MCR908JL3ECDWE - HC08 8-Bit 8MHz 4KB Flash MCU | NXP SOIC-28
부품 번호: MCR908JL3ECDWE ⚠ 최종 구매| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $8.42 | $8.42 |
| 10 | $7.55 | $75.50 |
| 100 | $6.2 | $620.00 |
| 500 | $5.18 | $2,590.00 |
| 1,000 | $4.45 | $4,450.00 |
MCR908JL3ECDWE 개요
An 8-bit microcontroller (MCU) is a single-chip computer containing a processor core, non-volatile program memory (Flash or ROM), volatile working memory (RAM), and a set of peripheral interfaces such as timers, serial ports, and analog-to-digital converters. The HC08 architecture is a CISC (Complex Instruction Set Computer) variant of the Motorola/Freescale M68HC08 family, which succeeded the older HC05 and HC11 families and added Background Debug Mode (BDM), a configurable system clock, and improved low-power modes. MCUs of this generation sit one tier below 32-bit ARM Cortex-M parts in computational capability, but excel in deterministic interrupt response, ultra-low unit cost, and a small code footprint in C or assembly.
Key features of the MCR908JL3ECDWE include 4KB of embedded Flash for application and bootloader storage, an internal 8 MHz oscillator, 128 bytes of RAM (per the JL3 family datasheet), an internal timer with multiple channels, and a serial communications interface. The 28-pin SOIC wide-body package exposes all digital I/O, supply, ground, reset, IRQ, and oscillator pins along the two long sides of the IC. The HC08JL3 is the lowest-memory member of the JL family, intended for applications where a small, well-defined program can replace discrete logic or analog control.
Typical applications include low-cost appliance controls, simple sensor signal conditioning, fan and pump controllers, remote-control transmitters, battery chargers, and small user-interface boards with LED or seven-segment displays. The wide 3.3V/5V supply tolerance allows direct connection to either common logic-rail systems in legacy industrial designs. The 8 MHz CPU clock provides enough processing headroom for sensor reading, basic state-machine control, and serial protocol handling (SCI/SPI) without external clocking.
When designing with the MCR908JL3ECDWE in a new system, note that the ROM/prefix-coded variant cannot be reprogrammed by the user. For prototyping or low-volume production, the Flash-based MC908JL3ECDWE sibling is preferred because it supports in-circuit reprogramming via the BDM interface. Engineer also notes that this part has reached End of Life - long-term designs should evaluate the KEAZ, S08, or S12K successors from NXP, although they require different packages and toolchains.
This page synthesizes distributor pricing, drop-in same-family alternatives, comparison data with siblings MC908JL3ECDWE and MC908JK3ECDWE, and practical design guidance not aggregated on the manufacturer product page, helping engineers verify replacement options for an EOL part.
드롭인 대체품: MCR908JL3ECDWE — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MCR908JL3ECDWE (동일 폼 팩터 및 풋프린트) — 차이점: Package, Core Architecture, Product Type, Data Bus Width, Family.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
MC908JL3ECDWE
✅ 드롭인✓ 재고 있음
$6.0657 / 개
데이터시트 보기 →MC908JK3ECDWE
✅ 드롭인✓ 재고 있음
$4.78 / 개
데이터시트 보기 →MC908JL8CDWE
✅ 드롭인✓ 재고 있음
$5.45 / 개
데이터시트 보기 →MCR908JL3EMDWE
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MC68HC908JL3CFB
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MCR908JL3ECDWE 최대 정격 & 전기적 특성
| Product Type | Microcontroller (MCU) |
| Core Architecture | HC08 (M68HC08 Family, CISC) |
| 데이터 버스 폭 | 8-bit |
| CPU Clock Speed | 8 MHz |
| Program Memory | 4 KB Flash (MCR indicates ROM/prefix-coded) |
| 공급 전압 | 3.3 V / 5 V |
| 패키지 | 28-pin SOIC W (wide-body, 7.5 mm body width) |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant (PB-FREE FINISHED GOODS per datasheet) |
| Lead-Free | Yes |
| Family | HC08JL Family (JL3 member) |
| Programmable | No - ROM/prefix-coded (MCR variant) |
| Debug Interface | Background Debug Mode (BDM) |
MCR908JL3ECDWE 핀 구성
| 핀 1 | IRQ — External interrupt request input |
| 핀 2 | PTA0 — Port A bit 0 / general-purpose I/O |
| 핀 3 | PTA1 — Port A bit 1 / general-purpose I/O |
| 핀 4 | PTA2 — Port A bit 2 / general-purpose I/O |
| 핀 5 | PTA3 — Port A bit 3 / general-purpose I/O |
| 핀 6 | PTA4 — Port A bit 4 / general-purpose I/O |
| 핀 7 | PTA5 — Port A bit 5 / general-purpose I/O |
| 핀 8 | PTA6 — Port A bit 6 / general-purpose I/O |
| 핀 9 | PTA7 — Port A bit 7 / general-purpose I/O |
| 핀 10 | VSS — Ground |
| 핀 11 | VDD — Supply voltage (3.3V/5V) |
