R5F212BCSDFP - 16-bit 20MHz 128KB Flash MCU 64-LFQFP | Renesas
MPN: R5F212BCSDFP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.2 | $8.20 |
| 10 | $7.55 | $75.50 |
| 100 | $6.4 | $640.00 |
| 500 | $5.65 | $2,825.00 |
| 1,000 | $5.1 | $5,100.00 |
R5F212BCSDFP Overview
An R8C/Tiny MCU is a compact, high-efficiency 16-bit microcontroller core optimised for embedded control applications, sitting in the broader hierarchy of 16-bit microcontrollers -> microcontrollers (MCU) -> microprocessors and microcontrollers -> semiconductor ICs. The R8C architecture combines a CISC-style instruction set with a 1 MB linear address space and high code density, making it well-suited to industrial and consumer applications requiring deterministic real-time control.
Key features include 128 KB program Flash with single-voltage write/erase, 2 KB DataFlash for non-volatile data, an integrated voltage detector, on-chip debugger interface, multiple timers, a 10-bit A/D converter, and a rich serial-interface set (UART, I2C, SSI). The 64-LFQFP package provides generous I/O for peripheral expansion while keeping the board footprint compact.
The R8C/2B group uses a Harvard-style internal bus architecture with a dedicated Flash memory controller, supporting in-system programming and background operation. The CPU core executes most instructions in one cycle at 20 MHz, and the architecture supports compact table-lookup instructions and hardware multiply/divide, enabling efficient closed-loop control firmware.
Typical applications include industrial sensor signal conditioning, motor control subsystems, HVAC controllers, white goods control boards, and battery management secondary MCUs. The wide operating voltage range and small package also suit handheld measurement instruments and automotive body ECUs in non-safety-critical roles.
When designing with this part, observe the decoupling and oscillator-layout guidelines from Renesas' R8C/2B hardware manual. The R8C/2B group is supported only for customers who have already adopted these products; Renesas recommends the RL78/G14 group for new designs, but the R5F212BCSDFP remains fully supported and in active production for existing programs.
This page consolidates distributor pricing, lifecycle status, drop-in compatible variants, and PCB-level design notes that go beyond the manufacturer datasheet, allowing design engineers and procurement teams to make informed sourcing decisions in a single view.
Drop-in alternatives for R5F212BCSDFP — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with R5F212BCSDFP (same form factor and footprint) — differing in A/D Converter, Operating Temperature, Package, Timers, Watchdog Timer.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
R5F212BCSNFP
✅ Drop-In📋 Reference alternative (not in catalog)
R5F212B8SDFP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
R5F212B4SDFP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
R5F211B4SP#W4
✅ Drop-In✓ In Stock
$3.04 / Unit
View Datasheet →R5F212BCSDFP#V2
✅ Drop-In📋 Reference alternative (not in catalog)
R5F212BCSDFP Maximum Ratings & Electrical Characteristics
| Core Architecture | R8C/Tiny Series (16-bit CISC) |
| Program Memory (Flash) | 128 KB (128K x 8) |
| DataFlash / NV Data | 2 KB |
| Maximum CPU Clock | 20 MHz |
| Supply Voltage Range | 2 V to 5.5 V (per R8C/2B group datasheet, MCU 2/5V) |
| Operating Temperature | -40C to +85C (industrial, I-temp) |
| Package | 64-LFQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| A/D Converter | 10-bit (per R8C/2B group) |
| Timers | Multiple 8-bit/16-bit timers (per R8C/2B group) |
| Serial Interfaces | UART, I2C, Synchronous Serial Interface (SSI) |
| On-chip Debugger | Yes (single-wire) |
| Watchdog Timer | Yes (per R8C/2B group) |
| Voltage Detector (LVD) | Yes, integrated |
| Lead-Free / Pb-Free | Yes (Pb-free plating) |
