R5F21144SP#U0 - 16-Bit 20MHz R8C MCU | Renesas Electronics
N.º de pieza: R5F21144SP#U0 ✗ Fin de vidaR5F21144SP#U0 Descripción general
A microcontroller is a programmable semiconductor that combines a CPU core, memory, peripheral interfaces, and I/O ports on one integrated circuit. The R5C family belongs to the embedded-processor hierarchy and uses the R8C/Tiny Series CPU core. Compared with an 8-bit MCU, a 16-bit controller can perform arithmetic and address larger data structures more efficiently, while retaining the low cost, low power, and real-time control characteristics expected from a dedicated embedded controller.
Key features include a 20 MHz maximum operating frequency, 16 KB flash program memory organized as 16K x 8, a four-channel 10-bit ADC, and an operating temperature range of -20°C to +85°C. Flash memory allows firmware to be programmed and updated without an external programmable memory device. The 20-LSSOP outline also supports compact PCB layouts where component density and a moderate pin count are important.
The R8C/14 architecture is implemented using a silicon-gate CMOS process and incorporates a high-performance R8C/Tiny Series CPU core with instruction-efficient 16-bit operations. The target includes 13 I/O pins according to its listed device data, leaving sufficient interface capacity for digital control, communications, and analog monitoring. Exact clock, timer, and peripheral configurations should be confirmed against the manufacturer datasheet before final clock-tree and peripheral allocation.
Typical uses include compact industrial controllers, consumer appliances, sensor-interfaces, programmable timers, and embedded equipment requiring modest computation and local data acquisition. The four ADC channels are useful for monitoring temperature, position, pressure, or analog control signals, while the 13 I/O pins support switches, indicators, actuators, and serial or bus-connected peripherals.
Designers should plan decoupling, clock routing, programming access, and mixed-signal grounding carefully. Place input and output capacitors close to the supply pins, route analog inputs away from switching nodes, and preserve clear programming access. Because this R8C/14 group is a non-promotion family for existing adopters, new projects should also evaluate Renesas's recommended RL78/G12 path when long-term new-design support is a priority.
This product page consolidates the verified device specifications, package information, lifecycle position, application guidance, and same-family drop-in options into a practical engineering reference. It also highlights the trade-off between preserving an installed R8C/14 design and moving a completely new design to the manufacturer-recommended RL78/G12 family.
Alternativas directas para R5F21144SP#U0 — 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 R5F21144SP#U0 (mismo factor de forma y huella) — difiere en Package, Process Technology, Product Type, CPU Core, Flash Memory.
R5F21145SP#U0
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
R5F21146SP#U0
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
R5F21147SP#U0
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
R5F21142SP#U0
✅ Sustitución directa ⚠️ Especificaciones sin verificarConsulte el precio
Ver hoja de datos →R5F21144SP#U0 Valores máximos y características eléctricas
| Product Type | 16-bit R8C/Tiny Series microcontroller |
| CPU Group | R8C/14 |
| Maximum CPU Frequency | 20 MHz |
| Program Memory Size | 16 KB |
| Program Memory Organization | 16K x 8 |
| Program Memory Type | Flash |
| Operating Voltage Range | 2.7 V to 5.5 V |
| ADC Resolution | 10 bit |
| ADC Channels | 4 channels |
| Number of I/O Pins | 13 |
| Encapsulado | 20-pin LSSOP, 4.4 mm |
| Rango de temperatura de funcionamiento | -20°C to +85°C |
| Process Technology | High-performance silicon gate CMOS |
| Tipo de montaje | Surface mount |
| Estado RoHS | Compliant |
| Lead-Free Status | Pb-free |
| Lifecycle Recommendation | Supported for customers that previously adopted the R8C/14 Group; RL78/G12 recommended for new designs |
Guía de configuración de pines de R5F21144SP#U0 20-pin lssop, 4.4 mm
Configuración de pines para R5F21144SP#U0 (encapsulado 20-pin lssop, 4.4 mm). 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 R5F21144SP#U0.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
R5F21144SP#U0 es adecuado para 6 aplicacións: Compact Industrial Control, Sensor Interface Module, Programmable Timer and Sequencer, Consumer Appliance Controller, LED Lighting Controller, Battery-Powered Portable Device.
Compact Industrial Control
The R5F21144SP#U0 fits compact industrial controllers that need efficient 16-bit arithmetic without a high-cost processor. Its 20 MHz R8C/14 core supports responsive task scheduling, while 16 KB of flash provides on-device firmware for control logic and state handling. The 13 I/O pins can connect digital inputs, relay or valve drivers, status indicators, and external peripherals. Four 10-bit ADC channels add local analog monitoring without requiring a separate converter. In an industrial design, retain the 2.7 V to 5.5 V operating range, decouple each supply connection, and isolate analog traces from switching nodes. Because the MCU belongs to a non-promotion family, maintenance and product-continuity requirements should be evaluated before committing a new platform.
Recomendado
Sensor Interface Module
The R5F21144SP#U0 is appropriate for a small sensor-interface module combining analog measurement with local digital processing. Four 10-bit ADC channels can monitor resistive sensors, potentiometers, or externally conditioned analog signals, while 13 I/O pins support sensor enables, alarm outputs, status LEDs, and a host interface. The 16-bit R8C/14 CPU can perform scaling, filtering, calibration, and threshold decisions locally at up to 20 MHz. Place analog inputs away from digital clock and switching traces, provide a stable reference as required by the analog circuitry, and use separate return paths to minimize ground coupling. Firmware should include sensor-range checks and safe defaults for outputs when a channel is outside its valid measurement window.
