MC9S08QE4CTG - 8-Bit 20MHz MCU with 4KB Flash | NXP
N.º de pieza: MC9S08QE4CTG ✗ Fin de vidaMC9S08QE4CTG Descripción general
An S08 microcontroller is an 8-bit embedded-processing device within the broader microcontroller and semiconductor hierarchy. It combines a CPU, program flash, data RAM, I/O ports, timers, serial interfaces, and analog or communication peripherals on one integrated circuit. The MC9S08QE4CTG is part of the S08 family, which targets cost-sensitive control systems, human-interface devices, simple data acquisition, and USB-connected accessories.
The principal device characteristics include a 20 MHz maximum operating frequency, 4 KB of internal flash, 512 bytes of RAM, a 12-bit ADC feature, and an integrated USB controller. A flexible timer interface supports periodic timing and event-driven control functions. These resources allow the MCU to consolidate functions that might otherwise require discrete timing, interface, or conversion circuitry.
The S08 architecture emphasizes compact code density and efficient control processing. Flash memory supports firmware retention and in-circuit programming, while the 512-byte RAM provides working memory for stack operations, state variables, and data buffers. The 16-pin TSSOP package reduces board area compared with larger leaded packages and is suitable for cost-sensitive, high-density consumer and industrial equipment.
Typical applications include USB peripherals, keypad and menu interfaces, simple instrumentation, motor or relay control, low-speed data acquisition, and compact embedded-control modules. The 20 MHz clock rate provides sufficient response for supervisory control loops, while the integrated USB controller simplifies connection to a host computer or USB interface circuit.
Designers should verify the power-supply voltage, available I/O count, oscillator requirements, ADC reference details, and exposed peripheral assignments against the manufacturer datasheet before layout. Because the NXP product page identifies this MPN as end of life, production purchasing should account for limited future availability and qualify any drop-in replacement for firmware, timing, USB, and brownout behavior.
This page consolidates verified distributor pricing, lifecycle information, same-family drop-in candidates, and practical selection guidance that helps engineers evaluate replacement risk beyond a simple package and clock-frequency match.
Alternativas directas para MC9S08QE4CTG — 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 MC9S08QE4CTG (mismo factor de forma y huella) — difiere en Maximum CPU Frequency, Operating Temperature, Package, RAM.
MC9S08QE8CTG
✅ Sustitución directa ⚠️ Especificaciones sin verificarConsulte el precio
Ver hoja de datos →MC9S08QE16CTG
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MC9S08QE32CTG
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MC9S08QE64CTG
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MC9S08QE4CTG Valores máximos y características eléctricas
| Microcontroller Type | 8-bit S08 microcontroller |
| Maximum CPU Frequency | 20 MHz |
| Program Memory | 4 KB flash |
| Flash Organization | 4K x 8 |
| RAM | 512 bytes |
| ADC Resolution | 12 bit |
| Integrated USB Controller | Yes |
| Timer Interface | Flexible timer interface |
| Encapsulado | 16-pin TSSOP, 4.40 mm width |
| Temperatura de funcionamiento | -40 °C to +85 °C |
| Tipo de montaje | Surface mount |
| Estado del ciclo de vida | End of life |
Guía de configuración de pines de MC9S08QE4CTG 16-pin tssop, 4.40 mm width
Configuración de pines para MC9S08QE4CTG (encapsulado 16-pin tssop, 4.40 mm width). 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 MC9S08QE4CTG.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MC9S08QE4CTG es adecuado para 6 aplicacións: USB Desktop and Portable Accessories, Keypad and Menu Interface Control, Simple Data Acquisition and Control, Timer-Based Appliance and Relay Control, Battery-Powered Sensor Node, Industrial Control and HMI Module.
USB Desktop and Portable Accessories
The MC9S08QE4CTG fits compact USB accessories because it combines an integrated USB controller with an 8-bit S08 core operating up to 20 MHz. Its 4 KB flash and 512 bytes RAM are sufficient for small control or interface firmware when the application does not require large buffers. Placing the MCU beside the USB connector and required passives can reduce board area versus a discrete USB interface solution. The principal tradeoff is lifecycle risk: NXP marks the device end of life, so a production accessory should include a qualified second source or sufficient last-time-buy inventory.
Recomendado
Keypad and Menu Interface Control
The MC9S08QE4CTG can scan a keypad, manage menu state, and debounce user inputs in compact control panels. Its 20 MHz operating frequency provides ample response for polling and display updates, while the 4 KB flash supports compact menu logic and the 512 bytes RAM supports transient key and navigation state. The 16-pin TSSOP also preserves PCB area in space-constrained equipment. Firmware should include debounce timing and verify the exact I/O and power assignments against the datasheet before layout.