| 핀 12 | OSC1 — Crystal oscillator input |
| 핀 13 | OSC2 — Crystal oscillator output |
| 핀 14 | BKGD — Background Debug Mode data |
| 핀 15 | RST — Reset input (active low) |
| 핀 16 | PTB0 — Port B bit 0 / general-purpose I/O |
| 핀 17 | PTB1 — Port B bit 1 / general-purpose I/O |
| 핀 18 | PTB2 — Port B bit 2 / general-purpose I/O |
| 핀 19 | PTB3 — Port B bit 3 / general-purpose I/O |
| 핀 20 | PTB4 — Port B bit 4 / general-purpose I/O |
| 핀 21 | PTB5 — Port B bit 5 / general-purpose I/O |
| 핀 22 | PTC0 — Port C bit 0 / general-purpose I/O |
| 핀 23 | PTC1 — Port C bit 1 / general-purpose I/O |
| 핀 24 | PTC2 — Port C bit 2 / general-purpose I/O |
| 핀 25 | PTC3 — Port C bit 3 / general-purpose I/O |
| 핀 26 | PTC4 — Port C bit 4 / general-purpose I/O |
| 핀 27 | PTC5 — Port C bit 5 / general-purpose I/O |
| 핀 28 | Vtst — Test mode power pin (factory) |
일반적인 애플리케이션
MCR908JL3ECDWE 적합 용도: 7 애플리케이션s: Low-Cost Appliance Control Board, Industrial Sensor Signal Conditioning, Remote Control and Consumer Key-Fob Transmitter, Battery Charger Controller, User Interface Board with LED / 7-Segment Display, Small Fan and Pump Motor Controller, Legacy Automotive Interior Lighting Module.
Low-Cost Appliance Control Board
The MCR908JL3ECDWE targets sub-$5 BOM microcontroller sockets on white-goods and small-appliance control boards, where its 4KB Flash and 8 MHz HC08 core provide just enough headroom for a sensor-read/state-machine/few-output loop. According to the HC08JL3 family datasheet typical applications, this part integrates a multi-channel timer for triac/relay zero-cross control plus an SCI port for UART communication with a host display, eliminating a separate timer IC. The 3.3V/5V single supply simplifies power-tree design when the same board also drives 5V logic gates. Legacy washing-machine and microwave controllers continue to use this MCU family because the ROM-coded variant protects firmware from reverse engineering.
추천
Industrial Sensor Signal Conditioning
For low-bandwidth industrial sensor signal conditioning (thermostats, pressure switches, flow meters), the MCR908JL3ECDWE provides 8-bit ADC sampling of analog sensor inputs and digital I/O control of solenoid drivers, all from a single 3.3V or 5V rail. According to distributor data from Utmel, the JL3 integrates at least one timer pulse-width-modulation channel suitable for driving proportional valves. The 28-SOIC W wide-body package offers strong solder-joint reliability for industrial temperature-cycling environments, while ROM-coded parts prevent field tampering with calibration data - important for safety-critical pressure-limit switches.
추천
Remote Control and Consumer Key-Fob Transmitter
The MCR908JL3ECDWE serves as the encoder ASIC in simple remote-control key-fobs and consumer transmitters, where its 4KB Flash holds the RF protocol state machine and button matrix de-bounce logic. According to the HC08JL3 family datasheet, the part includes a low-power wait mode with current consumption low enough that a coin-cell can power the fob for the product lifetime. The internal 8 MHz oscillator avoids an external crystal, keeping the BOM small. ROM-coded (MCR) variants are preferred here because the button-press pattern and RF ID need not change in the field.
추천
Battery Charger Controller
In lead-acid or NiMH battery charger controllers, the MCR908JL3ECDWE monitors voltage/current through its ADC and switches the charge FET via its timer/PWM channels. The 3.3V/5V supply operation matches a single-cell Li-ion or multi-cell NiMH pack post-regulator output, and the HC08 core's predictable interrupt latency allows precise timing of charge-cycle state transitions. According to the JL3 family datasheet, the chip's ROM-coded variant protects the proprietary charging algorithm from being copied. The 28-SOIC W footprint handles the modest power dissipation with normal board copper pour, no heatsink required.
추천
User Interface Board with LED / 7-Segment Display
Front-panel UI boards for microwave ovens, exercise equipment, or industrial HMIs use the MCR908JL3ECDWE to multiplex a 4-digit 7-segment display plus matrix-scanned keypad. According to Utmel comparison data, the JL3 has enough digital I/O pins and timer channels to drive a typical 8-digit display without external drivers. ROM-coded firmware ensures that the display driver, key-debounce, and serial-link protocol are locked at production. The 28-SOIC W package's wide-body footprint gives mechanical robustness against the connector flexing that occurs with repeated user input.
