R5F211A3SP#U0 - 16-Bit R8C/1A MCU, 20MHz, 12KB Flash, 20-LSSOP | Renesas
Артикул: R5F211A3SP#U0 ✓ АктивенR5F211A3SP#U0 Обзор
A microcontroller is a self-contained computing element that integrates a CPU core, program memory, data memory, analog and digital peripherals, and clocking on a single die. The R8C family from Renesas combines a 16-bit CISC instruction set with very low power consumption and a small instruction footprint, a combination popular in cost-sensitive embedded control products. R8C/1A group parts sit at the entry point of that family: they omit data flash, which keeps cost and part count down for designs whose configuration data is programmed once at build time.
Key features include a 20 MHz maximum operating frequency, a 4-channel 10-bit A/D converter with 8-bit and 10-bit selectable resolution, and a peripheral set covering I2C, SIO (serial I/O), SSU (synchronous serial), and UART/USART channels. The operating supply range is 2.7 V to 5.5 V, allowing the same device to run from a 3.3 V or 5 V rail. The device is manufactured on a high-performance silicon gate CMOS process and is offered in a lead-free 20-pin LSSOP package.
Internally, the R8C/Tiny core uses a compact 16-bit instruction architecture designed for high instruction efficiency, so typical control tasks need far fewer clock cycles than an 8-bit machine would require. A precision internal oscillator and external crystal support let the designer trade cost and accuracy: a 20 MHz crystal gives deterministic timing for serial links and timers, while the internal clock saves board area when tolerance is acceptable.
Typical applications include industrial control and instrumentation panels, small motor and stepper drive controllers, sensor-hub and building-automation nodes, LED lighting controllers, battery-powered handheld equipment, and low-cost serial interface bridges that need a 10-bit ADC for analog front-end monitoring.
When designing around this part, plan the 20-pin LSSOP footprint carefully: the analog supply and ground pins, oscillator pins, and the four ADC channels are all routed to specific pins, and the low pin count leaves limited room for dedicated debug or programming headers. Use the pin assignment table in the manufacturer datasheet when assigning PCB tracks and keep analog traces away from the oscillator and serial lines.
This page brings together the manufacturer part details, package and ordering information, verified distributor availability data, and a parameter-by-parameter comparison with same-family R8C/1A devices so you can identify the exact drop-in choice for an existing design without redrawing the PCB.
Аналоги без доработки для R5F211A3SP#U0 — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с R5F211A3SP#U0 (тот же форм-фактор и посадочное место) — отличается по Package, CPU Core, Operating Temperature Range, Pin Count, Supply Voltage.
R5F211A4SP#U0
✅ Прямая замена ⚠️ Характеристики не провереныУточнить цену
Открыть даташит →R5F211A2SP#U0
✅ Прямая замена ⚠️ Характеристики не провереныУточнить цену
Открыть даташит →R5F211A1SP#U0
✅ Прямая замена ⚠️ Характеристики не провереныУточнить цену
Открыть даташит →R5F211A0SP#U0
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
R5F211A3SP#UB
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
R5F211A3SP#U0 Максимальные параметры и электрические характеристики
| CPU Core | R8C/Tiny (R8C/1A group) |
| Word Size | 16-bit |
| Instruction Set | CISC |
| Максимальная тактовая частота | 20 MHz |
| Flash Program Memory | 12 KB (12K x 8) |
| Internal RAM | 768 bytes |
| Data Flash | Not present (R8C/1A group) |
| A/D Converter | 10-bit, 4 channels |
| Рабочее напряжение питания | 2.7 V to 5.5 V |
| Диапазон рабочих температур | -20 C to +85 C |
| Корпус | 20-pin LSSOP (PLSP0020JB-A) |
| Число выводов | 20 |
| Тип монтажа | Surface mount |
| Serial Peripherals | I2C, SIO, SSU, UART/USART |
| Process Technology | High-performance silicon gate CMOS |
| Lead-Free Status | Pb-free |
| Product Series | R8C/1x, 16-bit single-chip microcomputer |
Руководство по цоколевке R5F211A3SP#U0 в корпусе 20-pin lssop (plsp0020jb-a)
Цоколевка для R5F211A3SP#U0 (корпус 20-pin lssop (plsp0020jb-a)). Эта цифровая ИС включает выводы GPIO, интерфейсы связи (UART, SPI, I2C) и выводы питания. Обратитесь к техническому описанию производителя для альтернативных функций выводов и вариантов конфигурации. Необходимо для проектирования встраиваемых систем и трассировки печатных плат.
