MCR908JK1ECDWE - 8-Bit HC08 MCU 1.5KB Flash | NXP | 20-SOIC
N.º de pieza: MCR908JK1ECDWE ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $5.93 | $5,93 |
| 10 | $5.34 | $53,40 |
| 100 | $4.75 | $475,00 |
| 500 | $4.14 | $2.070,00 |
| 1.000 | $3.55 | $3.550,00 |
MCR908JK1ECDWE Descripción general
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.
Alternativas directas para MCR908JK1ECDWE — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MCR908JK1ECDWE (mismo factor de forma y huella) — difiere en Package, Supply Voltage, Mounting Type, ADC, Core.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MC908JK3ECDWE
✅ Sustitución directa✓ En stock
$4.78 / unidad
Ver hoja de datos →MC908JK1ECDWER
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC908JK1ECDWE
✅ Sustitución directa✓ En stock
$4.75 / unidad
Ver hoja de datos →MC908JK3ECDWER
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC9S08AW60E5MFGE
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC9S08AC8MFGE
✅ Sustitución directa✓ En stock
$4.95 / unidad
Ver hoja de datos →MCR908JK1ECDWE Valores máximos y características eléctricas
| 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 |
| Encapsulado / Carcasa | 20-SOIC (0.295 inch, 7.50 mm width) |
| Tensión de alimentación | 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 |
| Tipo de montaje | Surface Mount |
| Recuento de pines | 20 |
Configuración de pines de MCR908JK1ECDWE
| Pin 1 | IRQ — External interrupt request input |
| Pin 2 | PTA0 — Port A bit 0 (GPIO / ADC input) |
| Pin 3 | PTA1 — Port A bit 1 (GPIO / ADC input) |
| Pin 4 | VSS — Ground reference |
| Pin 5 | OSC1 — External oscillator input |
| Pin 6 | OSC2 — External oscillator output |
| Pin 7 | VDD — Supply voltage (3.3 V or 5 V) |
| Pin 8 | RST — Reset input (active low) |
| Pin 9 | BKGD — Background Debug Mode data |
| Pin 10 | PTB0 — Port B bit 0 (GPIO) |
| Pin 11 | PTB1 — Port B bit 1 (GPIO) |
| Pin 12 | PTB2 — Port B bit 2 (GPIO) |
| Pin 13 | PTB3 — Port B bit 3 (GPIO) |
| Pin 14 | PTB4 — Port B bit 4 (GPIO) |
| Pin 15 | PTB5 — Port B bit 5 (GPIO) |
| Pin 16 | PTC0 — Port C bit 0 (GPIO / timer) |
| Pin 17 | PTC1 — Port C bit 1 (GPIO / timer) |
| Pin 18 | PTC2 — Port C bit 2 (GPIO / timer) |
| Pin 19 | PTC3 — Port C bit 3 (GPIO / timer) |
| Pin 20 | VDDA/VREF — ADC supply / voltage reference |
Aplicaciones típicas
MCR908JK1ECDWE es adecuado para 6 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MCR908JK1ECDWE — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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) |
Diferenciadores clave
- Identical-footprint FLASH-doubled upgrade available (frente a MC908JK3ECDWE)
- Same die as MCR908JK1ECDWE in tape-and-reel packaging (frente a MC908JK1ECDWER)
- Modern S08-core successor in same family (frente a MC9S08AW60E5MFGE)
Notas de diseño
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.
Información de cumplimiento
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.