Recomendado
Simple Data Acquisition and Control
The MC9S08QE4CTG is appropriate for low-channel instrumentation that combines a 12-bit ADC feature with digital control functions. The MCU can sample analog inputs, apply filtering and calibration, and report results through a serial or USB interface. Its 20 MHz clock supports responsive control sequencing, while the 4 KB flash limits firmware to smaller measurement routines. Designers should verify ADC reference accuracy, sampling requirements, and available I/O because those detailed electrical limits were not included in the supplied source data.
Recomendado
Timer-Based Appliance and Relay Control
The MC9S08QE4CTG can implement timer-driven appliance, pump, relay, or sequencing control using its flexible timer interface and 20 MHz S08 core. Periodic events can be scheduled without relying on a large external timer, while the 4 KB flash stores a compact state machine and the 512 bytes RAM holds counters and operating flags. The 16-pin TSSOP is useful in compact controller boards. Production designs must check output-driver ratings, isolation requirements, flyback components, and whether the end-of-life status makes a long-term supply commitment necessary.
Recomendado
Battery-Powered Sensor Node
MC9S08QE4CTG can serve as the local controller in a compact battery-powered sensor node that performs periodic acquisition, threshold decisions, and USB configuration. The 4 KB flash and 512 bytes RAM align with lightweight firmware, and the 20 MHz core supports responsive handling of sensor and digital inputs. The integrated USB controller can simplify configuration or data export without a separate USB bridge. Before deployment, verify sleep-mode behavior, supply-voltage limits, ADC reference stability, and quiescent current because those values were not supplied in the verified data.
Recomendado
Industrial Control and HMI Module
The MC9S08QE4CTG can act as a secondary controller in industrial HMI or equipment modules requiring local logic, timers, digital I/O, and USB service access. Its 4 KB flash is appropriate for supervisory routines rather than a full graphical interface, while the 16-pin TSSOP supports dense board placement. The part should be selected only when the 20 MHz processing rate and 512 bytes RAM match the task. Industrial qualification requirements, extended-temperature variants, EMC performance, and lifecycle continuity must be checked separately because the verified data confirms only the -40 °C to +85 °C range and end-of-life status.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC9S08QE4CTG — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MC9S08QE8CTG | MC9S08QE16CTG | MC9S08QE32CTG | MC9S08QE64CTG |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 16-TSSOP | 16-TSSOP | 16-TSSOP | 16-TSSOP | 16-TSSOP |
| Program Memory | 4 KB flash | 8 KB flash | 16 KB flash | 32 KB flash | 64 KB flash |
Diferenciadores clave
- Lower verified flash capacity than the same-family alternatives (frente a MC9S08QE8CTG)
- Compact 4 KB embedded-control configuration (frente a MC9S08QE16CTG)
- Lower named memory requirement than the largest listed family candidates (frente a MC9S08QE64CTG)
- Verified distributor inventory despite end-of-life status (frente a MC9S08QE8CTG)
Notas de diseño
Do not treat a matching TSSOP outline as proof of software compatibility. Before substituting an S08QE variant, compare power pins, oscillator pins, reset behavior, USB D+/D− assignments, ADC inputs, timer outputs, and all multiplexed I/O against the manufacturer datasheets. Also verify that the replacement's flash organization and memory map preserve the application firmware. Because MC9S08QE4CTG is end of life, retain a tested system-level qualification record for any proposed replacement.
Verify the permitted supply range, operating current, and brownout thresholds directly from the manufacturer datasheet because those electrical limits were not included in the supplied source data. Place the MCU's decoupling capacitors close to the supply and ground pins, keep USB and oscillator return paths short, and provide clean power for the integrated USB controller. Validate startup and reset behavior across the complete supply range rather than relying only on typical operating conditions.
Route the oscillator network, programming and debug signals, USB differential pair, and reset network according to the manufacturer layout guidance. Keep the oscillator away from USB data and switching-power nodes to reduce noise coupling. Confirm the exact 16-pin TSSOP orientation and exposed thermal or routing requirements in the package drawing before releasing artwork. A complete verified pin table was unavailable, so schematic-to-PCB checks are especially important.
The 20 MHz operating speed and 512 bytes of RAM do not by themselves indicate a high thermal load, but actual dissipation depends on supply voltage, clock activity, I/O loading, and ambient conditions. For production thermal qualification, measure the operating current in the final firmware and use the manufacturer's package thermal data. The supplied sources did not provide junction-temperature limits, package thermal resistance, or power ratings, so those figures must be obtained from the datasheet rather than estimated.
Información de cumplimiento
The supplied manufacturer and distributor results did not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 qualification was not identified and is therefore not applicable for the listed general-purpose device.
