MC68HC908JL8MFAE - 8KB Flash 8-Bit HC08 MCU | NXP 32-LQFP
MPN: MC68HC908JL8MFAE ✗ Cuối đờiMC68HC908JL8MFAE Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (FLASH/ROM), data memory (RAM), and peripherals (ADC, timers, communications, GPIO) on one die. Within the broader taxonomy, the MC68HC908JL8MFAE is an 8-bit MCU, belonging to the HC08 sub-family of Freescale/NXP's M68HC08 line, which itself falls under the larger category of microcontrollers -> microprocessors -> embedded processors -> semiconductors. The 'JL' suffix marks the cost-reduced, low-pin-count branch; the '08' indicates FLASH rather than ROM/EPROM.
Key features include 8 KB FLASH (8K x 8), 256 bytes RAM, an internal bus frequency of 8 MHz, an 8-bit ADC with multiple input channels, one PWM channel, an SCI (Serial Communications Interface) for UART, and an integrated LED driver, low-voltage detect (LVD), and power-on reset (POR). The part supports both SPI-style synchronous and SCI-style asynchronous serial communication, and offers mask-ROM/FLASH security via the standard HC08 security byte.
The architecture centers on a HC08 CPU core with a 16-bit stack pointer, 16-bit index register (H:X), and a fixed 8 MHz internal bus from the trimmable internal oscillator. The 8-bit ADC shares input pins with selected GPIOs, and the single PWM output is suitable for LED dimming or simple motor speed control in low-cost BLDC or DC fan implementations.
Typical applications include appliance controllers (washing machines, microwave ovens), LED lighting drivers with dimming, low-cost consumer toys, smart-meter peripherals, and any cost-sensitive 8-bit design that can leverage the mature HC08 instruction set. The 32-LQFP package provides an easy hand-solder footprint for prototyping while still being compatible with automated assembly lines.
Designers should note that this part is approaching end-of-life in NXP's roadmap and is supplied as Not For New Designs in some channels, with remaining inventory being a finite drop of legacy and authorized stock. Existing designs should validate the current longevity statement before committing to long-life programs.
This page synthesizes distributor pricing, drop-in compatible same-package alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho MC68HC908JL8MFAE — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MC68HC908JL8MFAE (cùng hình factor và footprint) — khác nhau ở Package, RAM Size, Program Memory Size, Operating Temperature, ADC.
MC68HC908JL8CFAE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC68HC908JK8CFAE
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC908JL8CFAER2
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC68HC908LJ12CFB
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC68HC908QT4VDWER
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68HC908JL8MFAE Tỷ lệ tối đa & tính chất điện
| Core Processor | HC08 |
| Core Size | 8-Bit |
| Core Speed | 8 MHz |
| Program Memory Size | 8 KB (8K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 256 x 8 bytes |
| EEPROM Size | None |
| Number of I/O | 26 |
| Peripherals | LED, LVD, POR, PWM |
| Connectivity | SCI |
| ADC | 8-bit, multi-channel |
| PWM Channels | 1 |
| Hộp | 32-LQFP (7x7 mm) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C |
| Series | HC08 |
| Part Status | Not For New Designs (per distributor listing) |
Cấu hình chân MC68HC908JL8MFAE
| Chân 1 | PTA0/TXD — GPIO Port A bit 0 / SCI transmit data |
| Chân 2 | PTA1/RXD — GPIO Port A bit 1 / SCI receive data |
| Chân 3 | PTA2 — GPIO Port A bit 2 |
| Chân 4 | PTA3 — GPIO Port A bit 3 |
| Chân 5 | VSS — Ground reference |