Recomendado
Programmable Timer and Sequencer
The R5F21144SP#U0 can implement a programmable timer, event sequencer, or multi-output controller where precise timing and compact logic are more important than large data storage. Its 20 MHz R8C/14 core supports efficient instruction execution, and 13 I/O pins provide enough parallel channels for steps, gates, triggers, and status signals. On-board flash allows operating schedules, calibration tables, or event sequences to be stored locally. Design the timer source and I/O timing budget from the manufacturer clock and peripheral specifications, and avoid routing high-current or inductive drive signals directly through MCU pins. Use suitable driver transistors or interface circuits for relays, motors, and solenoids, and account for their switching transients during PCB layout.
Recomendado
Consumer Appliance Controller
A 20-pin R8C/14 microcontroller is well matched to compact consumer appliances requiring local control, user inputs, and a small amount of on-board flash. The R5F21144SP#U0 can manage buttons, indicators, relays, motors, and sensor inputs while its 20 MHz core executes control algorithms and interlocks. The 2.7 V to 5.5 V supply range supports common embedded rails, and flash simplifies firmware integration without an external memory component. Keep mains or high-energy switching stages physically separated from the MCU and analog measurement circuitry. Apply proper grounding, transient protection, and isolation practices according to the appliance safety requirements. For a newly launched appliance, compare the established R8C/14 software ecosystem with the manufacturer-recommended RL78/G12 family before finalizing the platform.
Recomendado
LED Lighting Controller
The R5F21144SP#U0 can serve as the logic controller in a small LED-lighting system where programmable sequences, status feedback, and local timing are required. Its 16-bit processing and 20 MHz clock are suitable for coordinating multiple outputs and user commands, while the 13 I/O pins can drive logic-level control, enable signals, and fault inputs. The four ADC channels may support dimming feedback, current sensing, or temperature monitoring when suitable analog conditioning is included. Keep LED-driver switching loops physically separate from the MCU and analog traces, and use the manufacturer's recommended interface method for dimming or polarity control. Firmware should include fail-safe states for open LEDs, driver faults, and power-loss restart behavior.
Recomendado
Battery-Powered Portable Device
The R5F21144SP#U0 can support compact battery-powered accessories that require low-cost local control and limited data processing. Its 2.7 V minimum operating voltage permits operation from appropriately regulated low-voltage rails, while flash preserves configuration and firmware without an external memory package. The 13 I/O pins can operate switches, indicators, sensors, and low-power peripherals. To maximize battery life, use the device's low-power operating modes where suitable, disable unused ports, and switch off external analog circuitry when measurements are not required. Validate regulator dropout, quiescent behavior, and wake-up latency against the power-budget requirements. The 20-LSSOP footprint also helps reduce board area in space-constrained portable products.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para R5F21144SP#U0 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | R5F21145SP#U0 | R5F21146SP#U0 | R5F21147SP#U0 | R5F21142SP#U0 |
|---|---|---|---|---|---|
| Package | 20-LSSOP, 4.4 mm | 20-LSSOP | 20-LSSOP | 20-LSSOP | 20-LSSOP |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| CPU Group | R8C/14 | R8C family | R8C family | R8C family | R8C family |
| Architecture | 16-bit R8C/Tiny Series | 16-bit R8C/Tiny Series | 16-bit R8C/Tiny Series | 16-bit R8C/Tiny Series | 16-bit R8C/Tiny Series |
Diferenciadores clave
- Balanced embedded feature set in a compact package (frente a R5F21145SP#U0)
- Direct fit for an established 16 KB flash design (frente a R5F21142SP#U0)
- Mixed-signal control without an external ADC (frente a R5F21147SP#U0)
Notas de diseño
Place all required decoupling capacitors immediately adjacent to the device power and ground pins, with the shortest possible return path. Keep the analog input region away from the R8C oscillator routing and any switching regulator or relay-driver traces. If the four ADC channels are used, route them as a separate group where practical and provide a quiet ground reference to the analog circuitry.
Do not treat a package outline match as sufficient proof that another MCU is a drop-in replacement. Before substituting an R8C/14 family member, compare pin multiplexing, oscillator requirements, memory size, interrupt vectors, timer resources, ADC channels, and startup code. Also verify that the replacement's operating voltage and temperature ratings meet the original design limits.
Use a regulator and capacitor network suitable for the 2.7 V to 5.5 V operating range, including the voltage tolerance of the selected supply rail. Calculate startup current, active current, and peripheral load separately so the worst-case system demand is known. In battery equipment, disable unused ports and external analog blocks, then use the manufacturer power-mode information to validate wake-up behavior and standby consumption.
Preserve the manufacturer's recommended oscillator layout and keep programming or debug-related contacts accessible for production programming and validation. Route high-current LED, motor, and relay outputs away from the MCU and analog section. Use a continuous ground plane where the board design permits it, but avoid allowing switching return currents to cross the quiet analog ground region.
Información de cumplimiento
The product listings identify RoHS compliance and a Pb-free R5F21144SP#U0. No specific AEC-Q100 qualification, REACH status, halogen-free declaration, or conflict-minerals declaration is identified.
