R5F21142SP#W4 - 16-Bit 20MHz MCU | Renesas
N.º de pieza: R5F21142SP#W4 ✗ Fin de vidaR5F21142SP#W4 Descripción general
A microcontroller is a programmable semiconductor that integrates a CPU core, memory, I/O ports, timers, and communication peripherals on one integrated circuit. The R5F21142SP belongs to the R8C/Tiny family of 16-bit embedded processors. It provides the basic control functions needed for compact industrial, consumer, appliance, and embedded-control products without requiring a separate processor and external interface components.
Key features include a 20 MHz R8C CPU core, 8 KB of flash memory for program storage, 512 x 8 bits of SRAM, and 13 general-purpose I/O ports. The 3 V to 5 V supply range supports both 3.3 V and 5 V system architectures. An internal oscillator is specified, while the 20-LSSOP package measures approximately 4.40 mm in width and supports compact, surface-mount PCB construction.
The silicon-gate CMOS implementation combines the R8C/Tiny CPU core with embedded flash memory and a low pin count. Its 16-bit architecture and instruction set are intended for embedded-control workloads where deterministic control, compact firmware, and low board area are more important than application-processor graphics performance. Program storage is sufficient for boot logic, state machines, communication handling, and peripheral coordination.
Typical uses include small motor and actuator controllers, sensor-conditioning systems, appliance control panels, industrial sequencers, temperature controllers, and compact embedded-control modules. The 13 available I/O ports can support digital inputs, output functions, and external interfaces where the selected board configuration does not require more pins. Firmware and peripheral allocation must be checked against the complete manufacturer datasheet before assigning functions.
Designers should follow the manufacturer’s recommended application circuit for power, decoupling, reset, clock, and programming connections. The 3 V to 5 V operating range and 20 MHz speed limit must both be respected when selecting external components and programming tools. Because this R8C/1x/14 group is intended for customers already using the product family, new projects should evaluate the manufacturer-recommended RL78/G12 series rather than assuming a feature-equivalent pin-compatible replacement.
This product page consolidates the confirmed R5F21142SP#W4 specifications, sourcing information, package details, lifecycle guidance, and design considerations. It also distinguishes the verified 20-LSSOP device from recommended new-design families, helping engineers assess fit without implying that a cross-family controller is a drop-in replacement.
Alternativas directas para R5F21142SP#W4 — 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 R5F21142SP#W4 (mismo factor de forma y huella) — difiere en CPU Core, Package, Process Technology, Product Type.
No hay alternativas directas disponibles para este producto.
Solicitar alternativasR5F21142SP#W4 Valores máximos y características eléctricas
| Product Type | 16-bit R8C/Tiny microcontroller |
| CPU Maximum Frequency | 20 MHz |
| Program Memory Size | 8 KB (8K x 8) |
| RAM Size | 512 x 8 bits |
| Number of I/O Ports | 13 ports |
| Tensión de alimentación de funcionamiento | 3 V to 5 V |
| Oscillator Type | Internal |
| Encapsulado | 20-LSSOP, 4.40 mm width |
| Tipo de montaje | Surface mount |
| Packaging | Tape and reel |
| Lead-Free Status | Pb-free |
| Product Series | R8C/1x/14 |
| CPU Core | R8C/Tiny Series |
| Process Technology | High-performance silicon gate CMOS |
| Architecture | 16-bit |
Guía de configuración de pines de R5F21142SP#W4 20-lssop, 4.40 mm width
Configuración de pines para R5F21142SP#W4 (encapsulado 20-lssop, 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 R5F21142SP#W4.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
R5F21142SP#W4 es adecuado para 6 aplicacións: Industrial Sensor and Sequencer Controller, Appliance Control Board, Compact Motor and Actuator Control, Temperature and Environmental Controller, LED Display and Indicator Sequencer, Legacy Embedded Product Extension.
Industrial Sensor and Sequencer Controller
The R5F21142SP#W4 is suitable for compact sensor-hub and sequencing equipment because its 16-bit R8C/Tiny core operates at up to 20 MHz while providing 8 KB of flash, 512 x 8 bits of RAM, and 13 I/O ports. The controller can evaluate digital sensor states, execute a timing sequence, and coordinate discrete outputs without a separate processor. Its 3 V to 5 V operating range also aligns with common industrial and embedded-control supply levels. Final peripheral selection must be confirmed from the complete manufacturer pin-description and feature tables before assigning timer, communication, or interrupt resources.
