MC908JK1ECDWE - 8-bit HC08 MCU 1.5KB Flash 8MHz 20-SOIC | NXP
部品番号: MC908JK1ECDWE ⚠ ラストタイムバイ| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $7.32 | $7.32 |
| 10 | $6.85 | $68.50 |
| 100 | $6.1 | $610.00 |
| 500 | $5.4 | $2,700.00 |
| 1,000 | $4.75 | $4,750.00 |
MC908JK1ECDWE 概要
What is an HC08 microcontroller? An HC08 (also written HC908 or HCS08 family predecessor) is a low-cost, high-performance 8-bit CISC microcontroller architecture originally developed by Motorola and continued by NXP/Freescale. The HC08 family uses a customer-specified integrated circuit (CSIC) design strategy, meaning memory sizes, peripherals and package options are configurable per family member. The HC908JK sub-family is the entry-level, small-package tier targeting cost-sensitive, low-pin-count embedded applications in appliance control, lighting, sensors, and human-interface devices.
Key features of the MC908JK1ECDWE include 1.5 KB Flash with security, 128 bytes RAM, 8-channel 8-bit ADC, 14 general-purpose I/O pins, two 16-bit timers, a computer-operating-properly (COP) watchdog, low-voltage reset, and an external interrupt. The device operates from 3.0V to 5.5V and is qualified for -40C to +85C industrial temperature range.
The HC08JK/JL families are based on an enhanced M68HC08 CPU08 core that supports 16 addressing modes and a multiply/accumulate-like instruction set. The on-chip Flash provides in-system programmability and security, enabling field firmware updates and IP protection. The integrated ADC with 8 analog channels allows direct sensor interfacing without external components.
Typical applications include appliance control boards, white goods and HVAC controls, simple motor drives, smart lighting controllers, battery chargers, security keypads, sensor signal conditioning, and general-purpose low-cost embedded control.
When designing with this device, pay attention to the supply voltage range (3.0V to 5.5V) and decoupling requirements. Place a 100 nF decoupling capacitor close to each VDD pin. For ADC accuracy, add an RC filter on analog inputs and ensure the analog supply is well-bypassed.
This page synthesizes NXP distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: MC908JK1ECDWE — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: MC908JK1ECDWE （同一形状・フットプリント） — 相違点: Package, Program Memory Size, Core, Core Architecture, RAM Size.
クイック比較ツール — 並列比較する代替部品を選択:
MC68HC908JK1CDWE
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC68HC908JK1CDWE2
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC908JK3ECDWE
✅ ドロップイン✓ 在庫あり
$4.78 / 個
データシートを見る →MC908QL3CDWE
✅ ドロップイン✓ 在庫あり
$6.2 / 個
データシートを見る →MC68HC908JK3CDWE
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MC68HC908JK8CDWE
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MC908JK1ECDWE 最大定格＆電気的特性
| Manufacturer | NXP Semiconductors (formerly Freescale) |
| Series | HC08JK |
| Core | CPU08 (HC08 CISC) |
| データバス幅 | 8 bit |
| 最大クロック周波数 | 8 MHz |
| Program Memory Size | 1.5 KB Flash |
| RAM Size | 128 B |
| ADC | 8-channel 8-bit |
| 電源電圧 | 3.0 V to 5.5 V |
| 動作温度 | -40 C to +85 C |
| I/O Pins | 14 |
| Timers | 2 x 16-bit |
| Watchdog | COP (Computer Operating Properly) |
| パッケージ | 20-SOIC (SO-20W, 7.50 mm width) |
| 実装タイプ | Surface Mount |
MC908JK1ECDWE ピン構成
| ピン 1 | IRQ — External interrupt request input |
| ピン 2 | PTA0/ADC0 — GPIO / ADC channel 0 |
| ピン 3 | PTA1/ADC1 — GPIO / ADC channel 1 |
| ピン 4 | PTA2/ADC2 — GPIO / ADC channel 2 |
| ピン 5 | PTA3/ADC3 — GPIO / ADC channel 3 |
| ピン 6 | PTA4/ADC4 — GPIO / ADC channel 4 |
| ピン 7 | PTA5/ADC5 — GPIO / ADC channel 5 |
| ピン 8 | PTA6/ADC6 — GPIO / ADC channel 6 |
| ピン 9 | PTA7/ADC7 — GPIO / ADC channel 7 |
| ピン 10 | VSS — Ground |
| ピン 11 | PTB0/TCH0 — GPIO / Timer channel 0 |
| ピン 12 | PTB1/TCLK — GPIO / Timer clock input |
| ピン 13 | PTB2 — GPIO |
| ピン 14 | PTB3 — GPIO |
| ピン 15 | PTB4 — GPIO |
| ピン 16 | PTB5 — GPIO |
| ピン 17 | PTB6 — GPIO |
| ピン 18 | PTB7 — GPIO |
| ピン 19 | RESET — Reset input (active low) |
| ピン 20 | VDD — Positive supply voltage |
主な用途
MC908JK1ECDWE の用途: 7 件s: Appliance Control Board, HVAC Thermostat and Climate Control, Smart Lighting and LED Driver Controller, Battery Charger and Power Management Controller, Security Keypad and Access Control Panel, Industrial Sensor Signal Conditioning, General-Purpose Low-Cost Embedded Control.