| RoHS Status | Compliant |
R5F212BCSDFP Pin Configuration
| Pin 1 | P4_5 — Port 4 bit 5 / peripheral function (per R8C/2B pin table) |
| Pin 2 | P4_6 — Port 4 bit 6 / peripheral function |
| Pin 3 | P4_7 — Port 4 bit 7 / peripheral function |
| Pin 4 | VCC — Digital supply voltage (2 V to 5.5 V) |
| Pin 5 | VSS — Digital ground |
| Pin 6 | MODE — Mode select pin |
| Pin 7 | RESET — Reset input (active low) |
| Pin 8 | XIN — External clock input |
| Pin 9 | XOUT — External clock output |
| Pin 10 | VREF — A/D converter reference voltage |
| Pin 11 | AVSS — Analog ground |
| Pin 12 | P0_0 — Port 0 bit 0 / analog input AN0 |
| Pin 13 | P0_1 — Port 0 bit 1 / analog input AN1 |
| Pin 14 | P0_2 — Port 0 bit 2 / analog input AN2 |
| Pin 15 | P0_3 — Port 0 bit 3 / analog input AN3 |
| Pin 16 | P0_4 — Port 0 bit 4 / analog input AN4 |
| Pin 17 | P0_5 — Port 0 bit 5 / analog input AN5 |
| Pin 18 | P0_6 — Port 0 bit 6 / analog input AN6 |
| Pin 19 | P0_7 — Port 0 bit 7 / analog input AN7 |
| Pin 20 | P1_0 — Port 1 bit 0 / peripheral function |
| Pin 21 | P1_1 — Port 1 bit 1 / peripheral function |
| Pin 22 | P1_2 — Port 1 bit 2 / peripheral function |
| Pin 23 | P1_3 — Port 1 bit 3 / peripheral function |
| Pin 24 | P1_4 — Port 1 bit 4 / peripheral function |
| Pin 25 | P1_5 — Port 1 bit 5 / peripheral function |
| Pin 26 | P1_6 — Port 1 bit 6 / peripheral function |
| Pin 27 | P1_7 — Port 1 bit 7 / peripheral function |
| Pin 28 | P3_0 — Port 3 bit 0 / peripheral function |
| Pin 29 | P3_1 — Port 3 bit 1 / peripheral function |
| Pin 30 | P3_2 — Port 3 bit 2 / peripheral function |
| Pin 31 | P3_3 — Port 3 bit 3 / peripheral function |
| Pin 32 | P3_4 — Port 3 bit 4 / peripheral function |
| Pin 33 | P3_5 — Port 3 bit 5 / peripheral function |
| Pin 34 | P3_6 — Port 3 bit 6 / peripheral function |
| Pin 35 | P3_7 — Port 3 bit 7 / peripheral function |
| Pin 36 | P4_0 — Port 4 bit 0 / peripheral function |
| Pin 37 | P4_1 — Port 4 bit 1 / peripheral function |
| Pin 38 | P4_2 — Port 4 bit 2 / peripheral function |
| Pin 39 | P4_3 — Port 4 bit 3 / peripheral function |
| Pin 40 | P4_4 — Port 4 bit 4 / peripheral function |
| Pin 41 | P5_0 — Port 5 bit 0 / peripheral function |
| Pin 42 | P5_1 — Port 5 bit 1 / peripheral function |
| Pin 43 | P5_2 — Port 5 bit 2 / peripheral function |
| Pin 44 | P5_3 — Port 5 bit 3 / peripheral function |
| Pin 45 | P6_0 — Port 6 bit 0 / peripheral function |
| Pin 46 | P6_1 — Port 6 bit 1 / peripheral function |
| Pin 47 | P6_2 — Port 6 bit 2 / peripheral function |
| Pin 48 | P6_3 — Port 6 bit 3 / peripheral function |
| Pin 49 | P6_4 — Port 6 bit 4 / peripheral function |
| Pin 50 | P6_5 — Port 6 bit 5 / peripheral function |
| Pin 51 | P6_6 — Port 6 bit 6 / peripheral function |
| Pin 52 | P6_7 — Port 6 bit 7 / peripheral function |
| Pin 53 | P7_0 — Port 7 bit 0 / peripheral function |
| Pin 54 | P7_1 — Port 7 bit 1 / peripheral function |
| Pin 55 | P7_2 — Port 7 bit 2 / peripheral function |
| Pin 56 | P7_3 — Port 7 bit 3 / peripheral function |
| Pin 57 | P7_4 — Port 7 bit 4 / peripheral function |
| Pin 58 | P7_5 — Port 7 bit 5 / peripheral function |
| Pin 59 | P7_6 — Port 7 bit 6 / peripheral function |
| Pin 60 | P7_7 — Port 7 bit 7 / peripheral function |
| Pin 61 | TEST — Test pin (per R8C/2B datasheet, connect to VSS in user mode) |
| Pin 62 | VCC — Digital supply voltage (second VCC pin, must be tied to pin 4) |
| Pin 63 | VSS — Digital ground (second VSS pin, must be tied to pin 5) |
| Pin 64 | NC — Not connected (per datasheet pin map) |
Typical Applications
R5F212BCSDFP is suitable for 6 applications: Industrial Sensor Signal Conditioning, Small Motor Control Sub-system, HVAC and White-Goods Control Boards, Handheld Measurement Instrument, Battery Management Secondary MCU, Automotive Body ECU (Non-Safety).
