MC908JK3ECDWE - 8-bit HC08 MCU 4KB Flash SOIC-20 | NXP
MPN: MC908JK3ECDWE ⚠ Lần mua cuốiMC908JK3ECDWE Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory (Flash/ROM), working memory (RAM), and a mix of peripherals such as timers, communication controllers, and ADCs. The M68HC08 architecture succeeded the earlier M68HC05 as Freescale's (now NXP's) mainstream 8-bit core, improving on its predecessor with a wider instruction set, an indexable stack pointer, and richer addressing modes. Microcontrollers sit in the broader taxonomy of embedded processors -> microcontrollers -> 8-bit MCUs -> CISC MCUs.
Key differentiating features of the MC908JK3ECDWE include 4 KB of in-application re-programmable Flash for firmware storage, 128 B of RAM for volatile data, an on-chip multi-channel ADC for analog sensing, and an integrated clock generator that accepts an external crystal or ceramic resonator. The 20-pin SOIC package gives designers 15 to 17 usable general-purpose I/O pins depending on oscillator configuration, sufficient for keypad, sensor, and small-motor control interfaces. The device also includes a low-voltage inhibit (LVI) module and a computer-operating-properly (COP) watchdog for brown-out and code-lockup protection.
The HC08 JK/JL sub-family uses a two-stage instruction pipeline and supports both Flash and ROM program-memory variants. Production silicon runs in a mature CMOS process, which yields very low active current consumption (typically a few mA at full speed) and sub-microamp standby currents, enabling battery-backed or energy-harvested applications. Unlike 32-bit ARM Cortex-M parts, the HC08 executes instructions in 2 to 5 bus cycles without hardware division, trading raw performance for predictable deterministic interrupt latency and very small die area.
Typical applications for this MCU include appliance control boards, low-cost remote controls, sensor signal conditioning front ends, simple motor-driver sequencers, and battery-management monitor ICs in disposable products. Because the part is End-of-Life (EOL) per the NXP product discontinuance notice, new designs should plan for a verified drop-in replacement (see alternatives below) or migrate to the S08 or Kinetis E-series families for ongoing production.
When designing with this part, provide a clean 2.7 V to 3.3 V supply with adequate bulk decoupling (4.7 uF + 0.1 uF) near the VDD/VSS pins and a stable external resonator on OSC1/OSC2. In-system Flash programming requires the IRQ pin to be held in the proper state; consult the NXP datasheet for the exact monitor-mode entry sequence before committing to this MCU in new designs.
Bộ thay thế dễ dàng lắp đặt cho MC908JK3ECDWE — 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 MC908JK3ECDWE (cùng hình factor và footprint) — khác nhau ở Package, Supply Voltage, Program Memory Size, RAM Size, Core Architecture.
MCR908JK3ECDWE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MCR908JK3EMDWE
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68HRC908JK3CDW
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908JK1ECDWE
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MC908JK3EMDWE
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →S9S08AW60E5MFGE
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MC908JK3ECDWE Tỷ lệ tối đa & tính chất điện
| Core Architecture | M68HC08 (8-bit CISC) |
| Sub-Family | HC908JK / HC908JL |
| Bề rộng đường dữ liệu | 8 bit |
| Tần số xung maksimum | 8 MHz |
| Program Memory | 4 KB Flash (4K x 8) |
| RAM | 128 B (128 x 8) |
| On-Chip ADC | Yes (multi-channel) |
| Supply Voltage - Operating | 2.7 V to 3.3 V |
| Hộp | 20-pin SOIC (SO-20, 300 mil) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40 C to +85 C |
| Number of I/O Pins | Up to 17 GPIO |
| Watchdog / COP | Yes (COP watchdog timer) |
| Low-Voltage Inhibit (LVI) | Yes |
Cấu hình chân MC908JK3ECDWE
| Chân 1 | IRQ — External interrupt / RESET request (active low) |