Appliance Control Board
The MC908JK1ECDWE's 1.5 KB Flash, 128 B RAM, 14 GPIOs, and 8-channel 8-bit ADC make it ideal for low-cost appliance control boards such as washing machine control panels, dishwasher user interfaces, microwave oven controllers, and refrigerator temperature displays. The HC08 CPU08 core runs at 8 MHz, providing sufficient instruction throughput for keypad scanning, sensor reading, relay driving, and basic state-machine control. The integrated ADC eliminates the need for an external A/D chip, reducing BOM cost. Per NXP application guidance, the part operates from 3.0V-5.5V, allowing direct interface with 5V relays and triacs.
おすすめ
HVAC Thermostat and Climate Control
The MC908JK1ECDWE's 8-channel 8-bit ADC and industrial temperature range (-40C to +85C) suit it well for HVAC thermostat, fan controller, and zone-valve actuator designs. The 14 GPIO pins handle keypad input, LCD segment driving, relay/triac output, and serial communication to remote sensors. The HC08's deterministic interrupt response and on-chip COP watchdog enable reliable long-term unattended operation. Per the NXP datasheet, the part's low-voltage-reset circuit ensures clean startup after brownout events common in HVAC line-powered systems.
おすすめ
Smart Lighting and LED Driver Controller
The MC908JK1ECDWE drives smart-lighting controllers, dimmer circuits, and LED driver controllers with PWM outputs from its two 16-bit timer channels. The 8 MHz CPU08 core executes dimming curves, color-mixing algorithms, and DMX-512-like protocols in real time. The 1.5 KB Flash stores lighting scenes, ramp tables, and color presets. Per NXP, the 14 GPIOs handle zero-cross detection, TRIAC gate drive, button inputs, and status LEDs, while the 8-bit ADC reads ambient light sensors for daylight harvesting.
おすすめ
Battery Charger and Power Management Controller
The MC908JK1ECDWE serves as a low-cost charger controller for lead-acid, NiCd, NiMH, and Li-ion battery packs. Its 8-bit ADC monitors battery voltage, charge current, and temperature thermistor values, while the COP watchdog and timer interrupts implement charge-state timing. Per the NXP datasheet, the 3.0V-5.5V supply range allows direct 3-cell NiMH or single-cell Li-ion operation without level shifting. The 14 GPIOs drive charge/ discharge FETs, status LEDs, and safety relay cutoffs.
おすすめ
Security Keypad and Access Control Panel
The MC908JK1ECDWE is well suited for security keypad, RFID reader controller, and access-control panel designs where compact code footprint, deterministic response, and low cost matter most. The 1.5 KB Flash stores PIN validation logic, encrypted credential data, and lock-release debounce timers. The 14 GPIOs drive matrix keypads, piezo buzzers, electromagnetic locks, and Wiegand interface lines to card readers. Per NXP, the on-chip Flash security feature prevents firmware IP from being read out, protecting access-control algorithms.
おすすめ
Industrial Sensor Signal Conditioning
The MC908JK1ECDWE conditions and linearizes analog signals from thermocouples, RTDs, strain gauges, and 4-20 mA current loops in industrial sensor-transmitter designs. The 8-channel 8-bit ADC samples multiple sensor inputs while the COP watchdog ensures fault recovery. Per NXP, the 8-bit resolution is adequate for process-control applications with 1% accuracy requirements (e.g., tank-level, flow-rate, or temperature monitoring). The 20-SOIC wide-body package tolerates industrial PCB temperature swings and is easy to hand-prototype.
