R5F211B3SP#U0 16-Bit 20MHz 12KB Flash MCU | Renesas
部品番号: R5F211B3SP#U0 ✗ 生産終了R5F211B3SP#U0 概要
A microcontroller is a semiconductor device that integrates a CPU core, program memory, data memory, peripheral modules, and I/O into one integrated circuit. The R8C family combines a 16-bit CISC-based R8C CPU core with embedded flash and data-flash capabilities. Renesas positions the R5F211B3SP#U0 within the R8C/1B group for compact industrial, consumer, and instrumentation designs.
Key features include a 16-bit CPU core, 20 MHz maximum operating frequency, 12 KB flash memory, and operation from a 3 V to 5 V supply range. The device is supplied in a 20-LSSOP package, allowing a relatively compact board footprint. Its integrated program and data-flash architecture simplifies firmware storage and supports embedded control functions without requiring separate external memory.
The R8C/1B architecture is suited to applications requiring deterministic embedded behavior, timer-based sequencing, serial communications, and general-purpose I/O control. Because the device combines flash memory with a compact package and a 20 MHz clock, it can serve as the primary controller in small appliances, sensor modules, instrumentation, and industrial control boards.
Typical uses include motor and actuator control, temperature or process monitoring, digital control panels, sensor interfaces, and compact consumer equipment. The 20-LSSOP package is particularly useful where component height and board area are constrained but a 20-pin interface remains sufficient for the required control and communication signals.
When laying out a board, follow the manufacturer pin-assignment and recommended-circuit diagrams in the R5F211B3SP datasheet. Pay particular attention to decoupling, programming interface access, reset behavior, and the unused I/O pins. The 20-LSSOP footprint must be checked against the package drawing before the PCB footprint is released.
This product page combines the manufacturer ordering information, distributor specifications, package details, and practical design guidance to help engineers evaluate the R5F211B3SP#U0 for an embedded-control design. Request a quote for current availability, lead time, and commercial terms through the form on this page.
ドロップイン代替品: R5F211B3SP#U0 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストR5F211B3SP#U0 最大定格＆電気的特性
| Product Type | 16-bit single-chip microcontroller |
| Series | R8C/1x/1B |
| CPU Core | R8C 16-bit core |
| Maximum CPU Frequency | 20 MHz |
| Program Memory | 12 KB flash (12K x 8) |
| Supply Voltage Range | 3 V to 5 V |
| パッケージ | 20-LSSOP |
| ピン数 | 20 pins |
| 実装タイプ | Surface mount |
| Instruction Set | 16-bit CISC |
| Data Flash | Present |
| 動作温度範囲 | -20 °C to +85 °C |
| Lead-Free Status | Pb-free |
| Order Code | R5F211B3SP#U0 |
| Package Code | PLSP0020JB-A |
| Watchdog Timer | WDTO |
R5F211B3SP#U0 plsp0020jb-a ピン配置ガイド
R5F211B3SP#U0 (plsp0020jb-a パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: R5F211B3SP#U0.
詳細は データシート をご参照ください。
主な用途
R5F211B3SP#U0 の用途: 6 件s: Compact Sensor Interface Controller, Industrial Process Monitor, Motor and Actuator Sequencer, Digital Appliance Controller, Programmable Logic and I/O Hub, Low-Speed Communications Node.
Compact Sensor Interface Controller
The R5F211B3SP#U0 fits compact sensing equipment that must acquire digital sensor data, apply control logic, and expose results through a serial interface. Its 16-bit R8C CPU core and 20 MHz operating speed provide computational margin for protocol handling, while 12 KB of embedded flash supports device firmware, calibration logic, and fault handling without an external program-memory device. The 20-LSSOP package saves board area compared with many larger microcontroller packages. Designers should confirm the required timer channels, serial interfaces, pin multiplexing, and programming signals in the datasheet before assigning the sensor bus, status indicators, and communications connector.
おすすめ
Industrial Process Monitor
The R5F211B3SP#U0 can serve as the local controller in a small process-monitoring instrument that samples digital inputs, drives display or indicator circuits, and records operating events. Its 12 KB flash provides enough space for structured firmware when the application avoids a large graphical user interface, while the R8C/1B architecture supports timing, interrupts, and watchdog supervision. The 20-LSSOP package suits compact instrument housings. Verify the number and electrical characteristics of available I/O channels, the required display interface, and the operating temperature range against the target enclosure.
