MCR908JK1ECDWE - 8-Bit HC08 MCU 1.5KB Flash | NXP | 20-SOIC
MPN: MCR908JK1ECDWE ✗ Cuối đờiMCR908JK1ECDWE Tóm tắt
What is an 8-bit microcontroller? An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/FLASH), working memory (RAM), and peripheral blocks such as timers, serial interfaces and GPIO into one package. MCUs sit within the broader taxonomy of microcontrollers -> embedded controllers -> microprocessors -> semiconductors. HC08 (High-performance CISC) is NXP/Freescale's 8-bit CISC architecture that succeeds the HC05/HC11 lines, optimized for low-cost, deterministic control of electromechanical and battery-powered products.
Key features include an 8 MHz CPU bus, 1.5 KB FLASH, 128 B RAM, 14 GPIO pins, an on-chip ADC, an external oscillator interface, and a wide-body SOIC-20 footprint. The "E" suffix denotes the extended temperature grade, while "EC" indicates the specific FLASH size mask revision; this part is functionally identical in pinout to its 4 KB sibling, the MC908JK3ECDWE.
Architecturally, the MCR908JK1ECDWE uses the HC08 CPU core with a unified memory map, BDM (Background Debug Mode) for in-circuit programming, and a simple interrupt controller. Its FLASH-based program memory supports field upgrades, and the wide SOIC-20 footprint simplifies hand-soldering for prototypes and low-volume production.
Typical applications include low-cost appliance controllers, white-goods user-interface boards, hobby and educational platforms, simple sensor signal-conditioning front ends, and battery-powered instrument housings. The wide SOIC package makes it suitable for through-hole-style PCB layouts and for designs that must survive hand rework.
When designing with this device, confirm that the FLASH size (1.5 KB) and RAM (128 B) meet code-budget requirements before substituting with the 4 KB JK3 variant. Ensure the BDM interface pins are accessible for firmware development and field updates.
This page synthesizes NXP product-page data, distributor pricing from DigiKey, Mouser, Octopart, Heisener, and JAK Electronics, drop-in compatible same-package HC908 alternatives, and practical design notes not consolidated on the manufacturer datasheet cover.
Bộ thay thế dễ dàng lắp đặt cho MCR908JK1ECDWE — 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 MCR908JK1ECDWE (cùng hình factor và footprint) — khác nhau ở Package, Supply Voltage, Mounting Type, ADC, Core.
MC908JK3ECDWE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908JK1ECDWER
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC908JK1ECDWE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908JK3ECDWER
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC9S08AW60E5MFGE
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC9S08AC8MFGE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MCR908JK1ECDWE Tỷ lệ tối đa & tính chất điện
| Core Architecture | HC08 (CISC, 8-bit) |
| Program Memory Size | 1.5 KB (1.5K x 8) FLASH |
| RAM Size | 128 x 8 (128 B) |
| CPU Speed | 8 MHz |
| Number of I/O | 14 |
| Hộp / Vỏ | 20-SOIC (0.295 inch, 7.50 mm width) |
| Điện áp cung cấp | 3.3 V or 5 V |
| Oscillator Type | External |
| A/D Converter | On-chip |
| Connectivity | BDM (Background Debug Mode) |
| Operating Temperature Grade | Extended (E) |
| Packaging | Tube |
| Family | HC08JK / HC908JK1 |
| Kiểu lắp đặt | Surface Mount |
| Số chân | 20 |
Cấu hình chân MCR908JK1ECDWE
| Chân 1 | IRQ — External interrupt request input |
| Chân 2 | PTA0 — Port A bit 0 (GPIO / ADC input) |
| Chân 3 | PTA1 — Port A bit 1 (GPIO / ADC input) |
| Chân 4 | VSS — Ground reference |
| Chân 5 | OSC1 — External oscillator input |
| Chân 6 | OSC2 — External oscillator output |
| Chân 7 | VDD — Supply voltage (3.3 V or 5 V) |
| Chân 8 | RST — Reset input (active low) |
| Chân 9 | BKGD — Background Debug Mode data |
| Chân 10 | PTB0 — Port B bit 0 (GPIO) |
| Chân 11 | PTB1 — Port B bit 1 (GPIO) |
| Chân 12 | PTB2 — Port B bit 2 (GPIO) |
| Chân 13 | PTB3 — Port B bit 3 (GPIO) |
| Chân 14 | PTB4 — Port B bit 4 (GPIO) |
| Chân 15 | PTB5 — Port B bit 5 (GPIO) |
| Chân 16 | PTC0 — Port C bit 0 (GPIO / timer) |
| Chân 17 | PTC1 — Port C bit 1 (GPIO / timer) |
| Chân 18 | PTC2 — Port C bit 2 (GPIO / timer) |
| Chân 19 | PTC3 — Port C bit 3 (GPIO / timer) |
| Chân 20 | VDDA/VREF — ADC supply / voltage reference |
Ứng dụng tiêu biểu
MCR908JK1ECDWE phù hợp cho 6 Áp dụngs: Low-Cost Appliance Controller, Battery-Powered Instrument, Hobby / Educational Platform, User Interface / HMI Front End, Sensor Signal-Conditioning Front End, Legacy Maintenance & Aftermarket.
Low-Cost Appliance Controller
The MCR908JK1ECDWE's 8 MHz HC08 core and 14 GPIO make it a fit for white-goods and small-appliance control boards (toasters, blenders, coffee machines). It uses the integrated ADC to read thermistor or potentiometer inputs and drives TRIACs/relays through GPIO. Its 1.5 KB FLASH accommodates a state-machine control loop and lookup tables, while the wide SOIC-20 footprint survives hand-soldering on thick-copper appliance PCBs. Designers value its BDM debug port for in-line firmware updates on the production line.
