MC9S08QE4CWJ - 8-Bit 20MHz 4KB MCU | NXP | Embedded
N.º de pieza: MC9S08QE4CWJ ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.437 | $1,44 |
| 10 | $1.437 | $14,37 |
| 100 | $1.437 | $143,70 |
| 500 | $1.437 | $718,50 |
| 1.000 | $1.437 | $1.437,00 |
MC9S08QE4CWJ Descripción general
An 8-bit microcontroller is a complete embedded processing component containing a processor core, program memory, data memory, input/output ports, and peripherals on one integrated circuit. The MC9S08QE4CWJ belongs to the S08 family of 8-bit embedded processors, where the processor, memory, and peripherals provide a self-contained platform for control logic. Its stated features support applications where a modest instruction set and compact package are appropriate.
The verified product information identifies 4KB of flash program memory, 512 bytes of RAM, 20 MHz operation, an integrated keyboard interface, and a 20-SOIC package. Flash memory provides nonvolatile program storage, while RAM supports temporary variables and stack operations. The 20 MHz maximum operating frequency gives the design a defined timing target for peripheral servicing and control-loop software, although actual performance depends on the specific firmware and peripheral configuration.
MC9S08QE4CWJ is suitable for cost-sensitive embedded products such as keypad scanners, simple control panels, household appliances, industrial modules, sensor-conditioning controllers, and auxiliary embedded subsystems. Its integrated keyboard interface can reduce external hardware and firmware overhead when the device must detect regularly arranged keys. The 20-SOIC package also provides a conventional surface-mount option for compact control boards.
The device is listed by NXP with an End of Life overview, so procurement should account for lifecycle constraints and possible availability through distributors. Before designing new production equipment, verify the exact package, pinout, electrical limits, programming method, and current supply status against the NXP datasheet. Existing applications should also confirm that their firmware and peripheral assignments are compatible with the selected device.
For a new design, the 4KB flash and 512-byte RAM are the principal constraints. Code size, stack depth, interrupt routines, library overhead, and boot or update requirements should be budgeted before schematic capture. If the application exceeds these resources, select a higher-memory MCU rather than assuming a software-only workaround. This page combines verified distributor and manufacturer information with engineering guidance and explicitly identifies parameters that require datasheet confirmation.
Alternativas directas para MC9S08QE4CWJ — 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 MC9S08QE4CWJ (mismo factor de forma y huella) — difiere en Package, RAM, Operating Temperature, Program Memory (Flash), RoHS Status.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MC9S08QE8CTG
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$6.3214 / unidad
Ver hoja de datos →MC9S08SH8MTG
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$1.55 / unidad
Ver hoja de datos →MC9S08QD2VSC
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$0.81 / unidad
Ver hoja de datos →MC9S08SH4CTJ
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$1.85 / unidad
Ver hoja de datos →MC9RS08KB4CWJ
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$1.49 / unidad
Ver hoja de datos →MC9S08QE4CWJ Valores máximos y características eléctricas
| Device Type | 8-bit microcontroller |
| Processor Family | S08 |
| Maximum Operating Frequency | 20 MHz |
| Flash Memory | 4KB |
| RAM | 512 bytes |
| Keyboard Interface | Integrated |
| Encapsulado | 20-SOIC |
| Manufacturer | NXP Semiconductors |
| Product Classification | Microcontroller |
| Supply Status | End of Life |
| Tipo de montaje | Surface Mount |
Guía de configuración de pines de MC9S08QE4CWJ 20-soic
Configuración de pines para MC9S08QE4CWJ (encapsulado 20-soic). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para MC9S08QE4CWJ.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MC9S08QE4CWJ es adecuado para 7 aplicacións: Keypad and Control Panel Interface, Small Household Appliance Controller, Industrial Sensor and Signal Interface, Compact Embedded Data Entry Device, Low-Cost Motor and Relay Sequencer, Cost-Sensitive Educational and Prototype Controller, Battery-Powered Auxiliary Control Node.
Keypad and Control Panel Interface
MC9S08QE4CWJ fits compact keypad-controlled products because the verified NXP product information identifies an integrated keyboard interface and 20 MHz operation. The MCU can manage key scanning, debounce state, command mapping, indicator control, and application logic within one embedded platform. Its 4KB flash and 512-byte RAM are sufficient for small control products when firmware is kept lean, but they require careful budgeting for interrupt routines and stack depth. The 20-SOIC package also supports space-conscious surface-mount layouts. Validate the exact keyboard interface pins and timing behavior against the manufacturer datasheet before finalizing the PCB.
Recomendado
Small Household Appliance Controller
The MC9S08QE4CWJ is appropriate for a low-cost household appliance controller when the product requires several digital inputs, simple sequencing, and limited local intelligence. Its 8-bit S08 architecture and 20 MHz operating capability can support state-machine-based control for motors, relays, buttons, lamps, or protection signals. The 4KB flash footprint favors compact firmware, while 512 bytes of RAM requires disciplined use of buffers and call depth. A 20-SOIC package provides a conventional surface-mount assembly option, although exact I/O counts and voltage limits must be verified before assigning every appliance function.