| Chân 2 | PTA0 — Port A bit 0 / ADC channel 0 |
| Chân 3 | PTA1 — Port A bit 1 / ADC channel 1 |
| Chân 4 | VDD — Power supply (2.7 V - 3.3 V) |
| Chân 5 | VSS — Ground |
| Chân 6 | OSC1 — Crystal / ceramic resonator input |
| Chân 7 | OSC2 — Crystal / ceramic resonator output |
| Chân 8 | PTC0 — Port C bit 0 / timer channel |
| Chân 9 | PTC1 — Port C bit 1 / timer channel |
| Chân 10 | PTC2 — Port C bit 2 / timer channel |
| Chân 11 | PTC3 — Port C bit 3 / timer channel |
| Chân 12 | PTC4 — Port C bit 4 / timer channel |
| Chân 13 | PTC5 — Port C bit 5 / timer channel |
| Chân 14 | PTC6 — Port C bit 6 / timer channel |
| Chân 15 | PTC7 — Port C bit 7 / timer channel |
| Chân 16 | PTB0 — Port B bit 0 / ADC channel |
| Chân 17 | PTB1 — Port B bit 1 / ADC channel |
| Chân 18 | PTB2 — Port B bit 2 / ADC channel |
| Chân 19 | PTB3 — Port B bit 3 / ADC channel |
| Chân 20 | RST — Reset input (active low) / test mode entry |
Ứng dụng tiêu biểu
MC908JK3ECDWE phù hợp cho 7 Áp dụngs: Consumer Appliance Control Boards, Battery-Powered Sensor Hubs, Remote Control / IR Transmitter MCU, Industrial Sensor Signal Conditioning, Automotive Body Electronics (Auxiliary), Small Motor / Fan Speed Controllers, Smart Home Edge Nodes.
Consumer Appliance Control Boards
The MC908JK3ECDWE's 4 KB Flash, 128 B RAM, on-chip ADC, and 17 GPIO pins make it a strong fit for low-cost appliance control boards where deterministic 8-bit performance is sufficient. Its 2.7-3.3 V supply matches single Li-ion or 3.3 V regulator rails common in white goods. The COP watchdog and LVI module protect against firmware lockup during brown-out events typical in motor-driven appliances, and the SOIC-20 package survives standard wave-solder or hand-rework processes for low-volume runs.
Được đề xuất
Battery-Powered Sensor Hubs
The HC08 JK core's low active current and sub-microamp standby make the MC908JK3ECDWE well suited to battery-powered sensor hubs that wake briefly to measure, then sleep. The 8-channel-capable on-chip ADC reads temperature, voltage, and resistive sensors directly without external converters. Operating voltage 2.7-3.3 V matches two alkaline or a single Li-ion cell, and the integrated LVI prevents firmware corruption when cells deplete. The 17 GPIO lines are sufficient for I2C/SPI sensor buses plus LED status indicators.
Được đề xuất
Remote Control / IR Transmitter MCU
The MC908JK3ECDWE suits low-cost IR remote controls thanks to its 8 MHz core (enough for 38 kHz carrier modulation), 4 KB program space (fits RC5/RC6/SIRC firmware tables), and abundant GPIO for keypad matrix scanning. Its wide operating temperature range (-40 C to +85 C) handles storage and use in vehicles and outdoor environments. The COP watchdog prevents lockup on weak batteries, and the SOIC-20 package is friendly to small hand-held plastic enclosures.
Được đề xuất
Industrial Sensor Signal Conditioning
For industrial sensor signal conditioning front ends, the MC908JK3ECDWE's on-chip ADC performs digital filtering and linearization on transducer outputs, replacing more expensive standalone signal conditioners. Its HC08 CISC core executes deterministic bit-banging for proprietary sensor protocols, while the 4 KB Flash supports factory calibration tables. The watchdog and LVI modules enable reliable operation in electrically noisy factory floors, and the SOIC-20 footprint simplifies hand-prototyping before moving to larger production runs.
Được đề xuất
Automotive Body Electronics (Auxiliary)
Although not AEC-Q100 qualified, the MC908JK3ECDWE has been deployed in non-safety automotive body electronics such as interior lighting controllers and accessory timers where its 8-bit HC08 performance is sufficient. Its wide operating temperature (-40 C to +85 C) covers cabin environments. Note that AEC-Q100 designs should instead use the MC9S08AW60E5MFGE or KEAZ automotive-grade families; the MC908JK3ECDWE is appropriate only for non-safety auxiliary body functions in legacy programs.