おすすめ
General-Purpose Low-Cost Embedded Control
The MC908JK1ECDWE serves as a general-purpose low-cost 8-bit MCU for toys, educational electronics, hobby robotics, and consumer gadgets where BOM cost is paramount. The 1.5 KB Flash, 128 B RAM, 14 GPIOs, and ADC provide enough capability for sensor fusion, motor PWM, LED animation, and serial communication. Per the NXP datasheet, the part's HC08 CISC instruction set and 16 addressing modes deliver good code density, allowing more functionality per byte of Flash. The 20-SOIC package is breadboard-friendly via SOIC-to-DIP adapters.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MC908JK1ECDWE — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MC68HC908JK1CDWE | MC68HC908JK1CDWE2 | MC908JK3ECDWE | MC908QL3CDWE |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 20-SOIC (SO-20W) | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same |
| Core | HC08 CPU08 CISC 8-bit | HC08 CPU08 CISC 8-bit | HC08 CPU08 CISC 8-bit | HC08 CPU08 CISC 8-bit | HC08 CPU08 CISC 8-bit |
| Max Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Program Memory | 1.5 KB Flash | 1.5 KB Flash | 1.5 KB Flash | 4 KB Flash | 4 KB Flash |
| RAM | 128 B | 128 B | 128 B | 128 B | 128 B |
| ADC | 8-ch 8-bit | 8-ch 8-bit | 8-ch 8-bit | 12-ch 8-bit | 10-ch 8-bit |
| Supply Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 2.7 V to 5.5 V |
| Lifecycle | Last-time-buy (EOL) | Obsolete / last-time-buy | Obsolete / last-time-buy | Last-time-buy | Last-time-buy |
主な差別化要因
- Compact 20-SOIC package with full HC08 peripheral set （vs MC68HC908JK1CDWE)
- 1.5 KB Flash upgrade path to 4 KB same-package JK3 variant （vs MC908JK3ECDWE)
- Industrial-grade temperature range with on-chip LVR and COP （vs PIC16F876A (28-pin competitor))
設計ノート
The MC908JK1ECDWE requires a clean 3.0V-5.5V supply rail. Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 20), with a 10 uF bulk capacitor on the same supply node within 1 cm. Per the NXP datasheet, the on-chip low-voltage-reset (LVR) circuit holds the part in reset when VDD drops below the LVR threshold, eliminating the need for external POR circuitry. For noisy industrial supplies, add a ferrite bead or pi-filter (LC) between the upstream regulator and VDD.
Route the RESET pin (pin 19) away from high-frequency switching nodes and adjacent to a 10 kohm pull-up resistor. The 20-SOIC wide-body footprint allows generous trace widths for power pins; use at least 0.5 mm traces for VDD/VSS. Place the ADC reference decoupling capacitor (1 nF ceramic) within 5 mm of the analog supply. For ADC accuracy, keep analog input traces short and guarded by ground pours to minimize digital switching noise coupling.
Do not exceed absolute maximum supply voltage of 6.0V on VDD, or the part will suffer permanent damage. Ensure unused GPIO pins are configured as outputs (not floating inputs) to avoid spurious interrupt wake-ups. When using the ADC, allow at least 10 us acquisition time between channel switching and conversion start, or sample-hold settling will degrade accuracy. Per NXP, programming the Flash requires the proper BDM clock frequency; verify the programmer settings match the bus frequency (8 MHz internal / divided external).
The HC08 CPU08 core generates significant edge-rate noise on GPIO transitions during port writes. When the part interfaces with analog sensors via the ADC, insert 100 ohm series resistors on digital GPIO traces near the MCU to dampen ringing. For ADC channels adjacent to high-frequency digital lines, use ground traces as shields between the analog and digital sections. The on-chip ADC has a typical input leakage of <100 nA at 25C, allowing direct connection to high-impedance sensor dividers without buffers.
コンプライアンス情報
Compliance information not explicitly listed in the verified web data; the NXP product page does not provide current RoHS/REACH declarations for this EOL part. Industrial temperature grade -40C to +85C is confirmed by datasheet. AEC-Q100 is not applicable - this is a general industrial MCU, not automotive-qualified.
