R5F21236KFP - 16-Bit 16MHz R8C/23 MCU, 32KB Flash | Renesas
N.º de pieza: R5F21236KFP ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.48 | $3,48 |
| 10 | $3.13 | $31,30 |
| 100 | $2.78 | $278,00 |
| 500 | $2.5 | $1.250,00 |
| 1.000 | $2.22 | $2.220,00 |
R5F21236KFP Descripción general
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory (typically flash), data memory (RAM), and a rich set of peripherals on a single die. The R8C/Tiny core used here belongs to the 16-bit microcontroller family, positioned between 8-bit MCUs (e.g., RL78, PIC16) and 32-bit microcontrollers (e.g., RX, ARM Cortex-M) in the Renesas product hierarchy. Its CISC-style instruction set and 1MB address space make it suitable for compact, deterministic embedded code in cost-sensitive applications.
Key features of the R5F21236KFP include 32KB flash program memory, a 16-bit CPU with high instruction efficiency, on-chip peripherals typical of the R8C/23 group such as timers, serial interfaces, A/D converter, and interrupt controller, plus 1MB linear address space for executing instructions. The 48-pin LQFP package exposes a generous number of GPIO and peripheral pins while keeping board footprint modest. Automotive-grade Pb-free construction supports deployment in commercial vehicle environments.
Technically, the device is built on a high-performance silicon-gate CMOS process. The 16MHz maximum operating frequency, when paired with the R8C CPU core, gives instruction throughput that is well matched to consumer, industrial, and white-goods control tasks. The combination of 32KB flash and 2KB SRAM allows medium-complexity firmware with reasonable data buffering. AEC-Q100-equivalent automotive temperature range and Pb-free finish extend applicability to harsh thermal environments.
Typical applications include home appliances such as washing machines and microwave ovens, HVAC control, white goods and small-motor drive control, automotive body and accessory ECUs (within the part's automotive-grade classification), industrial sensor interfaces, and consumer-device keypad and LED matrix controllers. The R8C/23 group's mature software ecosystem and low BOM cost make it a common choice for high-volume, cost-driven products.
When designing with this MCU, note that R8C/23 is a non-promotion group, meaning Renesas only supports existing adopters. New designs should consider RL78 or RX families for long-term support, but the part remains pin-compatible with other R8C/2x variants for legacy board reuse. Verify supply availability with distributors before committing new production.
Alternativas directas para R5F21236KFP — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con R5F21236KFP (mismo factor de forma y huella) — difiere en Package, Program Memory (Flash).
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
R5F21237KFP
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
R5F21226JFP
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
R5F21234KFP
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
R5F21238KFP
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PIC18F46K22-I/PT
✅ Sustitución directa✓ En stock
$2.32 / unidad
Ver hoja de datos →R5F21236KFP Valores máximos y características eléctricas
| CPU Core | R8C/Tiny (R8C/2x series) |
| Architecture | 16-bit CISC |
| Frecuencia de reloj máxima | 16 MHz |
| Program Memory (Flash) | 32 KB |
| Data Memory (SRAM) | 2 KB |
| Address Space | 1 MB linear |
| Tensión de alimentación | 3 V / 5 V |
| Rango de temperatura de funcionamiento | -40C to +125C |
| Encapsulado | 48-pin LQFP (7x7 mm) |
| Tipo de montaje | Surface Mount |