Recomendado
Industrial Sensor and Signal Interface
MC9S08QE4CWJ can serve as the local controller for a small industrial sensor module when the design is centered on digital sensing, threshold decisions, status reporting, and actuator control. The integrated keyboard interface is not a substitute for analog measurement, so analog-front-end requirements must be handled separately. The 20 MHz S08 processor provides a defined control-processing target, while 4KB flash and 512-byte RAM favor compact firmware rather than heavy protocol stacks. Use the exact datasheet to verify available timers, serial interfaces, ADC resources, pin multiplexing, and supply-voltage limits before selecting sensors or communication transceivers.
Recomendado
Compact Embedded Data Entry Device
The MC9S08QE4CWJ is a reasonable candidate for compact embedded data-entry products where a keypad, status display, and a limited control function are required. Its integrated keyboard interface can simplify input scanning, while the 20 MHz clock supports responsive event handling. The device’s 4KB flash and 512-byte RAM are the main design limits, so a production design should minimize display formatting code, buffering, and complex menu stacks. The 20-SOIC package helps preserve board area, but the exact display interface, pin multiplexing, and electrical timing must be checked against the MC9S08QE4CWJ documentation.
Recomendado
Low-Cost Motor and Relay Sequencer
MC9S08QE4CWJ can implement a compact sequencing controller for low-power motors, relays, solenoids, and status indicators. The 8-bit processor is well suited to deterministic state machines, timeout handling, button processing, and safety interlocks when the application does not require complex computation. The 20 MHz operating rate provides a timing basis for event scheduling, while the limited 4KB flash and 512-byte RAM encourage a simple firmware architecture. Before using it with inductive or mechanical loads, verify I/O voltage levels, current ratings, isolation, protection, and any required driver transistors from the exact datasheet.
Recomendado
Cost-Sensitive Educational and Prototype Controller
MC9S08QE4CWJ is useful for educational prototypes, embedded-control experiments, and small proof-of-concept platforms because it combines a recognizable 8-bit MCU family with 4KB flash, 512-byte RAM, and a 20-SOIC package. Learners can develop basic GPIO, timer, interrupt, keypad, and state-machine exercises while keeping the hardware compact. The small memory footprint encourages efficient programming practices and makes firmware behavior easy to inspect. The MCU is not a substitute for a higher-memory platform when networking, graphics, large data logging, or extensive libraries are required, and the exact programming and peripheral resources must be confirmed in the manufacturer documentation.
Recomendado
Battery-Powered Auxiliary Control Node
The MC9S08QE4CWJ can serve as an auxiliary control node in a battery-powered embedded product when its processing requirements are modest and the design focuses on local sensing, low-rate control, or user input. The 20-SOIC package supports compact board construction, and the 4KB flash footprint is appropriate for a narrowly defined firmware image. However, battery operation requires verification of sleep-mode behavior, active current, clock startup, and I/O leakage; those values are not present in the supplied verified data and must not be assumed. A hardware and firmware power-budget review is required before selecting the MCU for standby or energy-harvested operation.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC9S08QE4CWJ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MC9S08QE8CTG | MC9S08SH8MTG | MC9S08QD2VSC | MC9S08SH4CTJ | MC9RS08KB4CWJ |
|---|---|---|---|---|---|---|
| Package | 20-SOIC | 20-SOIC package not independently verified | 20-SOIC package not independently verified | 20-SOIC package not independently verified | 20-SOIC package not independently verified | 20-SOIC package not independently verified |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Processor Architecture | 8-bit S08 | S08-family architecture; details not verified | S08-family architecture; details not verified | S08-family architecture; details not verified | S08-family architecture; details not verified | RS08-family architecture; details not verified |
Diferenciadores clave
- Integrated keyboard interface (frente a MC9S08QE8CTG)
- Defined memory configuration (frente a MC9S08SH8MTG)
- 20 MHz operation in a compact package (frente a MC9S08QD2VSC)
- Documented cost-sensitive embedded positioning (frente a MC9S08SH4CTJ)
Notas de diseño
Do not treat the MC9S08QE4CWJ as a generic 20-pin MCU without confirming the exact NXP datasheet. The verified data establishes a 20-SOIC package, but does not provide the complete pinout, I/O count, supply limits, programming pins, or peripheral assignments. Verify reset, clock, power, ground, and unused-pin requirements before layout. A footprint match alone does not prove firmware or electrical compatibility.
The verified specifications do not provide operating voltage, active current, sleep current, or power-control behavior. Before powering a board, obtain those values from the manufacturer datasheet and ensure the regulator has adequate startup, decoupling, and sequencing margin. For a battery-powered design, calculate average current from the actual firmware duty cycle rather than assuming the 20 MHz clock specification predicts consumption. Estimated: power consumption must be calculated from measured or datasheet current values, not from frequency alone.
Reserve a compact 20-SOIC footprint and route decoupling and clock connections according to the exact NXP reference layout. Because the supplied data does not include pin names or exposed thermal information, do not assign pins based solely on package size. Confirm the land pattern, pin numbering, assembly tolerances, programming access, and any oscillator requirements in the official package drawing before releasing a PCB.
Información de cumplimiento
Compliance status was not included in the supplied verified data. Obtain current RoHS, REACH, lead-free, halogen-free, and conflict-mineral declarations from NXP or the relevant distributor documentation before procurement.