| Chân 6 | VDD — Positive supply voltage |
| Chân 7 | OSC1 — Oscillator input / external clock input |
| Chân 8 | OSC2 — Oscillator output |
| Chân 9 | PTA4 — GPIO Port A bit 4 |
| Chân 10 | PTA5/IRQ — GPIO Port A bit 5 / external interrupt request |
| Chân 11 | PTB0/ADC0 — GPIO Port B bit 0 / ADC channel 0 |
| Chân 12 | PTB1/ADC1 — GPIO Port B bit 1 / ADC channel 1 |
| Chân 13 | PTB2/ADC2 — GPIO Port B bit 2 / ADC channel 2 |
| Chân 14 | PTB3/ADC3 — GPIO Port B bit 3 / ADC channel 3 |
| Chân 15 | PTC0 — GPIO Port C bit 0 |
| Chân 16 | PTC1 — GPIO Port C bit 1 |
| Chân 17 | PTC2 — GPIO Port C bit 2 |
| Chân 18 | PTC3 — GPIO Port C bit 3 |
| Chân 19 | PTC4 — GPIO Port C bit 4 |
| Chân 20 | PTC5 — GPIO Port C bit 5 |
| Chân 21 | PTC6 — GPIO Port C bit 6 |
| Chân 22 | PTC7 — GPIO Port C bit 7 |
| Chân 23 | PTD0/PWM — GPIO Port D bit 0 / PWM output |
| Chân 24 | PTD1 — GPIO Port D bit 1 |
| Chân 25 | PTD2 — GPIO Port D bit 2 |
| Chân 26 | PTD3 — GPIO Port D bit 3 |
| Chân 27 | PTD4 — GPIO Port D bit 4 |
| Chân 28 | PTD5 — GPIO Port D bit 5 |
| Chân 29 | RST — Active-low external reset input |
| Chân 30 | PTD6 — GPIO Port D bit 6 |
| Chân 31 | PTD7 — GPIO Port D bit 7 |
| Chân 32 | VREF — ADC voltage reference |
Ứng dụng tiêu biểu
MC68HC908JL8MFAE phù hợp cho 6 Áp dụngs: White Goods and Appliance Controllers, LED Lighting and Dimming Controllers, Low-Cost Consumer Toys and Gadgets, Industrial Sensor and Module Interfaces, Smart Metering and Sub-Meter Peripherals, Automotive Body Electronics (Legacy).
White Goods and Appliance Controllers
The MC68HC908JL8MFAE's 8 KB FLASH, 8-bit ADC, single PWM, and 26 GPIOs fit washing-machine, dishwasher, and microwave-oven controllers where cost dominates the BOM and only a small amount of code is needed. The HC08 core runs the user interface, sensor sampling, and relay/triac timing loops at 8 MHz bus speed - more than sufficient for typical 1 ms control cycles in motor and heating systems. The 32-LQFP footprint accepts hand-solder rework and survives reflow profiles up to standard JEDEC J-STD-020 peak temperatures.
Được đề xuất
LED Lighting and Dimming Controllers
The MC68HC908JL8MFAE's dedicated LED driver peripheral and PWM channel provide direct hardware support for LED dimming without external PWM ICs. The 8-bit ADC reads ambient light sensors, potentiometers, or 0-10 V dimming signals with adequate resolution for indoor lighting feedback loops. With 8 KB FLASH, designers can implement logarithmic dimming curves, fade-in/fade-out sequences, and simple remote-control decoding for residential LED fixtures.
Được đề xuất
Low-Cost Consumer Toys and Gadgets
For battery-powered toys and consumer gadgets, the MC68HC908JL8MFAE delivers low BOM cost via integrated LED driver, ADC, and 26 GPIOs that directly drive buzzers, IR LEDs, motors, and switches. The HC08's efficient bit-manipulation instructions simplify GPIO bit-banging for protocols like NEC IR, simple UART debug output, and sensor polling. Code size fits within the 8 KB FLASH budget for typical toy logic, and the 256-byte RAM handles temporary state for animated sequences.
Được đề xuất
Industrial Sensor and Module Interfaces
The MC68HC908JL8MFAE acts as a low-cost protocol translator or sensor-conditioning module in industrial settings, using the SCI peripheral to relay sensor data to a higher-level PLC or supervisory controller. The 8-bit ADC reads 4-20 mA loop sensors via shunt resistors, and the GPIO ports drive status LEDs and digital outputs. Its -40C to +85C operating range supports most factory and outdoor cabinet installations without premium industrial-grade pricing.