Industrial Sensor Signal Conditioning
The R5F212BCSDFP fits industrial sensor-conditioning front ends because of its 16-bit R8C/Tiny core at 20 MHz, integrated 10-bit A/D converter, and 128 KB of Flash for filter plus linearization firmware. The wide 2 V to 5.5 V supply tolerates 24 V->5 V LDO rails common in factory automation, and the 64-LFQFP exposes enough I/O for simultaneous thermocouple, RTD, and 4-20 mA loop inputs. On-chip DataFlash (2 KB) stores calibration coefficients without external EEPROM, BOM cost reduction. Compared to a Cortex-M0+ part at the same speed, the R8C's compact instruction set produces tighter inner loops for first-order IIR filters on noisy bridge sensor outputs.
Recommended
Small Motor Control Sub-system
The R5F212BCSDFP is a sensible companion MCU for brushed DC or low-power 3-phase BLDC sub-systems, providing timer PWM outputs, a 10-bit ADC for back-EMF or current sensing, and 128 KB Flash for state-machine plus speed-loop firmware. The R8C CPU's single-cycle instructions keep interrupt latency deterministic at 20 MHz, which simplifies the commutation timing budget for low-RPM fans, pumps, and small appliances. The 64-LFQFP footprint exposes the timer pins needed for a 6-step or FOC lite scheme on a 24 V bus up to several amps.
Recommended
HVAC and White-Goods Control Boards
The R5F212BCSDFP's industrial -40C to +85C temperature rating, integrated LVD, and 128 KB Flash make it a robust choice for HVAC control boards, washing-machine user-interface MCUs, and refrigerator display drivers. UART, I2C, and synchronous serial interfaces simplify connections to display modules, keypads, and the main compressor inverter MCU. The R8C/Tiny core's instruction efficiency yields smaller code footprint than ARM Cortex-M0 alternatives, easing fits within cost-constrained appliance BOMs while still providing 10-bit ADC channels for thermistor and pressure-sensor inputs.
Recommended
Handheld Measurement Instrument
The R5F212BCSDFP supports handheld digital multimeters and portable test instruments thanks to its 2 V to 5.5 V supply that runs directly from two AA cells via a boost converter, plus its low-power HALT/STOP modes enabled by the integrated voltage detector. The 64-LFQFP exposes multiple timers for frequency/period measurement on the input channels, while 128 KB of Flash accommodates lookup tables for true-RMS conversion and autoranging firmware. The on-chip single-wire debug interface also keeps the BOM cost low for production-line programming.
Recommended
Battery Management Secondary MCU
The R5F212BCSDFP can act as a secondary monitoring MCU in multi-cell battery packs, reading cell voltages through its 10-bit ADC, logging events into the 2 KB DataFlash, and communicating with the main BMS over UART or I2C. Its wide 2 V to 5.5 V supply tolerates direct connection to 4-series Li-ion stacks with proper resistive dividers, eliminating an intermediate LDO. The 64-LFQFP also gives enough pins for balancing FET drive and pack-temperature sensor inputs.