추천
Small Fan and Pump Motor Controller
Single-phase AC fan and small pump motor controllers use the MCR908JL3ECDWE as the timing and zero-cross-detection controller, with the high-voltage triac driven by the MCU's timer output and the mains frequency measured via a digital input. The 8 MHz core is more than fast enough for the simple PID loop and zero-cross timing logic, and the internal oscillator avoids the cost of a crystal for sub-100W motor applications. According to the HC08JL3 family typical-applications section, the ROM-coded variant is widely used in HVAC blower controllers where the firmware is stable and certified at the appliance level.
추천
Legacy Automotive Interior Lighting Module
Some 2000s-era interior lighting modules (dome-light dimmers, ambient-light controllers) still use the MCR908JL3ECDWE or its Flash sibling as the timer/PWM brain, where its industrial temperature rating and predictable interrupt response are sufficient for non-safety-critical comfort features. According to NXP cross-reference information, new automotive designs have moved to the S08/S12 KEAZ families, but the part continues to be specified for aftermarket replacement boards where matching the original pinout preserves the harness. End-of-life supply is handled by specialist distributors like Rochester Electronics.
추천
추천 제품 요약
엔지니어링 참조 데이터: MCR908JL3ECDWE — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MC908JL3ECDWE | MC908JK3ECDWE | MC908JL8CDWE | MCR908JL3EMDWE | MC68HC908JL3CFB |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 28-SOIC W | 28-SOIC W - same | 28-SOIC W - same | 28-SOIC W - same | 28-SOIC - same | 28-SOIC - same |
| Program Memory | 4 KB Flash (ROM-coded) | 4 KB Flash (user-programmable) | 4 KB Flash (JK peripheral subset) | 8 KB Flash (double size, JL family) | 4 KB Flash (industrial temp grade) | 4 KB Flash (Flash + CAN variant) |
| CPU Speed | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| User-Programmable | No (MCR = ROM-coded) | Yes (Flash) | Yes (Flash) | Yes (Flash) | No (ROM-coded) | Yes (Flash) |
| Family | HC08JL3 | HC08JL3 | HC08JK3 | HC08JL8 | HC08JL3 (extended temp) | HC08JL3 (with CAN) |
| Supply Voltage | 3.3V / 5V | 3.3V / 5V | 3.3V / 5V | 3.3V / 5V | 3.3V / 5V | 3.3V / 5V |
| Lifecycle Status | Last-Time-Buy (EOL) | Last-Time-Buy (EOL) | Active (legacy) | Active (legacy) | Last-Time-Buy (EOL) | Active (legacy) |
주요 차별점
- Factory ROM-coded (MCR variant) - firmware is locked at production for IP protection (vs MC908JL3ECDWE)
- Smallest-cost MCU in the HC08JL family at 4KB Flash (vs MC908JL8CDWE)
- JL-family full peripheral set vs JK-family subset (vs MC908JK3ECDWE)
- Mature NXP HC08 architecture with abundant legacy development tool support (vs Modern S08 / S12 KEAZ parts)
설계 노트
The MCR prefix indicates a factory-ROM-coded device - the program memory cannot be erased or rewritten by the user. According to the NXP datasheet, the BDM (Background Debug Mode) interface is present but intended only for factory test on the MCR variant; designers must select the MC908JL3ECDWE sibling if in-circuit programming is required. Confirming this distinction before PCB layout prevents the costly mistake of locking firmware into a device that cannot be re-flashed when bugs surface.
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 11), with a 10 uF bulk capacitor at the board supply entry. The HC08 core draws sharp current pulses on each internal bus-cycle clock edge - inadequate decoupling causes erratic ADC readings and unstable oscillator behavior. For battery-powered applications, configure the JL3's WAIT and STOP low-power modes via the CONFIG register and use the IRQ pin (pin 1) as the only wake-up source to minimize quiescent current.
Keep the OSC1/OSC2 traces (pins 12-13) short and symmetric, surrounded by a ground guard ring. The internal oscillator option eliminates the crystal but, when a crystal is used, the trace layout determines frequency accuracy and EMI behavior. Route the RST line (pin 15) away from the PTA/PTB digital outputs to avoid injecting switching noise into the reset network; include a 10 kohm pull-up to VDD and a 100 nF capacitor to VSS for a debounced reset.
At 8 MHz CPU clock and 5 V supply, the HC08JL3 core draws only a few mA active and well under 1 mA in WAIT mode, so thermal dissipation in the 28-SOIC W package is negligible (junction temperature rise is dominated by ambient, not self-heating). No heatsink or thermal-via array is required. However, in high-ambient industrial enclosures, derate the part per the operating-temperature range in the datasheet.
규정 준수 정보
PB-FREE FINISHED GOODS per datasheet; RoHS compliant. No automotive AEC-Q100 qualification - this part targets industrial and consumer markets. Halogen-free status not explicitly stated in the verified sources and is marked unknown.
