R5F211B1SP#U0 - 16-Bit 20MHz R8C/1B MCU, 4KB Flash, 20-LSSOP | Renesas
MPN: R5F211B1SP#U0 ✓ AktifR5F211B1SP#U0 Ringkasan
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, timers, serial interfaces, analog converters and I/O ports onto one die. In the supply-chain hierarchy, the R5F211B1SP#U0 sits as an embedded microcontroller within integrated circuits, and within Renesas' portfolio it belongs to the R8C family, R8C/1x series, 1B group, built on a high-performance silicon gate CMOS process. Renesas positions the R8C/1B group for customers already adopted to these products and recommends the RL78/G12 group for new designs.
Key features visible in the ordering information include a 10-bit A/D converter, on-chip DataFlash support, and a watchdog timer timeout option, making the device a self-contained control node rather than a pure logic device. The 2.7 V to 5.5 V operating range allows the same design to work from a 3 V lithium cell or from a regulated 5 V rail, and the -20 °C to +85 °C grade suits cost-constrained industrial and consumer equipment.
Because the R8C core is a compact 16-bit architecture with efficient instruction set and dedicated multiplier hardware for 16-bit operations, the R5F211B1SP#U0 delivers more arithmetic throughput per clock than 8-bit parts while keeping BOM cost low. Flash memory permits in-field reprogramming, so field updates can be handled without socketed parts.
Typical applications include small motor and relay control boards, simple serial-interface sensor hubs, industrial keypads and HMI panels, LED signage and lighting controllers, battery-powered instrumentation, and compact consumer appliances where a full application processor would be excessive.
When designing around this device, keep the operating voltage inside 2.7 V to 5.5 V with margin for transient dips, and confirm that the LSSOP-20 land pattern is available on the PCB supplier's library since the 4.4 mm body width differs from standard SSOP-20. Decoupling and oscillator placement must follow the pin-assignment table in the manufacturer datasheet.
This page consolidates the orderable part information, drop-in alternatives in the same 20-LSSOP footprint, a parameter-by-parameter comparison, and practical layout and firmware notes that are not collected in one place on the manufacturer datasheet.
Alternatif penggantian untuk R5F211B1SP#U0 — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian R5F211B1SP#U0 (sama faktor bentuk dan footprint) — berbeda di dalam CPU Core, Operating Temperature Range, Package, Product Type, Program Memory Size.
R5F211B1SP#W4
✅ Drop-InKontak untuk harga
Lihat Datasheet →R5F211B2SP#U0
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →R5F211B4SP#U0
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →R5F211B6SP#U0
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
R5F211A4SP#U0
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →R5F211A6SP#U0
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
R5F211B1SP#U0 Rating Maksimal & Karakteristik Listrik
| Device Type | 16-bit Single-Chip Microcomputer (MCU) |
| CPU Core | R8C/Tiny Series 16-bit core |
| Series / Group | R8C family, R8C/1x series, 1B Group |
| Frekuensi Bawah Maximum | 20 MHz |
| Program Memory (FLASH) | 4 KB (4K x 8) |
| Data Memory (SRAM) | 384 Byte |
| Operating Voltage Range | 2.7 V to 5.5 V |
| A/D Converter | 10-bit |
| Rentang Suhu Kerja | -20 °C to +85 °C |
| Paket | LSSOP-20 (PLP, 20P2F-A), 4.4 mm body width |
| Tipe Mounting | Surface Mount |
| Process Technology | High-performance silicon gate CMOS |
| Non-Volatile Data Storage | DataFlash supported |
| Watchdog Timer | Yes (WDTO ordering option) |
| Status RoHS | RoHS compliant |
| Lead-Free Termination | Pb-Free |
R5F211B1SP#U0 lssop-20 (plp, 20p2f-a), 4.4 mm body width Diamant Konfigurasi Panduan
Konfigurasi pin untuk R5F211B1SP#U0 (lssop-20 (plp, 20p2f-a), 4.4 mm body width pakai pakai). IC digital ini termasuk GPIO, antarmuka komunikasi (UART, SPI, I2C), dan pin kuasa. Lihat datasheet produsen untuk fungsi pin alternatif dan opsi konfigurasi. Penting untuk desain sistem pengemasan dan PCB.
Tidak ada data diatribut pin yang tersedia untuk R5F211B1SP#U0.
Lihat ke: datasheet produk untuk konfigurasi pin penuh.
