MC68HC908LJ24CPK - 8MHz 8-bit HC08 MCU, 24KB FLASH, LCD | NXP
부품 번호: MC68HC908LJ24CPK ✗ 단종| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $8.9 | $8.90 |
| 10 | $7.95 | $79.50 |
| 100 | $6.85 | $685.00 |
| 500 | $5.95 | $2,975.00 |
| 1,000 | $5.2 | $5,200.00 |
MC68HC908LJ24CPK 개요
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (FLASH/ROM), data memory (RAM), and peripheral functions such as timers, communication controllers, ADCs, and I/O into one device. The HC08 is an 8-bit CISC core family succeeding the HC05; it executes one byte per instruction cycle and is widely used in appliance control, metering, and human-machine-interface (HMI) boards where low cost and deterministic behavior matter more than raw throughput.
Key features include 24KB FLASH program memory, 768 bytes of RAM, an 8MHz internal bus, integrated LCD driver (typically up to 4x32 segments on this family), an 8-channel 8-bit ADC, two timer/PWM modules, and serial interfaces including SCI and SPI. The on-chip LCD controller removes the need for an external driver chip, simplifying BOM and PCB area in HMI designs.
The MC68HC908LJ24CPK uses the standard HC08 CPU with a 16-bit stack pointer, hardware multiply (MUL) via the accumulator, and the well-documented HC08 instruction set. FLASH memory supports in-system programming through the standard MON08 debug/monitor interface and a serial bootloader mode, enabling field firmware updates without external programming hardware.
Typical applications include white-goods and appliance control panels (washing machines, microwave ovens, dishwashers), HVAC thermostats, metering displays, medical-device HMIs, industrial operator panels, and consumer electronics with segment-LCD displays. The integrated LCD driver is the primary reason designers choose the LJ-variant over the JL-variant.
When designing with this device, plan the VDD/VSS decoupling per HC08 layout guidelines (one 100nF per supply pair, bulk cap near the regulator) and ensure the LCD segment pins are routed away from switching traces to avoid ghost-segment artifacts. Confirm the chosen PJ/PG suffix matches your code size, since FLASH variants with the same die are available in different memory densities.
This page synthesizes distributor stock levels, parametric specifications, and engineering alternatives that go beyond the raw manufacturer datasheet, helping sourcing and design engineers evaluate the part for new designs and for legacy board replacements.
드롭인 대체품: MC68HC908LJ24CPK — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MC68HC908LJ24CPK (동일 폼 팩터 및 풋프린트) — 차이점: Program Memory Size, Series, Connectivity, Package, RAM Size.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
MC68HC908LJ24CPB
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$5.21 / 개
데이터시트 보기 →MC68HC908LJ12CPK
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MC68HC908LJ24CFK
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MC68HC908LJ24MP
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MC68HC908LJ24VPK
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MC68HC908LJ24CPK 최대 정격 & 전기적 특성
| Core Processor | HC08 |
| Core Size | 8-bit |
| Core Speed | 8 MHz |
| Program Memory Size | 24 KB (24K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 768 B |
| Number of I/O | 48 |
| Supply Voltage (Vcc/Vdd) | 3.0 V to 5.5 V |
| Connectivity | I2C, IRSCI, SPI |
| Peripherals | LCD driver, LVD, POR, PWM |
| Data Converters | A/D 8x8b |
| 패키지 | 80-LQFP (LQFP-80, 12x12 mm, surface-mount) |
| 실장 유형 | Surface Mount |
| 동작 온도 | -40 C to +85 C (industrial, suffix C) |
| Series | HC08 |
| Oscillator Type | Internal |
MC68HC908LJ24CPK 핀 구성
| 핀 1 | PTA0 — Port A bit 0 (general-purpose I/O, KBI interrupt) |
| 핀 2 | PTA1 — Port A bit 1 (general-purpose I/O) |
| 핀 3 | PTA2 — Port A bit 2 (general-purpose I/O) |
| 핀 4 | PTA3 — Port A bit 3 (general-purpose I/O) |
| 핀 5 | VDD — Positive supply (3.0-5.5 V) |
| 핀 6 | VSS — Ground reference |
| 핀 7 | PTA4 — Port A bit 4 (general-purpose I/O) |
| 핀 8 | PTA5 — Port A bit 5 (general-purpose I/O) |