Được đề xuất
Small Motor / Fan Speed Controllers
The MC908JK3ECDWE drives small motor or fan speed controllers using its on-chip timers for PWM generation and its ADC for closed-loop RPM feedback. The 17 GPIO pins handle direction, brake, tachometer input, and fault lines. The 4 KB Flash stores custom acceleration/deceleration profiles, and the HC08 deterministic interrupt latency ensures clean PWM edges without jitter. The 20-SOIC package's modest thermal footprint suits low-power BLDC or DC-brush fan drivers up to a few hundred mA.
Được đề xuất
Smart Home Edge Nodes
For smart-home edge nodes that simply read a sensor and toggle a relay, the MC908JK3ECDWE provides 8-bit economy with enough Flash to fit ZigBee/Z-Wave co-processor glue logic, debouncing, and basic encryption. Its 3.3 V operation aligns with common smart-home wireless module supply rails. Designers considering new smart-home designs should plan to migrate to S08 or Kinetis E-series for ongoing supply, since the JK3E family is now in last-time-buy status.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC908JK3ECDWE — 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 | MCR908JK3ECDWE | MCR908JK3EMDWE | MC68HRC908JK3CDW |
|---|---|---|---|---|
| Package | 20-SOIC (300 mil) | 20-SOIC (300 mil) - same | 20-SOIC (300 mil) - same | 20-SOIC - same |
| Brand | NXP Semiconductors | Rochester Electronics | Rochester Electronics | NXP Semiconductors |
| Core | M68HC08 8-bit | M68HC08 8-bit | M68HC08 8-bit | M68HC08 8-bit (HRC low-power variant) |
| Program Memory | 4 KB Flash | 4 KB Flash | 4 KB Flash | 4 KB ROM |
| RAM | 128 B | 128 B | 128 B | 128 B |
| Max Clock | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Supply Voltage | 2.7 V to 3.3 V | 2.7 V to 3.3 V | 2.7 V to 3.3 V | 2.7 V to 3.3 V |
| Lifecycle Status | EOL / Last Time Buy | Active (Rochester authorized re-creation) | Active (Rochester authorized re-creation) | EOL |
| On-Chip ADC | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Authorized long-term supply path post-EOL (vsMC908JK3ECDWE (NXP original))
- 8-bit economy in 20-SOIC (vsMC908GZ60CFAE (HC08 GZ60, 64-LQFP))
- On-chip ADC eliminates external converters (vsMC908JK1ECDWE (smaller Flash variant))
Ghi chú thiết kế
Bulk-decouple VDD/VSS with a 4.7 uF tantalum or ceramic plus a 0.1 uF ceramic placed within 5 mm of the IC pins. The HC08 JK core has strict 2.7-3.3 V supply bounds; operation below 2.7 V triggers the LVI module and forces a reset. For battery-backed designs, add a 10 kohm pull-up on the RST line and a Schottky diode to protect against reverse polarity, which is a common failure in battery appliances.
Route the crystal traces between OSC1 and OSC2 symmetrically with short, parallel traces and a ground guard ring to avoid stray capacitance shifts. Keep digital switching traces (PWM, communication) at least 3 mm away from the oscillator traces to prevent injection of harmonics. Place the IC so that the SOIC-20 pads are aligned with 0.65 mm pitch (300 mil body), with via stitching along the ground pour to reduce ground bounce on GPIO transitions.
Do not assume 5 V tolerance on any GPIO pin: the HC08 JK I/O pins are absolute-maximum 3.6 V, and over-voltage will permanently damage the device. Use a level translator (e.g. resistive divider or dedicated translator) when interfacing with 5 V peripherals. The COP watchdog must be cleared in firmware within the configured timeout or it will reset the MCU, so always instrument the watch-dog service routine and avoid interrupts that could block it for longer than the COP timeout.
Thông tin tuân thủ
RoHS, lead-free, halogen-free, REACH, and conflict-mineral status were not explicitly confirmed in the verified web snippets. The 'E' suffix in the MPN traditionally denotes lead-free finish on NXP/Freescale parts, but official RoHS certificates should be requested from NXP or Rochester Electronics for compliance-critical orders. Part is not AEC-Q100 qualified - use MC9S08AW60E5MFGE or KEAZ family for automotive.