Aplikasi Umum
R5F211B1SP#U0 cocok untuk 6 aplikasis: Small Motor and Relay Control Boards, Battery-Powered Sensor Hubs, Industrial Keypads and HMI Panels, LED Signage and Lighting Controllers, Serial Interface Gateways and Hubs, Consumer Appliance Sub-Control Modules.
Small Motor and Relay Control Boards
The R5F211B1SP#U0 fits compact stepper and DC motor controllers because its 16-bit R8C/Tiny core at 20 MHz handles position counting, duty-cycle generation and debounce logic far more comfortably than an 8-bit part at the same clock. The 10-bit A/D converter can supervise motor current or supply voltage without an external analog front end, while the 4 KB of FLASH and 384 bytes of SRAM are sufficient for a closed-loop routine, a step table and a short command parser. Because the part runs from 2.7 V to 5.5 V, the same design serves both 3 V battery and 5 V regulated builds. A practical constraint is flash size: if the motion profile table plus safety checks exceed 4 KB, move to R5F211B4SP#U0, which keeps the identical 20-pin LSSOP footprint.
Direkomendasikan
Battery-Powered Sensor Hubs
For compact battery-operated instrumentation, the R5F211B1SP#U0 combines a 2.7 V lower operating limit with flash program memory, so firmware can be updated in the field and the unit can run directly from a 3 V lithium cell or a regulated 3.3 V rail. The 10-bit A/D converter handles analog sensors such as thermistors, dividers and pressure bridges without an external converter, and the 384 bytes of SRAM is workable for short sampling windows with on-chip data buffering. The 20-pin LSSOP with a 4.4 mm body width fits densely packed instrument housings where a 28-pin or larger package would not. Current consumption planning should be done against the datasheet's sleep-mode figures, and supply droop during transmit bursts must keep the rail above 2.7 V to avoid erratic execution.
Direkomendasikan
Industrial Keypads and HMI Panels
Industrial keypads and small HMI panels need debounced matrix scanning, LED indication and a serial link to a host controller, all on a tight board area and budget. The R5F211B1SP#U0 provides a 16-bit core at 20 MHz for responsive scan loops, enough flash for multi-layer menu logic and event logging, and DataFlash support for storing configuration such as station ID or calibration values. Its -20 °C to +85 °C industrial temperature grade covers factory-floor ambient conditions, and the 2.7 V to 5.5 V range allows direct connection to a 5 V industrial bus-transceiver supply. Because the LSSOP-20 body is only 4.4 mm wide, verify that your PCB assembler can place and inspect the fine-pitch leads, and follow the layout guidance in the hardware manual for the analog and oscillator pins.
Direkomendasikan
LED Signage and Lighting Controllers
LED signage and architectural lighting controllers need precise timing, current-loop regulation and reliable flash-resident firmware. The R5F211B1SP#U0 at 20 MHz executes PWM generation and dimming fades without taxing the CPU, and the 10-bit A/D converter can read back a supply or current-sense signal for closed-loop brightness regulation. Flash memory permits the same hardware to be deployed across many signage configurations, with the field update path avoiding rework at installation. With only 384 bytes of SRAM, animation buffers must be streamed from flash or generated on the fly rather than held in RAM, and this is where upgrading to R5F211B2SP#U0 or R5F211B4SP#U0 becomes attractive. The 20-pin LSSOP footprint keeps the controller board narrow enough for slim signage housings.
Direkomendasikan
Serial Interface Gateways and Hubs
Protocol-conversion and multi-port I/O hub designs benefit from the 16-bit datapath of the R8C core, which handles byte framing, CRC computation and buffer management with headroom at 20 MHz. The R5F211B1SP#U0 fits gateways that translate between a host UART and discrete digital I/O, using the on-chip A/D converter for supervisory channels and DataFlash for storing device addresses or calibration constants. Because flash can be rewritten in circuit, unit-level configuration is possible at end of line. The main design limit is RAM at 384 bytes, so use double-buffered, interrupt-driven transmission rather than large frame buffers, and move up to R5F211B4SP#U0 if the protocol stack grows. Operating voltage headroom of 2.7 V to 5.5 V simplifies connection to both 3.3 V and 5 V transceivers.