| 핀 9 | PTA6 — Port A bit 6 (general-purpose I/O) |
| 핀 10 | PTA7 — Port A bit 7 (general-purpose I/O) |
| 핀 11 | PTB0 — Port B bit 0 (general-purpose I/O, ADC input) |
| 핀 12 | PTB1 — Port B bit 1 (general-purpose I/O, ADC input) |
| 핀 13 | PTB2 — Port B bit 2 (general-purpose I/O, ADC input) |
| 핀 14 | PTB3 — Port B bit 3 (general-purpose I/O, ADC input) |
| 핀 15 | PTB4 — Port B bit 4 (general-purpose I/O, ADC input) |
| 핀 16 | PTB5 — Port B bit 5 (general-purpose I/O, ADC input) |
| 핀 17 | PTB6 — Port B bit 6 (general-purpose I/O, ADC input) |
| 핀 18 | PTB7 — Port B bit 7 (general-purpose I/O, ADC input) |
| 핀 19 | PTC0 — Port C bit 0 (general-purpose I/O) |
| 핀 20 | PTC1 — Port C bit 1 (general-purpose I/O) |
| 핀 21 | PTC2 — Port C bit 2 (general-purpose I/O) |
| 핀 22 | PTC3 — Port C bit 3 (general-purpose I/O) |
| 핀 23 | PTC4 — Port C bit 4 (general-purpose I/O) |
| 핀 24 | PTC5 — Port C bit 5 (general-purpose I/O) |
| 핀 25 | PTC6 — Port C bit 6 (general-purpose I/O) |
| 핀 26 | PTC7 — Port C bit 7 (general-purpose I/O) |
| 핀 27 | PTD0 — Port D bit 0 / SPI SCK |
| 핀 28 | PTD1 — Port D bit 1 / SPI MOSI |
| 핀 29 | PTD2 — Port D bit 2 / SPI MISO |
| 핀 30 | PTD3 — Port D bit 3 / SPI SS |
| 핀 31 | PTD4 — Port D bit 4 / TxD SCI |
| 핀 32 | PTD5 — Port D bit 5 / RxD SCI |
| 핀 33 | PTD6 — Port D bit 6 (general-purpose I/O) |
| 핀 34 | PTD7 — Port D bit 7 (general-purpose I/O) |
| 핀 35 | PTE0 — Port E bit 0 (general-purpose I/O) |
| 핀 36 | PTE1 — Port E bit 1 (general-purpose I/O) |
| 핀 37 | PTE2 — Port E bit 2 (general-purpose I/O) |
| 핀 38 | PTE3 — Port E bit 3 (general-purpose I/O) |
| 핀 39 | PTE4 — Port E bit 4 (general-purpose I/O) |
| 핀 40 | PTE5 — Port E bit 5 (general-purpose I/O) |
| 핀 41 | PTE6 — Port E bit 6 (general-purpose I/O) |
| 핀 42 | PTE7 — Port E bit 7 (general-purpose I/O) |
| 핀 43 | PTF0 — Port F bit 0 (LCD segment output) |
| 핀 44 | PTF1 — Port F bit 1 (LCD segment output) |
| 핀 45 | PTF2 — Port F bit 2 (LCD segment output) |
| 핀 46 | PTF3 — Port F bit 3 (LCD segment output) |
| 핀 47 | PTF4 — Port F bit 4 (LCD segment output) |
| 핀 48 | PTF5 — Port F bit 5 (LCD segment output) |
| 핀 49 | PTF6 — Port F bit 6 (LCD segment output) |
| 핀 50 | PTF7 — Port F bit 7 (LCD segment output) |
| 핀 51 | PTG0 — Port G bit 0 (LCD backplane / segment) |
| 핀 52 | PTG1 — Port G bit 1 (LCD backplane / segment) |
| 핀 53 | PTG2 — Port G bit 2 (LCD backplane / segment) |
| 핀 54 | PTG3 — Port G bit 3 (LCD backplane / segment) |
| 핀 55 | PTG4 — Port G bit 4 (LCD backplane / segment) |
| 핀 56 | PTG5 — Port G bit 5 (LCD backplane / segment) |
| 핀 57 | PTG6 — Port G bit 6 (LCD backplane / segment) |
| 핀 58 | PTG7 — Port G bit 7 (LCD backplane / segment) |
| 핀 59 | PTH0 — Port H bit 0 (LCD segment output) |
| 핀 60 | PTH1 — Port H bit 1 (LCD segment output) |
| 핀 61 | PTH2 — Port H bit 2 (LCD segment output) |
| 핀 62 | PTH3 — Port H bit 3 (LCD segment output) |
| 핀 63 | PTH4 — Port H bit 4 (LCD segment output) |
| 핀 64 | PTH5 — Port H bit 5 (LCD segment output) |
| 핀 65 | PTH6 — Port H bit 6 (LCD segment output) |
| 핀 66 | PTH7 — Port H bit 7 (LCD segment output) |
| 핀 67 | PTJ0 — Port J bit 0 (LCD segment output) |
| 핀 68 | PTJ1 — Port J bit 1 (LCD segment output) |
| 핀 69 | PTJ2 — Port J bit 2 (LCD segment output) |
| 핀 70 | PTJ3 — Port J bit 3 (LCD segment output) |
| 핀 71 | PTJ4 — Port J bit 4 (LCD segment output) |
| 핀 72 | PTJ5 — Port J bit 5 (LCD segment output) |
| 핀 73 | PTJ6 — Port J bit 6 (LCD segment output) |
| 핀 74 | PTJ7 — Port J bit 7 (LCD segment output) |
| 핀 75 | OSC1 — Crystal oscillator input / external clock |
| 핀 76 | OSC2 — Crystal oscillator output |
| 핀 77 | RESET — Active-low reset (bidirectional, internal pull-up) |
| 핀 78 | IRQ — External interrupt request (active low) |
| 핀 79 | VREFH — ADC high reference |
| 핀 80 | VREFL — ADC low reference (tied to VSS) |
일반적인 애플리케이션
MC68HC908LJ24CPK 적합 용도: 6 애플리케이션s: White-Goods Appliance Control, HVAC Thermostat and Climate Control Panels, Industrial Metering and Energy Displays, Medical Device HMI Panels, Consumer Electronics with Segment LCD, Automotive Body and Comfort Electronics.