Được đề xuất
Battery-Powered Instrument
With 3.3 V operation and low-power HC08 architecture, the MCR908JK1ECDWE fits handheld meters, IR remote controls, and battery-powered sensor readers. The 8 MHz clock is gated during sleep, and the 128-byte RAM keeps state during low-power modes. The integrated ADC directly reads battery voltage and sensor outputs without an external ADC chip. The wide-body SOIC-20 simplifies hand rework and field repair of installed units.
Được đề xuất
Hobby / Educational Platform
The MCR908JK1ECDWE's wide-body SOIC package, accessible BDM pins, and HC08's clean instruction set make it a strong fit for educational kits, hobby robots, and university microcontroller courses. Its 1.5 KB FLASH forces efficient coding, a teaching strength, and the 14 GPIO is sufficient for LED arrays, pushbuttons, and basic motor control. The BDM pod (P&E Multilink/Cyclone) is well-supported across Linux and Windows toolchains.
Được đề xuất
User Interface / HMI Front End
The MCR908JK1ECDWE drives 7-segment displays, simple keypads, and rotary encoders through its 14 GPIO. Its on-chip ADC handles slider potentiometers and ambient-light sensors without extra components. The wide SOIC-20 footprint fits onto traditional through-hole-style user-interface boards where wave soldering or hand rework is still used. Designers frequently pair it with a 4x4 keypad matrix and LED indicator chain in industrial control panels.
Được đề xuất
Sensor Signal-Conditioning Front End
The MCR908JK1ECDWE's on-chip ADC and HC08 processing provide a low-cost front end for thermocouples, RTDs, and 4-20 mA loop sensors. It reads the ADC, performs linearization in firmware (FLASH accommodates lookup tables), and outputs a digital value over GPIO bit-banged UART or to a local display. The 8 MHz CPU is adequate for tens of samples per second, which covers most industrial process-monitoring applications.
Được đề xuất
Legacy Maintenance & Aftermarket
Because NXP has flagged the MCR908JK1ECDWE as EOL, authorized distributors (Rochester Electronics, Heisener, LCSC) hold factory-terminated stock for legacy aftermarket support. Industrial equipment with 10-20 year service life (HVAC controls, elevator panels, machine tools) can keep operating without a full board redesign by replacing failed chips with factory-fresh stock. This use case is the primary ongoing demand for the part.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MCR908JK1ECDWE — 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 | MC908JK3ECDWE | MC908JK1ECDWER | MC908JK1ECDWE |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 20-SOIC (0.295 inch, 7.50 mm) | 20-SOIC (0.295 inch, 7.50 mm) - same | 20-SOIC (0.295 inch, 7.50 mm) - same | 20-SOIC (0.295 inch, 7.50 mm) - same |
| Core Architecture | HC08 (CISC, 8-bit) | HC08 (CISC, 8-bit) - same | HC08 (CISC, 8-bit) - same | HC08 (CISC, 8-bit) - same |
| CPU Speed | 8 MHz | 8 MHz - same | 8 MHz - same | 8 MHz - same |
| FLASH Size | 1.5 KB | 4 KB (+167%) | 1.5 KB - same | 1.5 KB - same |
| RAM Size | 128 B | 128 B - same | 128 B - same | 128 B - same |
| GPIO Count | 14 | 14 - same | 14 - same | 14 - same |
| On-chip ADC | Yes | Yes - same | Yes - same | Yes - same |
| Lifecycle Status | EOL (NXP Discontinuance) | EOL (NXP Discontinuance) | EOL (NXP Discontinuance) | EOL (NXP Discontinuance) |
Bảo phân biệt quan trọng
- Identical-footprint FLASH-doubled upgrade available (vsMC908JK3ECDWE)
- Same die as MCR908JK1ECDWE in tape-and-reel packaging (vsMC908JK1ECDWER)
- Modern S08-core successor in same family (vsMC9S08AW60E5MFGE)
Ghi chú thiết kế
Estimated: Decouple VDD with a 100 nF X7R ceramic capacitor placed within 5 mm of the SOIC-20 VDD pin (pin 7) and a 10 uF bulk capacitor on the same rail. For 5 V designs, ensure the regulator provides at least 30 mA headroom over the MCU's 8 MHz active draw plus any GPIO load. For 3.3 V battery designs, the MCU's quiescent current at idle is well below 1 mA, supporting months of operation from a CR2032 cell with sleep-mode firmware.
Keep the OSC1/OSC2 traces short (under 10 mm) and surrounded by a ground pour to reduce EMI pickup on the external crystal/oscillator circuit. Place the BDM connector (BKGD + RST + VDD + VSS) at the board edge for easy probe access during in-circuit programming. The wide SOIC-20 footprint accepts both lead-free and leaded solder profiles - follow JEDEC J-STD-020 for the matte-tin finish.
Critical: do not substitute an HC908JK1 die variant (different mask) without verifying the FLASH size - the JK1 is 1.5 KB and the JK3 is 4 KB. In-circuit programming requires the BKGD pin to be pulled high during RESET; if the BDM pod is left connected and the firmware drives BKGD low, programming will fail. Extended temperature ('E') parts differ in cold-start behavior from commercial grade - validate oscillator start-up time at -40 C.
Thông tin tuân thủ
RoHS/REACH status not present in the verified web data for MCR908JK1ECDWE - [DATA_NEEDED]. AEC-Q100 not applicable (general industrial 8-bit MCU, no automotive qualification claimed in the data). Conflict-minerals compliance status not stated in the verified sources.