Được đề xuất
Smart Metering and Sub-Meter Peripherals
For smart electricity, water, or gas metering peripherals, the MC68HC908JL8MFAE handles pulse counting from mechanical meter outputs, drives the local display multiplex, and forwards aggregated data via SCI to a central concentrator. The 8 KB FLASH accommodates tariff schedules and simple calibration tables, and the LVD (low-voltage detect) peripheral monitors the battery backup for graceful shutdown during power outages. This MCU remains a common choice for retrofit metering sub-modules in legacy field deployments.
Được đề xuất
Automotive Body Electronics (Legacy)
Although newer automotive designs use AEC-Q100 qualified S12 or S08 KEA parts, the MC68HC908JL8MFAE continues to appear in legacy automotive body controllers for interior lighting, simple seat controls, and auxiliary HVAC subsystems. Its 32-LQFP footprint tolerates the thermal environment of dashboard modules, and the HC08 tool chain remains familiar to long-tenured automotive firmware engineers. Always verify the specific lot's automotive compliance status before deploying in new vehicle programs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC68HC908JL8MFAE — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MC68HC908JL8CFAE | MC68HC908JK8CFAE | MC908JL8CFAER2 | MC68HC908LJ12CFB |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| 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 |
| Core | HC08 8-bit, 8 MHz | HC08 8-bit, 8 MHz | HC08 8-bit, 8 MHz | HC08 8-bit, 8 MHz | HC08 8-bit, 8 MHz |
| FLASH Size | 8 KB | 8 KB | 8 KB | 8 KB | 12 KB |
| RAM Size | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 512 bytes |
| GPIO Count | 26 | 26 | 26 | 26 | 26 |
| ADC | 8-bit, multi-channel | 8-bit, multi-channel | None (JK variant) | 8-bit, multi-channel | 8-bit, multi-channel |
| Lifecycle Status | EOL / Not For New Designs | EOL / Not For New Designs | EOL / Not For New Designs | EOL / Not For New Designs | EOL / Not For New Designs |
Bảo phân biệt quan trọng
- M-grade industrial temperature range (vsMC68HC908JL8CFAE)
- On-chip ADC with multiple input channels (vsMC68HC908JK8CFAE)
- More FLASH and RAM than baseline JL8 (vsMC68HC908LJ12CFB)
Ghi chú thiết kế
The MC68HC908JL8MFAE operates from a single VDD rail typically at 3.0 V to 5.5 V. Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin, with a bulk 10 uF tantalum or aluminum polymer capacitor near the supply entry point. The internal LVD (low-voltage detect) peripheral can be configured via the CONFIG register to trigger a reset when VDD drops below the safe operating threshold - always enable this for battery-backed designs.
Route the oscillator pins (OSC1/OSC2) with short, parallel traces surrounded by ground to minimize EMI pickup. If using the internal trimmable oscillator instead, leave OSC2 floating or tie to VSS through a small resistor per the family datasheet. Place the RESET pin pull-up resistor (typically 4.7 kohm) close to the IC to keep the rise time under 100 us and avoid spurious resets during power-up.
Do not confuse the M-suffix (industrial temperature -40C to +85C) with the C-suffix parts - the C variants often specify a narrower temperature window unsuitable for outdoor or automotive environments. The 8-bit ADC reference (VREF) pin MUST be connected to a stable reference or VDD; floating VREF causes wildly inaccurate ADC readings. Finally, the 8 KB FLASH is in-application programmable but requires the proper monitor ROM unlock sequence - never write to FLASH without consulting the family reference manual to avoid accidental security-byte lockout.
Thông tin tuân thủ
Compliance flags not explicitly stated in the provided distributor listings. Verify lot-level RoHS/REACH/lead-free status with the distributor or by lot trace code. This legacy HC08 part is generally not AEC-Q100 qualified - consult NXP automotive-grade part numbers for vehicle applications.