R5F211A4SP#U0 - 16-Bit 20MHz R8C/1A 16KB Flash MCU | Renesas | 20-LSSOP
부품 번호: R5F211A4SP#U0 ✓ 활성R5F211A4SP#U0 개요
A single-chip microcomputer, or MCU, is a complete computing element that integrates a CPU core, program memory, data memory, I/O ports, timers and clock circuitry on one die. An MCU sits in the hierarchy above a general microprocessor but below a microcomputer system: MCU -> microcomputer -> embedded controller -> semiconductor. Renesas positions the R8C/1A group for designs that have already adopted it and recommends the RL78/G12 group for new projects, yet the R8C remains a proven fit for cost-sensitive, low-power embedded control products.
Key features of the R5F211A4SP include a 20 MHz maximum operating frequency, 16 KB of flash program memory, 1 KB of internal RAM, 13 I/O lines and a 3/5 V operating supply. The R8C/Tiny core delivers 16-bit instruction execution with an 8-bit-oriented internal data path, which keeps code density high while retaining a small die and low system cost.
The device is fabricated on a high-performance silicon gate CMOS process and is packaged as a 20-pin molded-plastic LSSOP. The documented difference between the R8C/1A group and the R8C/1B group is the presence or absence of data flash ROM; the R5F211A4SP sits in the 1A group, which retains data flash for parameter storage and calibration data.
Typical applications include small appliance controllers, sensor and meter front-ends, industrial sensor modules, motor and stepper sequencing, simple HMI panels and low-power battery-operated instruments where a 20-pin footprint, 16 KB of flash and 13 I/O pins match the bill of materials almost exactly.
When designing around this part, verify the internal oscillator tolerance and the peripheral allocation against the target application, and confirm the 20-LSSOP land pattern on your PCB. Because the R8C/1A family is maintained for existing adopters rather than new platforms, confirm long-term availability and consider the RL78/G12 family for designs started from scratch.
This page brings together distributor availability, same-family drop-in replacements, a parameter-by-parameter comparison and practical layout guidance so you can evaluate the R5F211A4SP#U0 against alternatives without pulling together multiple documents.
드롭인 대체품: R5F211A4SP#U0 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: R5F211A4SP#U0 (동일 폼 팩터 및 풋프린트) — 차이점: Package, CPU Core, Process Technology, Operating Temperature Range, Package Width.
R5F211A4SP#V0
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
R5F21324CNSP#U0
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
R5F211A3SP#U0
✅ 드롭인 ⚠️ 사양 미검증가격 문의
데이터시트 보기 →R5F211A2SP#U0
✅ 드롭인 ⚠️ 사양 미검증가격 문의
데이터시트 보기 →R5F211A1SP#U0
✅ 드롭인 ⚠️ 사양 미검증가격 문의
데이터시트 보기 →R5F211A6SP#U0
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
R5F211A4SP#U0 최대 정격 & 전기적 특성
| Device Type | 16-bit single-chip microcomputer (MCU) |
| Series | R8C/1A group, R8C/1x series |
| CPU Core | R8C/Tiny Series 16-bit core |
| Maximum Operating Frequency | 20 MHz |
| Program Memory (Flash) | 16 KB (16K x 8) |
| RAM | 1 KB (1K x 8) |
| Number of I/O | 13 |
| 공급 전압 | 3 V / 5 V |
| Oscillator Type | Internal |
| 패키지 | 20-LSSOP (0.173 in / 4.40 mm width) |
| Process Technology | High-performance silicon gate CMOS |
| Data Flash ROM | Present (R8C/1A group) |
| Packaging | Tube |
| Lead-Free Status | Pb-free |
| Flash Memory Type | Program flash (ROM) |
R5F211A4SP#U0 20-lssop (0.173 in / 4.40 mm width) 핀 구성 가이드
R5F211A4SP#U0(20-lssop (0.173 in / 4.40 mm width) 패키지)의 핀 구성입니다. 이 디지털 IC에는 GPIO, 통신 인터페이스(UART, SPI, I2C), 전원 핀이 포함되어 있습니다. 대체 핀 기능과 구성 옵션은 제조사 데이터시트를 참조하십시오. 임베디드 시스템 설계와 PCB 레이아웃에 필수적입니다.