おすすめ
Motor and Actuator Sequencer
The R5F211B3SP#U0 is applicable in a compact actuator controller that uses timers and digital outputs to sequence motors, relays, or valves. Its 20 MHz R8C core can execute motion-state logic and fault checks, while the integrated watchdog supports unattended operation. The 20-LSSOP package leaves board area for power conversion and interface circuitry. The MCU should not directly drive inductive loads unless suitable driver stages, protection, and isolation are added. Verify timer resolution, output-drive limits, pin timing, and thermal conditions from the manufacturer datasheet.
おすすめ
Digital Appliance Controller
The R5F211B3SP#U0 can manage a small appliance control board that coordinates buttons, indicator LEDs, relays, and a low-speed serial control link. The R8C/1B MCU combines a 16-bit instruction set with 20 MHz performance and 12 KB of flash, allowing application logic, operating modes, and diagnostics to reside on-chip. Its 20-LSSOP package is useful in boards where every millimeter matters. The design must include adequate supply decoupling, relay-driver circuitry where needed, protection against inductive transients, and firmware checks for stuck inputs or unexpected resets.
おすすめ
Programmable Logic and I/O Hub
The R5F211B3SP#U0 can act as a programmable I/O hub in a test fixture or embedded accessory where several digital lines must be routed, sequenced, or monitored. Its embedded flash supports configuration tables and field logic, and the 20 MHz core allows responsive interrupt-driven control. The 20-LSSOP footprint provides a compact implementation, although the exact usable GPIO count depends on the power, programming, reset, and clock assignments. Prototype the PCB against the manufacturer package drawing and validate every external signal for voltage tolerance, direction, pull-up or pull-down requirements, and safe startup states.
おすすめ
Low-Speed Communications Node
The R5F211B3SP#U0 can serve as a compact communications endpoint that receives commands, executes local control functions, and forwards status over a serial link. Its 20 MHz 16-bit core provides processing capacity for protocol handling beyond simple pass-through behavior, while 12 KB flash can hold the communications stack, configuration, and application logic. The 20-LSSOP package supports board-space reduction. Confirm that the selected UART or other communication interface, pin multiplexing, baud-rate support, and peripheral sharing satisfy the design, and use the manufacturer’s electrical characterization for signal-level and timing decisions.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: R5F211B3SP#U0 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 |
|---|---|
| Brand | Renesas Electronics |
| Package | 20-LSSOP |
| CPU Architecture | 16-bit R8C core |
| Maximum CPU Frequency | 20 MHz |
| Program Memory | 12 KB flash |
| Supply Voltage Range | 3 V to 5 V |
| Data Flash | Present |
| Watchdog Timer | WDTO |
| Operating Temperature Range | -20 °C to +85 °C |
| Mounting Type | Surface mount |
主な差別化要因
- Compact 16-bit control in a 20-pin package （vs Larger-pin-count 16-bit MCU designs)
- Integrated nonvolatile program memory （vs MCU designs requiring an external program-memory device)
- R8C family continuity for retained embedded platforms （vs Cross-brand R8C replacements)
設計ノート
Create the 20-LSSOP footprint from the manufacturer package drawing and verify pin numbering against the R5F211B3SP datasheet. Confirm the lead pitch, lead width, body dimensions, and seating-plane orientation before release. The programming interface, reset signal, supply pins, and ground connections should be routed so they remain accessible for production programming and engineering diagnosis.
Follow the manufacturer’s recommended decoupling and supply-routing arrangement rather than relying on generic MCU practice alone. Place the required bypass capacitor or capacitors close to the device’s supply and ground pins, use a low-impedance ground return, and keep switching-regulator routing away from sensitive input traces. Verify the chosen regulator can start the MCU and peripheral load across the full 3 V to 5 V operating range.
Do not substitute a related R5F211B3 ordering code without checking the package, temperature grade, flash configuration, and pin assignments. The #U0 designation must remain exact in the BOM and purchasing documentation. For an existing design, retain the same clock circuit, reset behavior, programming connector, and firmware device configuration; otherwise the MCU may solder correctly but fail to start or communicate with the debugger.
Reserve contiguous access to the device’s programming and debug signals and avoid routing high-current or fast-switching nets beneath the MCU area. Use a stable reference plane for power and ground, minimize loop area in sensitive paths, and separate external reset or communication conductors from switching nodes. Review unused pins and their permitted states in the pin-description table before finalizing the schematic.
コンプライアンス情報
The R5F211B3SP#U0 is identified as Pb-free. The available product information does not explicitly establish RoHS, REACH, halogen-free, or conflict-minerals status.