Recomendado
Appliance Control Board
The R5F21142SP#W4 can serve as the central controller in a compact appliance because its 512 x 8 bits of RAM support working state and small data buffers, while 8 KB of flash accommodates control logic, lookup tables, and interrupt routines. Thirteen I/O ports provide a practical interface count for switches, indicators, relays, and interlocks in cost-sensitive designs. Running at up to 20 MHz gives adequate headroom for deterministic state-machine control. Firmware planning should include stack margin and reserve boot or update space, while the PCB should follow the manufacturer’s 20-LSSOP layout and decoupling guidance.
Recomendado
Compact Motor and Actuator Control
The R5F21142SP#W4 is applicable to small motor, valve, or actuator subsystems where a compact 16-bit control loop and deterministic event handling are required. Its maximum 20 MHz operating speed supports more responsive control software than a basic 8-bit architecture, while the 13 I/O ports can accommodate pulse-output, direction, limit, and status functions. The 3 V to 5 V supply range simplifies integration with common embedded power systems. Designers must verify the available timer channels, compare the required PWM frequency and accuracy, and confirm that any external driver and protection circuitry operate safely from the selected rail.
Recomendado
Temperature and Environmental Controller
The R5F21142SP#W4 can implement a compact environmental controller that combines sensor sampling, threshold logic, timing, and display or relay coordination. Its 16-bit R8C/Tiny CPU core operates up to 20 MHz, allowing firmware to combine control calculations with background tasks, and the 8 KB flash store is suitable for a focused control application. The 13 I/O ports can support digital sensors, alarm outputs, and communication or display interfaces. Analog-to-digital conversion specifications and timer resources must be checked in the complete datasheet before choosing it for a new measurement design.
Recomendado
LED Display and Indicator Sequencer
The R5F21142SP#W4 is well suited to LED animation, indicator sequencing, and small display-control tasks because the 20 MHz 16-bit core can update multiple outputs while maintaining timing accuracy. Its 13 I/O ports provide a practical interface for discrete LEDs, matrix rows and columns, or status indicators, and the 512 x 8 bits of RAM can hold display patterns or animation state. The 3 V to 5 V operating range supports direct integration with many LED driver and logic systems. Verify available timer outputs, maximum pin-transition requirements, and current limits for every attached load before finalizing the board.
Recomendado
Legacy Embedded Product Extension
The R5F21142SP#W4 is most appropriate when extending an established R8C/1x/14 appliance or industrial-control platform rather than beginning a greenfield design. The 20-LSSOP package, 3 V to 5 V supply range, 8 KB flash, 512 x 8 bits of RAM, and 13 I/O ports align with the confirmed R5F21142SP identity. Using the same family can simplify firmware continuity for engineers familiar with its toolchain and peripheral organization. Renesas supports the group for customers already using it and recommends RL78/G12 for new designs, so platform extension should include a long-term supply and lifecycle review.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para R5F21142SP#W4 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Diferenciadores clave
- Established 16-bit R8C/Tiny control platform (frente a RL78/G12 series)
- Compact confirmed package configuration (frente a RL78/G12 series)
- Focused embedded memory configuration (frente a RL78/G12 series)
Notas de diseño
Use the manufacturer’s 20-LSSOP land pattern and pin-description table when assigning tracks and vias. Place required decoupling capacitors adjacent to their associated supply pins, keep sensitive signal routes short, and preserve the documented exposed routing options around the package. Do not infer pin functions from another R8C family member because peripheral assignments can differ even when the package and CPU core are similar.
Design the supply path for the confirmed 3 V to 5 V operating range and verify the exact operating-voltage limits, current consumption, and permitted startup conditions in the manufacturer datasheet. Place bulk and high-frequency decoupling according to the recommended application circuit, and check brownout, reset, and power-sequence behavior against the external circuitry. These checks prevent a controller from operating outside its intended electrical envelope.
Treat RL78/G12 as the manufacturer-recommended family for new R8C/1x/14 designs, not as a drop-in substitute for R5F21142SP#W4. A migration may require a different package, peripheral reassignment, toolchain change, and firmware revision. For an established R8C design, retain the exact ordering code, review the 20-LSSOP footprint, and validate the complete peripheral configuration before releasing a replacement build.
Información de cumplimiento
The distributor product information identifies R5F21142SP#W4 as Pb-free. RoHS, REACH, halogen-free, and conflict-minerals status were not confirmed in the available product information.