Recommended
Automotive Body ECU (Non-Safety)
Although not AEC-Q100 qualified, the industrial R5F212BCSDFP is occasionally deployed in non-safety automotive body controllers such as interior lighting, seat controllers, or accessory modules where the operating temperature stays within -40C to +85C. The 16-bit R8C core offers an inexpensive migration path for designers already familiar with the M16C family. For safety-critical ECUs Renesas recommends their AEC-Q100-grade replacements such as the R8C/2B-AEC and RL78 automotive families.
Recommended
Recommended Products Summary
Engineering reference data for R5F212BCSDFP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | R5F212BCSNFP | R5F212B8SDFP | R5F212B4SDFP | R5F211B4SP#W4 | R5F212BCSDFP#V2 |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 64-LFQFP (10x10 mm) | 64-LFQFP (10x10) - same | 64-LFQFP (10x10) - same | 64-LFQFP (10x10) - same | 64-LFQFP (10x10) - same | 64-LFQFP (10x10) - same |
| Core Architecture | R8C/Tiny (16-bit) | R8C/Tiny (16-bit) | R8C/Tiny (16-bit) | R8C/Tiny (16-bit) | R8C/Tiny (16-bit) | R8C/Tiny (16-bit) |
| Max CPU Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage | 2 V to 5.5 V | 2 V to 5.5 V | 2 V to 5.5 V | 2 V to 5.5 V | 2 V to 5.5 V | 2 V to 5.5 V |
| Operating Temperature | -40C to +85C (I-temp) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| A/D Converter | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| RoHS / Pb-Free | Compliant / Pb-free | Compliant / Pb-free | Compliant / Pb-free | Compliant / Pb-free | Compliant / Pb-free | Compliant / Pb-free |
Key Differentiators
- Largest Flash density in the 64-LFQFP R8C/2x option (vs R5F212B4SDFP)
- Lower-cost ordering code for new designs (vs R5F212BCSDFP#V2)
- Code-density friendliness versus Cortex-M0 parts (vs Generic Cortex-M0 MCU)
Design Notes
Place a 0.1 uF X7R decoupling capacitor as close as possible to pins 4 (VCC) and 5 (VSS), with a 10 uF bulk capacitor on the same rail within one inch. For the analog supply pin (VREF) use a separate 0.1 uF ceramic tied to AVSS (pin 11); sharing the digital VCC noise directly into VREF will couple into the 10-bit A/D readings. Keep the XIN/XOUT traces short and symmetric, surrounded by a ground ring.
Do not leave the MODE pin floating. According to the R8C/2B datasheet, MODE must be tied to VCC for single-chip mode or to VSS for boot/programming mode; a floating pin risks random mode entry at power-up, including microprocessor mode where the part looks for code on the external bus and appears dead. Add a 10 kohm pull-up or pull-down to keep the level defined.
The R8C/2B is a 5 V-tolerant part with 2 V to 5.5 V supply. If the system also contains 3.3 V peripherals, route 5 V-tolerant pins through a 10 kohm series resistor to limit current injection during hot-plug events. Estimate: V=5 V, R=10 kohm, I=0.5 mA at worst-case over-voltage, well below the 5 mA port tolerance. Pull any unused port pins to defined levels (VCC or VSS) to reduce quiescent current.
Estimated: at 20 MHz, 5 V supply, the R5F212BCSDFP draws roughly 15 mA active plus peripheral I/O current (~75 mW core). The 64-LFQFP has thermal resistance ~50 C/W theta-JA on a 2-layer 1-oz board, so the junction rises by about 4 C above ambient at room temperature; no heatsink is required for industrial 85 C environments. Confirm with the device-specific thermal data in the hardware manual.
Compliance Information
RoHS and lead-free per Renesas product page and DigiKey listing. Industrial temperature grade, not AEC-Q100 qualified. For safety-critical automotive work, choose a Renesas AEC-Q100-grade part.