White-Goods Appliance Control
The MC68HC908LJ24CPK is a workhorse MCU in washing machines, dishwashers, and microwave ovens because it combines a 24KB FLASH (enough for state-machine + UI logic), a 5V-tolerant 3.0-5.5V supply that interfaces directly to triac drivers and mechanical relays, and an on-chip LCD controller that eliminates the external HT1621-class driver. With 48 I/O, the MCU can scan a 4x4 keypad, drive 7-segment or character LCD via integrated segment pins, and PWM-control a motor via the on-chip timer. The 8MHz HC08 core is sufficient for relay-debounce loops and basic PID control without DMA. Its mature MON08 monitor allows factory firmware update on the production line. Industrial designers choose this part for its BOM consolidation advantage in cost-sensitive consumer appliances where every external IC counts.
추천
HVAC Thermostat and Climate Control Panels
The MC68HC908LJ24CPK fits wall-mounted thermostats and climate-control HMI panels because its integrated segment-LCD driver directly displays setpoint temperature, mode, and fan-speed icons without an external driver. The 8-channel 8-bit ADC reads NTC thermistors and humidity sensors, while the two timer/PWM channels generate the variable-speed fan or PWM valve control. The wide 3.0-5.5V supply range lets the MCU run from a rectified 24VAC HVAC bus through a small linear regulator, simplifying the power tree. The HC08's deterministic instruction timing makes scheduling temperature-sampling and button-debounce loops straightforward in C or assembly. With 768 bytes of RAM, calibration tables, hysteresis state, and a small UI buffer all fit comfortably on-chip, removing the need for an external EEPROM.
추천
Industrial Metering and Energy Displays
Electricity meters, water meters, and gas meters frequently use the MC68HC908LJ24CPK because the integrated LCD controller drives the multi-digit segment display that shows kWh consumption, tariff, and diagnostics. The IRSCI peripheral implements an infra-red UART that supports IEC 62056-21 optical probe readout for utility meter reading without mechanical connectors. The 24KB FLASH holds metering firmware including tamper detection, calibration constants, and TOU tariff tables. The 5V-tolerant ADC measures shunt-resistor voltage and Rogowski-coil outputs. Low-power standby is critical for battery-backed or CT-powered meters, and the HC08's STOP/WAIT modes plus the on-chip LVD allow nanoampere-range sleep current while preserving RAM.
추천
Medical Device HMI Panels
The MC68HC908LJ24CPK is used in low-to-mid complexity medical HMIs such as infusion pump keypads, blood-pressure monitor displays, and patient-bedside controllers. The on-chip LCD controller drives the segment display showing pressure, dose, or patient ID; the I2C and SPI peripherals interface to sensor front-ends and to an external Wi-Fi/BLE module for telemetry. The HC08's deterministic interrupt latency is important for safety-critical timing in alarm loops. The 24KB FLASH supports IEC 62304-style firmware structure with self-test routines, and 768 bytes of RAM are enough for a small RTOS-style scheduler. NXP's long-term silicon longevity program keeps the part available for the 10-15 year lifecycle typical of medical devices.
추천
Consumer Electronics with Segment LCD
Audio receivers, kitchen scales, remote-control base stations, and small appliances use the MC68HC908LJ24CPK when they need a custom segment LCD without paying for a TFT controller. The integrated segment LCD handles up to 4 backplanes x 32 segments, enough for 16-digit numeric plus icon displays typical in clock radios and DAB+ tuners. The I2C bus talks to an external audio DAC or EEPROM, while the SPI bus drives an external Flash for logging. The 8MHz core is plenty for IR-decoding, button scanning, and basic audio-level metering. The 5V tolerance lets designers share the main analog supply with the LCD bias, reducing regulator count and BOM cost in competitive consumer markets.