다음에 대한 상세 핀아웃 데이터 없음: R5F211A4SP#U0.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
R5F211A4SP#U0 적합 용도: 6 애플리케이션s: Industrial Sensor and Meter Front-End, Small Appliance and Kitchen Equipment Control, Battery-Powered Portable Instrument, LED Lighting and Display Sequencing, Simple Motor and Actuator Sequencer, IoT Sensor Node with Local Pre-Processing.
Industrial Sensor and Meter Front-End
The R5F211A4SP#U0 suits measurement modules that must digitize a sensor, apply calibration and drive a display or a serial interface. With 16 KB (16K x 8) of program flash you can hold acquisition routines, a linearization table and a communications stack without external memory, while the 13 general-purpose I/O lines cover discrete inputs, alarm outputs and an LCD segment driver. The R8C/Tiny Series 16-bit core executes the arithmetic needed for calibration maths quickly at 20 MHz, and the 3/5 V supply class means the same board can run from a 5 V rail or a regulated 3.3 V node. Data flash in the R8C/1A group holds field-calibration constants without consuming RAM.
추천
Small Appliance and Kitchen Equipment Control
Compact whitegoods and kitchen appliances need a controller that sequences relays, drives indicators and reads a keypad without a large silicon footprint. The R5F211A4SP#U0 handles this in a 20-LSSOP package that fits tight control boards, and its 16 KB of flash holds a motor sequence table, a temperature profile and a small state machine. The 13 I/O ports are enough for a keypad matrix, a seven-segment or LED bar indicator and a handful of triac or relay drive lines. At 20 MHz the core services timing-critical tasks such as zero-cross detection handling and display refresh, while the internal oscillator removes the cost and layout area of an external crystal.
추천
Battery-Powered Portable Instrument
Handheld meters, data loggers and field test gear operate from limited energy budgets, and the R5F211A4SP#U0 provides a straightforward way to manage that budget. The 3/5 V operating class works with a single-cell-derived 3 V rail or a 5 V pump-up supply, and the R8C/Tiny core delivers 16-bit performance without the clock overhead of larger cores. The 1 KB (1K x 8) of RAM holds measurement buffers and log records, and the 16 KB of flash stores the calibration tables and menu code. Data flash ROM in the R8C/1A group lets the instrument retain user settings and instrument offsets across power cycles, which avoids re-entering configuration after every battery change.
추천
LED Lighting and Display Sequencing
LED sign controllers, architectural lighting hubs and display sequencers need deterministic timing across many channels. The R5F211A4SP#U0 drives LED patterns from timer and interrupt routines at 20 MHz, with the 13 I/O ports multiplexed to LED rows and columns or used to drive a small number of constant-current channels directly. The 16 KB of program flash comfortably stores multiple animation tables and a scheduler, and the R8C/1A data flash holds scene settings so lighting presets survive a power cycle. Because the part runs from 3/5 V, it can be placed next to the LED driver stage without a separate level translator, which simplifies the board and reduces the component count in multi-channel fixtures.
추천
Simple Motor and Actuator Sequencer
Stepper indexers, valve controllers and small linear actuators need accurate step timing plus a modest amount of supervisory logic, which the R5F211A4SP#U0 provides without a large MCU. The 20 MHz R8C/Tiny core generates step and direction timing from timer interrupts with margin for a host command interface, and 13 I/O ports cover step, direction, home limit, enable and fault signalling. The 16 KB of flash holds the motion profile tables and the host protocol, while 1 KB of RAM covers the position counter and status buffer. The 20-LSSOP package keeps the controller small enough to sit beside the driver stage, and the 3/5 V supply class suits both 5 V logic and 3.3 V system rails.