Нет подробных данных о распиновке для R5F211A3SP#U0.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
R5F211A3SP#U0 подходит для 6 применениеs: Industrial Control and Instrumentation Panels, Small Motor and Stepper Drive Controllers, Sensor Hubs and Building Automation Nodes, LED Lighting and Display Control, Battery-Powered Handheld and Metering Devices, Serial Interface Bridges and Data Acquisition.
Industrial Control and Instrumentation Panels
The R5F211A3SP#U0 suits compact HMI and instrument-controller boards because a 16-bit R8C/Tiny core at 20 MHz executes motor, menu, and logging tasks efficiently within the 12 KB flash budget. Its 4-channel 10-bit A/D converter reads pressure, temperature, or potentiometer inputs directly, while UART/USART handles host or HMI panel links and I2C reaches panel expanders and EEPROMs. Because the part is specified from 2.7 V to 5.5 V and -20 C to +85 C, one board family can serve 3.3 V and 5 V industrial panels, and the 20-pin LSSOP keeps the footprint small for panel-mount enclosures.
Рекомендуется
Small Motor and Stepper Drive Controllers
In compact stepper or brushless DC drive modules, the R5F211A3SP#U0 delivers precise 16-bit timing from its 20 MHz R8C/Tiny core, which is valuable for step-rate generation and closed-loop position counting. The 4-channel 10-bit A/D converter can monitor current-sense or thermistor feedback, and the SSU and SIO ports drive encoders or stepper drivers without extra logic. Because the device is a lead-free 20-pin LSSOP, it fits the small motor-control PCB real estate typical of printer, scanner, and appliance modules, and the 2.7 V to 5.5 V range allows a single supply topology across models.
Рекомендуется
Sensor Hubs and Building Automation Nodes
The R5F211A3SP#U0 works as a low-cost node in building automation and environmental monitoring networks: the 4-channel 10-bit A/D converter reads thermistors, light sensors, and occupancy inputs, while I2C attaches to external temperature sensors or EEPROM configuration storage. Because the R8C/1A core provides 16-bit arithmetic at up to 20 MHz with only 12 KB of flash, the node can run protocol stacks, debounce logic, and periodic reporting simultaneously, and the wide 2.7 V to 5.5 V range simplifies powering from 3.3 V bus-powered devices. Its 20-pin LSSOP outline supports very small DIN-rail or wireless-module daughterboards.
Рекомендуется
LED Lighting and Display Control
For LED driver and display sequencer boards, the R5F211A3SP#U0 provides 16-bit PWM-capable timer resources, a 20 MHz clock for accurate dimming updates, and a UART/USART channel for receiving lighting commands from a master controller. The 4-channel 10-bit A/D converter is useful for sensing current feedback or a temperature sensor on an LED board to derate brightness. Its 20-pin LSSOP package leaves board area for the driver stage, and the 2.7 V to 5.5 V operating range allows logic to be derived directly from the LED driver supply, simplifying the power tree on cost-sensitive lighting products.
Рекомендуется
Battery-Powered Handheld and Metering Devices
In handheld meters and low-power measurement products, the R5F211A3SP#U0 offers 16-bit computation at 20 MHz so measurement and display-refresh routines complete quickly, allowing the duty cycle to be kept short and average battery drain low. The 4-channel 10-bit A/D converter handles the analogue front end of a meter without an external ADC, and I2C or UART/USART connects to a display driver or wireless module. The wide 2.7 V to 5.5 V supply range covers single-cell and fixed 3.3 V rails, and the compact 20-pin LSSOP is well suited to handheld enclosures where every square millimetre matters.