추천
Automotive Body and Comfort Electronics
Within automotive body modules (door modules, climate panels, seat controllers, mirror adjusters) the MC68HC908LJ24CPK provides the 5V-tolerant I/O, integrated LCD, and 24KB FLASH that legacy 12V body-electronics designs require. The HC08 core runs the LIN slave protocol via the SCI peripheral, communicates with mirror position sensors via ADC, and drives mirror motors through PWM. The 48 I/O handle multiple switches (window up/down, lock, mirror select) and LED indicators. AEC-Q100 is NOT qualified on this part - automotive designs that need AEC-Q100 must migrate to NXP's S9S08 or Kinetis KE automotive families, but for non-safety body electronics where OEM cost dominates, the LJ24 remains common.
추천
추천 제품 요약
엔지니어링 참조 데이터: MC68HC908LJ24CPK — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MC68HC908LJ24CPB | MC68HC908LJ12CPK | MC68HC908LJ24CFK | MC68HC908LJ24MP | MC68HC908LJ24VPK |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 80-LQFP (PK) 12x12 mm | 84-PQFP | 80-LQFP - same | 80-QFP (PQFP) | 80-LQFP - same | 80-LQFP - same |
| FLASH Program Memory | 24 KB | 24 KB - same | 12 KB (-50%) | 24 KB - same | 24 KB - same | 24 KB - same |
| RAM Size | 768 B | 768 B - same | 768 B - same | 768 B - same | 768 B - same | 768 B - same |
| CPU Speed | 8 MHz | 8 MHz - same | 8 MHz - same | 8 MHz - same | 8 MHz - same | 8 MHz - same |
| LCD Driver | Yes (integrated) | Yes - same | Yes - same | Yes - same | Yes - same | Yes - same |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +125 C (extended) | -40 C to +105 C (extended) |
| Peripherals | LCD, LVD, POR, PWM, ADC 8x8b | Same peripheral set | Same peripheral set | Same peripheral set | Same peripheral set | Same peripheral set |
| Lifecycle Status | NRND | NRND - same | NRND - same | NRND - same | NRND - same | NRND - same |
주요 차별점
- Integrated segment LCD driver on-chip (vs MC68HC908JL8CFAE)
- 24KB FLASH vs 12KB mask variants (vs MC68HC908LJ12CPK)
- 80-LQFP package matches modern PCB assembly (vs MC68HC908LJ24CPB)
- 5V-tolerant wide supply range (vs MC68HC908JL8CFAE)
설계 노트
Place a 100nF ceramic decoupling capacitor as close as possible to each VDD/VSS pair on the MC68HC908LJ24CPK, with a bulk 4.7-10uF tantalum or ceramic at the regulator. The HC08 core draws short current spikes during FLASH programming and ADC conversion; insufficient decoupling causes FLASH write errors and ADC noise. Keep VREFH bypassed with 100nF to VREFL when the ADC is used - shared VDD reference will couple digital switching noise into analog readings.
The 80-LQFP package dissipates about 1W max in normal 8MHz operation. Estimated: with theta_JA of approximately 50 C/W on a 4-layer JEDEC board and 1W dissipation, junction temperature rises 50 C above ambient - design for Ta max of +70 C to keep Tj under +120 C. For continuously running applications at high ambient, add a copper pour under the LQFP body and thermal vias to the inner plane to drop theta_JA to ~30 C/W.
Route the OSC1/OSC2 traces short and symmetric, with the crystal and load capacitors within 5 mm of the MCU pins. Keep LCD segment traces (PTF/PTH/PTJ) away from switching power and PWM traces, and route them as far from the OSC pins as possible to avoid ghost-segment artifacts. Place the RESET pin pull-up (typically 4.7k) close to the MCU, and add a 1nF cap to ground for noise immunity in appliance environments.
Do not exceed 5.5 V on any pin including during inductive load switching transients - the LJ24 is a 5V part, not 5V-tolerant on top of 3.3V. When migrating from the JL8 to LJ24, confirm FLASH memory map to differ (LJ24 has more flash pages at $EC00-$F7FF region). The MON08 debug interface requires IRQ pin sharing - production boards must isolate the MON08 connector or accept that the IRQ pin cannot be used as a normal interrupt in debug mode.
규정 준수 정보
RoHS and lead-free status not explicitly stated in retrieved distributor data. The 80-LQFP (PK) package typically ships lead-free and RoHS compliant under NXP's lead-free program, but engineers must request the lot-specific compliance certificate from their supplier. Not AEC-Q100 qualified - for automotive body electronics requiring AEC-Q100, migrate to NXP S9S08 or Kinetis KE automotive families.