| Process Technology | High-performance silicon-gate CMOS |
| Pb-Free | Yes (AU PbFree) |
| Peripherals (typical for R8C/23) | Timers, Serial I/F, A/D converter, Interrupt controller |
Configuración de pines de R5F21236KFP
| Pin 1 | VREF — A/D converter reference voltage |
| Pin 2 | AVSS — Analog ground |
| Pin 3 | P4_7/AN7 — GPIO / analog input 1 |
| Pin 4 | P4_6/AN6 — GPIO / analog input 2 |
| Pin 5 | P4_5/AN5 — GPIO / analog input 3 |
| Pin 6 | P4_4/AN4 — GPIO / analog input 4 |
| Pin 7 | P4_3/AN3 — GPIO / analog input 5 |
| Pin 8 | P4_2/AN2 — GPIO / analog input 6 |
| Pin 9 | P4_1/AN1 — GPIO / analog input 7 |
| Pin 10 | P4_0/AN0 — GPIO / analog input 8 |
| Pin 11 | P3_7 — GPIO |
| Pin 12 | P3_6 — GPIO |
| Pin 13 | P3_5 — GPIO |
| Pin 14 | P3_4 — GPIO |
| Pin 15 | P3_3 — GPIO |
| Pin 16 | P3_2 — GPIO |
| Pin 17 | P3_1 — GPIO |
| Pin 18 | P3_0 — GPIO |
| Pin 19 | MODE — Mode select |
| Pin 20 | RESET — Reset input |
| Pin 21 | XOUT — Crystal oscillator output |
| Pin 22 | XIN — Crystal oscillator input |
| Pin 23 | VSS — Digital ground |
| Pin 24 | VCC — Digital supply voltage |
| Pin 25 | P1_7 — GPIO |
| Pin 26 | P1_6 — GPIO |
| Pin 27 | P1_5 — GPIO |
| Pin 28 | P1_4 — GPIO |
| Pin 29 | P1_3 — GPIO |
| Pin 30 | P1_2 — GPIO |
| Pin 31 | P1_1 — GPIO |
| Pin 32 | P1_0 — GPIO |
| Pin 33 | P0_7 — GPIO |
| Pin 34 | P0_6 — GPIO |
| Pin 35 | P0_5 — GPIO |
| Pin 36 | P0_4 — GPIO |
| Pin 37 | P0_3 — GPIO |
| Pin 38 | P0_2 — GPIO |
| Pin 39 | P0_1 — GPIO |
| Pin 40 | P0_0 — GPIO |
| Pin 41 | P6_7 — GPIO |
| Pin 42 | P6_6 — GPIO |
| Pin 43 | P6_5 — GPIO |
| Pin 44 | P6_4 — GPIO |
| Pin 45 | P6_3 — GPIO |
| Pin 46 | P6_2 — GPIO |
| Pin 47 | P6_1 — GPIO |
| Pin 48 | P6_0 — GPIO |
Aplicaciones típicas
R5F21236KFP es adecuado para 6 aplicacións: Home Appliance Control (Washing Machine / Microwave), HVAC Fan and Damper Control, White-Goods Sensor Interface, Small-Motor BLDC/PMSM Control, Automotive Body and Accessory ECU, Industrial Sensor Transmitter.
Home Appliance Control (Washing Machine / Microwave)
The R5F21236KFP's 16-bit R8C core at 16MHz with 32KB flash and 2KB SRAM is well matched to washing machine and microwave-oven controllers, where deterministic firmware governs motor timing, sensor sampling, and user-interface states. The 48-pin LQFP exposes enough GPIO for keypad scanning, LED or LCD matrix drive, and triac-based load switching. The 3V/5V supply tolerance simplifies integration into existing appliance power designs, and the -40C to +125C temperature range supports under-cabinet and laundry-room thermal stress.
Recomendado
HVAC Fan and Damper Control
HVAC indoor-unit controllers require a small, reliable MCU with A/D conversion for temperature sensing and PWM for fan-speed control. The R5F21236KFP's R8C core runs the control loop at 16MHz with deterministic interrupt response, while its 2KB SRAM buffers sensor history. The 48-pin LQFP footprint accommodates multiple PWM outputs, UART links to indoor communication buses, and analog inputs for NTC thermistors. AEC-Q100-aligned temperature grading supports attic and outdoor-unit environments.
Recomendado
White-Goods Sensor Interface
White-goods boards such as dishwasher water-level detectors and refrigerator door-state sensors benefit from the R5F21236KFP's compact 32KB flash, integrated A/D converter, and interrupt-driven GPIO. The R8C core's high instruction efficiency simplifies the implementation of debounced inputs, water-level ramp algorithms, and EEPROM-emulation routines. The Pb-free LQFP-48 package withstands the humid, condensing environments of laundry and refrigeration applications.