Direkomendasikan
Consumer Appliance Sub-Control Modules
In appliances such as small kitchen equipment, water dispensers or fan controllers, the R5F211B1SP#U0 handles motor sequencing, button logic and fault monitoring at minimal cost. The 10-bit A/D converter reads temperature or level sensors for safety interlocks, the watchdog timer gives a hardware recovery path when the UI thread stalls, and flash-based firmware supports in-field bug fixes on deployed units. The 20-pin LSSOP keeps the footprint small enough to mount inside a plastic enclosure without a through-hole connector, and the 2.7 V to 5.5 V range allows direct use of the rectified appliance rail after regulation. Validate that the appliance supply tolerances and motor noise spikes stay inside the device's rating, and keep the analog ground routing short to the sensor reference.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk R5F211B1SP#U0 — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | R5F211B1SP#W4 | R5F211B2SP#U0 | R5F211B4SP#U0 | R5F211B6SP#U0 | R5F211A4SP#U0 | R5F211A6SP#U0 |
|---|---|---|---|---|---|---|---|
| Package | LSSOP-20 (PLP, 20P2F-A) | LSSOP-20 (PLP, 20P2F-A) - same | LSSOP-20 (PLP, 20P2F-A) - same | LSSOP-20 (PLP, 20P2F-A) - same | LSSOP-20 (PLP, 20P2F-A) - same | LSSOP-20 (PLP, 20P2F-A) - same | LSSOP-20 (PLP, 20P2F-A) - same |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| CPU Core | R8C/Tiny Series, 16-bit | R8C/Tiny Series, 16-bit - same | R8C/Tiny Series, 16-bit - same | R8C/Tiny Series, 16-bit - same | R8C/Tiny Series, 16-bit - same | R8C/Tiny Series, 16-bit - same | R8C/Tiny Series, 16-bit - same |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Voltage Range | 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 | 2.7 V to 5.5 V |
| Operating Temperature Range | -20 °C to +85 °C | -20 °C to +85 °C | -20 °C to +85 °C | -20 °C to +85 °C | -20 °C to +85 °C | -20 °C to +85 °C | -20 °C to +85 °C |
| Series / Group | R8C/1x series, 1B Group | R8C/1x series, 1B Group | R8C/1x series, 1B Group | R8C/1x series, 1B Group | R8C/1x series, 1B Group | R8C/1x series, 1B Group | R8C/1x series, 1B Group |
Diferensiator Kunci
- 16-bit datapath at 20 MHz in a 20-pin package (vsR5F211A4SP#U0)
- Field-updatable FLASH program memory instead of mask ROM (vsR5F211B6SP#U0)
- Single 2.7 V to 5.5 V supply covering 3 V and 5 V designs (vsR5F211B1SP#W4)
- Integrated 10-bit A/D converter and watchdog timer (vsR5F211A6SP#U0)
Catatan Desain
The LSSOP-20 body is only 4.4 mm wide, so confirm that your PCB library land pattern matches the PLP 20P2F-A outline rather than a generic SSOP-20 footprint; a reused SSOP-20 symbol can create lead-to-pad shorts or solder bridging on fine pitch. Place the decoupling capacitor directly across the Vcc and GND pins as shown in the hardware manual's recommended layout, and keep the analog input traces short and away from the oscillator pins to preserve the accuracy of the 10-bit A/D converter.
The device operates from 2.7 V to 5.5 V, so supply headroom is a real design constraint in battery products. Estimated: with a 3.0 V cell that falls to 2.75 V under load and a core current draw of 5 mA at 20 MHz, the regulator must still deliver a clean rail above the 2.7 V minimum plus ripple margin at the MCU pin. Provide bulk capacitance near the source and confirm that brown-out behaviour is acceptable, since operation below 2.7 V risks unpredictable code execution rather than a clean reset.
With only 384 bytes of SRAM and 4 KB of FLASH, runaway buffer usage is the most common cause of failure on this part. Avoid large static buffers and frame copies; use the stack discipline and shared-memory patterns documented in the R8C/1x hardware manual, and enable the watchdog timer so a firmware fault causes a reset rather than a hung controller. When a feature upgrade pushes past 4 KB of code, move to R5F211B2SP#U0 or R5F211B4SP#U0 in the identical footprint instead of adding a second MCU.
Do not treat the R8C/1B group as a general new-design platform: Renesas states that this group is supported for customers who have already adopted these products and that the RL78/G12 group is recommended for new designs. For a fresh platform with an uncertain five-year production life, evaluate the recommended group first. If an existing R8C design needs more capacity, stay within the R8C/1B family so the toolchain, debugger and peripheral knowledge remain unchanged.
Informasi Konformitas
RoHS compliance and Pb-Free termination are indicated for this device. No AEC-Q100 automotive qualification is published for this part, so it is not suitable for automotive grade requirements without a specifically qualified ordering option. REACH, halogen-free and conflict-minerals declarations are not stated in the product information and are therefore recorded as unknown.