Рекомендуется
Serial Interface Bridges and Data Acquisition
The R5F211A3SP#U0 is a natural fit for protocol-conversion and data-acquisition front ends because it combines I2C, SIO, SSU, and UART/USART in one 20-pin device, letting one small board translate between a host UART and an I2C sensor bus. The 4-channel 10-bit A/D converter supports direct acquisition of analogue channels such as transducers or potentiometer feedback, and the 12 KB flash budget accommodates a protocol state machine plus calibration tables. Because the supply range is 2.7 V to 5.5 V, the same converter board can sit between legacy 5 V RS-485 equipment and modern 3.3 V sensor networks.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для R5F211A3SP#U0 — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | R5F211A4SP#U0 | R5F211A2SP#U0 | R5F211A1SP#U0 | R5F211A0SP#U0 | R5F211A3SP#UB |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 20-pin LSSOP (PLSP0020JB-A) | 20-pin LSSOP (PLSP0020JB-A) - same | 20-pin LSSOP (PLSP0020JB-A) - same | 20-pin LSSOP (PLSP0020JB-A) - same | 20-pin LSSOP (PLSP0020JB-A) - same | 20-pin LSSOP (PLSP0020JB-A) - same |
| CPU Core / Architecture | R8C/Tiny, 16-bit CISC | R8C/Tiny, 16-bit CISC | R8C/Tiny, 16-bit CISC | R8C/Tiny, 16-bit CISC | R8C/Tiny, 16-bit CISC | R8C/Tiny, 16-bit CISC |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| A/D Converter | 10-bit, 4 channels | 10-bit, 4 channels | 10-bit, 4 channels | 10-bit, 4 channels | 10-bit, 4 channels | 10-bit, 4 channels |
| Operating Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Serial Peripherals | I2C, SIO, SSU, UART/USART | I2C, SIO, SSU, UART/USART | I2C, SIO, SSU, UART/USART | I2C, SIO, SSU, UART/USART | I2C, SIO, SSU, UART/USART | I2C, SIO, SSU, UART/USART |
| Data Flash | Not present (R8C/1A group) | Not present (R8C/1A group) | Not present (R8C/1A group) | Not present (R8C/1A group) | Not present (R8C/1A group) | Not present (R8C/1A group) |
Ключевые отличия
- Larger code and data memory than the entry-level R8C/1A devices (против R5F211A2SP#U0)
- 16-bit core speed and arithmetic at a modest 20 MHz (против C8051F310R)
- Integrated multi-protocol serial set in a 20-pin package (против ATXMEGA8E5-MNR)
- Wider supply range than a typical 3.3 V-only modern MCU (против STM32F103C6T7ATR)
Заметки по проектированию
The 20-pin LSSOP footprint is the primary constraint in this design. Follow the PLSP0020JB-A land pattern exactly, including pad length and the 0.5 mm lead pitch, and keep the analog supply decoupling capacitor within a few millimetres of the Vcc pins. Route the oscillator pins as a short, symmetric pair away from the ADC input traces and away from any switching node, since crystal circuits pick up noise that shows up as jitter in the UART/USART output.
Estimated supply current budget for a typical design: about 4 mA active at 5 V / 20 MHz for the core and peripherals, plus roughly 1 mA for the 10-bit A/D converter during conversion and about 2 mA through a 100 ohm analog input network. Estimated total active draw is near 5-7 mA at 5 V, giving about 25-35 mW of dissipation in the LSSOP. Estimated: the LSSOP junction-to-ambient resistance is around 90 C/W for a modest 2-layer board, so at 30 mW the estimated rise is under 3 C and no heat sinking is required.
The R8C/1A group has no data flash, so code that expects re-programmable parameter storage at runtime will not work. Store calibration constants in the internal flash area using the linker section the datasheet defines, or add an external I2C EEPROM. Also avoid driving any pin above the 5.5 V maximum, and remember the ADC input range is limited to the supply voltage, so a 5 V rail cannot accept a 0-10 V industrial signal without external scaling and protection.
For analog measurement accuracy, use a dedicated analog ground reference for the ADC return path and connect it to the digital ground at a single point near the device. Place an RC anti-alias filter on each ADC input, for example 1 kohm in series with 10 nF to ground, which also limits sampling-charge kickback from the sampling capacitor. Verify the resulting source impedance against the recommended maximum in the manufacturer datasheet, since an over-aggressive filter capacitor can slow the conversion settling time.
Информация о соответствии
The part is listed as Pb-free by distributors and is offered in a lead-free 20-pin LSSOP package. RoHS, REACH, halogen-free, and conflict-minerals status are not stated for this ordering code and are therefore recorded as unknown; the manufacturer product page should be consulted for the latest declarations.