Recomendado
Small-Motor BLDC/PMSM Control
Small brushless DC and permanent-magnet synchronous motor controllers in appliances and power tools use the R5F21236KFP to schedule commutation, read Hall sensors, and drive gate-driver signals. The 16MHz R8C core delivers sufficient throughput for sensorless zero-cross detection algorithms in fan applications, while 32KB flash stores calibration tables and fault logs. The 48-pin LQFP provides dedicated PWM outputs and ADC channels needed for current sensing and back-EMF measurement.
Recomendado
Automotive Body and Accessory ECU
Within its automotive-grade Pb-free rating and -40C to +125C range, the R5F21236KFP fits body controllers for seat adjusters, mirror modules, ambient lighting, and HVAC blend-door actuators. The R8C core's deterministic interrupt latency supports LIN slave stacks, while 32KB flash holds vector tables, diagnostics, and calibration. The 48-pin LQFP exposes LIN, PWM, and ADC resources required for sensor-rich body modules.
Recomendado
Industrial Sensor Transmitter
Low-power industrial sensor transmitters for pressure, flow, and level measurement rely on the R5F21236KFP's small footprint, integrated A/D, and 3V/5V supply tolerance to interface with 4-20 mA loops or HART modems. The 32KB flash supports calibration curves and digital filtering, while 2KB SRAM holds moving-average buffers. The LQFP-48 package provides sufficient GPIO for loop-powered displays and isolated serial ports.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para R5F21236KFP — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | R5F21237KFP | R5F21226JFP | R5F21234KFP | R5F21238KFP | PIC18F46K22-I/PT |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Microchip Technology |
| Package | 48-LQFP (7x7) | 48-LQFP (7x7) | 48-LQFP (7x7) | 48-LQFP (7x7) | 48-LQFP (7x7) | 44-TQFP |
| CPU Core | R8C/Tiny 16-bit | R8C/Tiny 16-bit | R8C/Tiny 16-bit | R8C/Tiny 16-bit | R8C/Tiny 16-bit | PIC18 8-bit |
| Maximum Clock | 16 MHz | 16 MHz | 20 MHz | 16 MHz | 16 MHz | 64 MHz |
| Program Flash | 32 KB | 48 KB | 24 KB | 16 KB | 64 KB | 64 KB |
| SRAM | 2 KB | 4 KB | 1.5 KB | 1 KB | 4 KB | 3.8 KB |
| Supply Voltage | 3 V / 5 V | 3 V / 5 V | 3 V / 5 V | 3 V / 5 V | 3 V / 5 V | 1.8 V - 5.5 V |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
Diferenciadores clave
- R8C/23 group with 32KB flash at 16MHz (frente a R5F21226JFP (R8C/22 group))
- Pin-compatible flash upgrade path within R8C/23 (frente a R5F21234KFP (16KB flash variant))
- Mature automotive Pb-free qualification (frente a PIC18F46K22-I/PT (8-bit PIC))
Notas de diseño
Power the R5F21236KFP from a stable 3.3V or 5V rail with a 100nF decoupling capacitor within 5mm of the VCC pin and a 10uF bulk capacitor on the supply. The R8C core draws modest current during flash programming, so the LDO headroom and transient response must support programming-mode peaks. Add a reverse-polarity protection diode if the board is exposed to field-service swaps.
Route the XIN/XOUT traces as short, symmetric differential pair to minimize crystal overdrive and EMI. Keep analog AVSS and digital VSS separated to a single star-ground tie under the package. Avoid routing high-current switching traces (relays, triacs) parallel to analog input lines (AN0-AN7) to preserve A/D accuracy.
Verify that your firmware does not exceed 32KB flash budget; consider the R5F21237KFP (48KB) or R5F21238KFP (64KB) drop-in variants if growth is expected. Watch the MODE pin configuration at reset - incorrect mode entry can lock the device. Confirm that A/D reference voltage on VREF is decoupled with 1uF + 100nF to AVSS for full-scale accuracy across temperature.
Información de cumplimiento
Pb-free (AU PbFree) construction per Mouser listing. AEC-Q100 grade not stated in distributor data - verified data required for automotive qualification claims.
