited for cost-sensitive consumer appliance boards such as washing-machine sub-controllers, microwave key panels, and air-conditioner user interfaces. The internal oscillator eliminates the crystal BOM line typically required for serial communication, and the LED driver peripherals can sink the 7-segment display current directly when only a few digits are illuminated. Designs running from rectified mains via a 5V regulator see the 2.7-5.5V supply range cover all brownout conditions. Compared with newer S08 AW32 replacements, the JL8 remains attractive for cost-optimized boards already running legacy HC08 firmware.
推荐
Small Home Appliance Motor Control
For small brushed DC motors used in blenders, fans, and handheld vacuums, the MC68HC908JL8CFA's PWM channels drive low-side MOSFET gates directly through a 10-100 kHz switching frequency while the on-chip ADC samples shunt current or BEMF for soft-start and stall detection. The 8 MHz CPU08 core executes the speed-loop proportional-integral routine in well under 100 microseconds, leaving ample headroom for safety housekeeping. The 26 I/O lines easily accommodate keypad input, status LEDs, and tachometer feedback. Compared with external motor-control ASICs, the JL8-based solution adds flexibility for firmware customization without increasing the BOM beyond a few protection components.
推荐
Automotive Body Electronics Sub-Module
Inside a vehicle, simple body modules such as mirror controllers, seat-position memory, or window-lift switches historically relied on the HC08JL8 for its low cost, internal oscillator (avoiding vibration-sensitive crystals), and SCI bus for diagnostics. The 32-LQFP package is mechanically robust under thermal cycling and fits within the typical connector-mounted PCB area of 25 x 25 mm. Note that this part is NOT AEC-Q100 qualified; for AEC-Q100 body applications use the Q1-graded S08 or S12 successor. The JL8 remains acceptable for non-safety accessory retrofits where the OEM has accepted the legacy status.
推荐
Industrial Sensor Hub
Distributed analog sensor hubs in factory automation can use the MC68HC908JL8CFA as a local aggregator that reads 4-8 ADC channels, runs a calibration lookup table stored in Flash, and reports back over SCI to a central PLC. The 8 KB Flash fits typical calibration constants and a small finite-state machine for sensor health. Internal oscillator tolerance (~2-5%) is acceptable for non-precision analog channels after software calibration. The wide supply range (2.7-5.5V) accommodates 5V industrial rails and 3.3V remote-node supplies equally well.
推荐
Simple Sensor Hub / Educational Kit
Universities and training programs continue to use the MC68HC908JL8CFA on teaching boards because the HC08 instruction set is small enough to master in a single semester while still exercising real peripherals like ADC, PWM, SCI, and interrupts. Coursework projects include digital thermometers, light-controlled lamps, and stepper-motor sequencers. The 32-LQFP package is breadboard-compatible with breakout PCBs and the established CodeWarrior HC08 toolchain is still available from NXP archives. Compared with modern S08 boards, the JL8 teaching kits are far cheaper on the secondary market.
推荐
Low-End Remote-Control / IR Receiver
Handheld IR remote controllers for TVs, set-top boxes, and HVAC indoor units leverage the MC68HC908JL8CFA's low-power STOP and WAIT modes, which drop quiescent current to microampere levels for months of battery life. The 26 I/O pins drive the keypad matrix, IR LED via PWM, and status LED without external logic. Internal oscillator accuracy is sufficient for 38 kHz carrier generation after software trimming. Compared with specialty remote-controller SoCs, the JL8-based design trades slightly higher power for much greater firmware flexibility and lower unit cost in moderate volumes.
推荐
推荐产品汇总
工程参考数据： MC68HC908JL8CFA ——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 | S9S08AW32E5MPUE | MC9S08AW32MFGE | MC9S08AW32VFGE | MC908AP64CFAER528 | MC9S12C32VFAE16 | MC9S12C64MFUE |
|---|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 32-LQFP (7x7 mm) | 32-LQFP | 32-LQFP (MFGE) | 32-LQFP (VFGE) | 32-LQFP | 32-LQFP | 32-LQFP |
| Core / Architecture | HC08 (8-bit CISC) | S08 (8-bit) | S08 (8-bit) | S08 (8-bit) | HC08 (8-bit) | S12 (16-bit) | S12 (16-bit) |
| Program Memory | 8 KB Flash | 32 KB Flash | 32 KB Flash | 32 KB Flash | 64 KB Flash | 32 KB Flash | 64 KB Flash |
| RAM Size | 256 B | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 4 KB |
| Maximum Clock | 8 MHz | 40 MHz | 40 MHz | 40 MHz | 8 MHz | 25 MHz bus | 25 MHz bus |
| Number of I/O | 26 | Up to 30 | Up to 30 | Up to 30 | Up to 30 | Up to 28 | Up to 60 |
| Connectivity | SCI | SCI, SPI, I2C | SCI, SPI, I2C | SCI, SPI, I2C | SCI, SPI | SCI, SPI, CAN | SCI, SPI, CAN |
| Lifecycle Status | Obsolete | Active | Active | Active | Obsolete | Active | Active |
| Approx. Unit Price (qty 1000) | $5.40 | $2.80-$3.50 | $2.80-$3.50 | $10-$15 (obsolete) | $5-$7 | $8-$12 |
关键差异点
- True HC08 family drop-in for legacy firmware reuse （对比 S9S08AW32E5MPUE)
- Internal oscillator reduces BOM （对比 MC9S12C32VFAE16)
- Mature documentation and broad legacy support （对比 MC908AP64CFAER528)
设计说明
Estimated: at 5V supply and 8 MHz bus, the HC08JL8 draws roughly 10-15 mA active and ~1-5 uA in STOP mode. Add a 4.7 uF bulk plus a 100 nF ceramic decoupling capacitor as close as practical to each VDD/VSS pair. For battery operation, gate STOP-mode entry behind a validated external-interrupt wake source.
Keep the OSC1/OSC2 traces short (<=10 mm) and surrounded by a ground guard ring if using an external crystal. Place the RST pull-up (typically 4.7 kohm to VDD) adjacent to the MCU pin with no high-current traces routed beneath it. Avoid routing ADC analog inputs next to PWM or SCI lines to reduce coupling.
When migrating from HC08JL8 to S08AW32, several port pins change function names (e.g., TxD/RxD remain but extra SPI and I2C pins must be tri-stated at startup). Validate the MCU pin assignments against the new datasheet before authorizing layout changes. Background-debug-mode (BDM) connector pinout also differs between HC08 and S08 - do not reuse the HC08 BDM cable with an S08 board.
The internal oscillator accuracy is typically +/- 2% across 0-70 C and can drift further with voltage. For SCI baud rates above 19200 or for any CAN/USB bridge, add an external crystal or active resonator. Apply oscillator-software-trim using the manufacturer FTRIM register procedure to tighten frequency.
合规信息
MC68HC908JL8CFA is listed as End of Life / Obsolete per NXP and several distributor pages; current RoHS/REACH declarations are not present in retrieved web data (placeholder unknown). The part was originally released before the universal RoHS transition; verify with authorized aftermarket distributor Rochester Electronics before declaring compliance. Not AEC-Q100 qualified - use S08/S12 -Q1 variants for automotive.