추천
IoT Sensor Node with Local Pre-Processing
A compact IoT sensor node that filters, counts and forwards local events benefits from an MCU that can wake, process and sleep without a large memory system. The R5F211A4SP#U0 handles edge pre-processing such as debouncing, thresholding and simple aggregation before data leaves the node, and its 16 KB of flash holds the radio-side state machine and a small protocol stack. The 13 I/O ports connect to the sensor bus, status indicator and a wake or pairing button, and the 3/5 V supply class fits both coin-cell-derived and USB-derived rails. The R8C/1A data flash retains network credentials and calibration data, so the node does not need to re-provision after a power interruption.
추천
추천 제품 요약
엔지니어링 참조 데이터: R5F211A4SP#U0 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | R5F211A4SP#V0 | R5F21324CNSP#U0 | R5F211A3SP#U0 | R5F211A6SP#U0 |
|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 20-LSSOP (0.173 in / 4.40 mm width) | 20-LSSOP - same footprint | 20-LSSOP - same footprint | 20-LSSOP - same footprint | 20-LSSOP - same footprint |
| CPU Core | R8C/Tiny Series 16-bit | R8C/Tiny Series 16-bit | R8C 16-bit | R8C/Tiny Series 16-bit | R8C/Tiny Series 16-bit |
| Maximum Operating Frequency | 20 MHz | 20 MHz | 20 MHz class | 20 MHz | 20 MHz |
| Program Flash | 16 KB (16K x 8) | 16 KB (16K x 8) | 16 KB | 8 KB | 32 KB |
| Supply Voltage | 3 V / 5 V | 3 V / 5 V | 3 V / 5 V class | 3 V / 5 V | 3 V / 5 V |
| Packing Option | Tube (#U0) | Alternate packing code | Tube (#U0) | Tube (#U0) | Tube (#U0) |
주요 차별점
- Full 16 KB of flash in a 20-pin LSSOP footprint (vs R5F211A3SP#U0)
- Data flash ROM retained for parameter storage (vs R5F21324CNSP#U0)
- Same silicon, alternate packing code for line flexibility (vs R5F211A4SP#V0)
- Headroom to grow without changing the package (vs R5F211A1SP#U0)
설계 노트
The R5F211A4SP#U0 uses a 20-pin LSSOP with a 0.173 in (4.40 mm) body width and a lead pitch that differs from standard 0.6 mm SSOP parts in some families, so copy the land pattern directly from the Renesas package drawing rather than from a generic library symbol. Keep the oscillator and reset nets short, place the decoupling capacitor at the supply pins with a short ground return, and route the 13 I/O lines away from the clock region to avoid coupling noise into the timer-driven functions.
Because the part is specified for 3/5 V operation, the supply tolerance must be checked against the electrical characteristics table in the manufacturer datasheet for both the 3 V and 5 V cases. Estimated: with a 5.0 V rail and an average operating current of 5 mA, dissipation is about 25 mW, so a standard 0805 or 0603 decoupling network with 0.1 uF plus 1 uF ceramic is adequate. Do not use the 3 V figures for a 5 V design without re-checking the input range.
The most common errors on this family are ordering the wrong packing suffix for the assembly line, assuming 16 KB of flash covers the bootloader plus application, and overlooking that the R8C/1A group carries data flash ROM while the R8C/1B group does not. Confirm the #U0 packing code, budget flash for the startup and in-application programming routines, and verify the flash endurance requirements against your parameter-update rate before committing to a design.
Keep the 1 KB RAM-resident working set small and place frequently accessed data structures away from stack growth regions. When driving relays, solenoids or LED strings from the I/O pins, route the drive currents through the connector side of the board and keep the MCU ground reference in a quiet region, adding bulk bulk capacitance at the connector to keep switching transients from coupling back into the 3/5 V rail that feeds the R5F211A4SP#U0.
규정 준수 정보
The part is listed as Pb-free by the manufacturer and by distributors, and the R5F211A4SP datasheet carries a RoHS statement in its quality and environmental information section. RoHS, REACH, halogen-free and conflict-minerals status are recorded as unknown because no explicit per-attribute statement was available for this ordering code.
