R5F21264SNFP#V2 - 16KB Flash 16-Bit MCU | Renesas R8C/26
MPN: R5F21264SNFP#V2 ✓ Hoạt độngR5F21264SNFP#V2 Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, RAM, and integrated peripherals. The R8C/26 belongs to the R8C family of 16-bit microcontrollers, a class of devices that sit between 8-bit MCUs (such as the 8051) and 32-bit ARM Cortex-M devices, offering higher code density than 8-bit parts while remaining simpler than full 32-bit architectures. Within the broader taxonomy, this MCU is part of Renesas' legacy 16-bit R8C platform, which has since been superseded for new designs by the RL78/G14 family.
Key features include 20MHz maximum operating frequency, 16KB flash program memory, 1KB on-chip data RAM, a 10-bit A/D converter, multiple timers, watchdog timer, and on-chip debug support. The 32-pin LQFP package provides ample I/O for compact designs while remaining hand-solderable for prototyping. The wide 2.2V to 5.5V operating range allows direct connection to lithium-ion or regulated 5V rails.
The R8C/Tiny CPU core implements a CISC-style instruction set optimized for code density, with most instructions executing in a single cycle and a wide register file that simplifies compiler code generation. On-chip peripherals include timers, a watchdog timer, voltage detector, and serial interfaces (UART, I2C, and SSI). The CMOS process yields low active and standby current, suitable for battery-powered products.
Typical applications include consumer electronics, home appliances, industrial sensor controllers, and low-end automotive subsystems. The combination of small flash footprint, integrated peripherals, and a compact 32-pin LQFP package makes it well-suited to cost-sensitive embedded designs. Designers should consult the R8C/26 hardware manual for register-level configuration details.
When migrating from the R8C/26 family, Renesas recommends the RL78/G14 as the modern replacement, which provides lower power consumption and enhanced peripherals while maintaining code compatibility through translation tools. For legacy support, the R5F21264SNFP#V2 remains active in the Renesas portfolio.
This page synthesizes distributor stock, datasheet references, drop-in R8C/26 family alternatives, and practical design considerations beyond what is available in the bare datasheet.
Bộ thay thế dễ dàng lắp đặt cho R5F21264SNFP#V2 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
R5F21274SNFP#X6
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
R5F21254SNFP#V2
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
R5F21244SNFP#V2
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
R5F21266SNFP#V2
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
R5F21294SNFP
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
R5F21264SNFP#V2 Tỷ lệ tối đa & tính chất điện
| Core Architecture | R8C/Tiny (16-bit CISC) |
| Family | R8C/2x/26 |
| Maximum CPU Frequency | 20 MHz |
| Program Memory (Flash) | 16 KB (16K x 8) |
| Supply Voltage (VDD) | 2.2 V to 5.5 V |
| Nhiệt độ hoạt động | -20 C to +85 C |
| Hộp | 32-LQFP (7x7 mm) |
| Số chân | 32 |
| Kiểu lắp đặt | Surface Mount |
| Watchdog Timer | Yes |
| Voltage Detector (LVD) | Yes |
| On-chip Debug | Yes |
| Trạng thái RoHS | Compliant |
Cấu hình chân R5F21264SNFP#V2
| Chân 1 | P4_5/AN5 — Port 4 bit 5 / Analog input 5 |
| Chân 2 | P4_6/AN6 — Port 4 bit 6 / Analog input 6 |
| Chân 3 | P4_7/AN7 — Port 4 bit 7 / Analog input 7 |
| Chân 4 | VREF — A/D converter reference voltage |
| Chân 5 | AVSS — Analog ground |
| Chân 6 | P3_0 — Port 3 bit 0 |
| Chân 7 | P3_1 — Port 3 bit 1 |
| Chân 8 | P3_2 — Port 3 bit 2 |
| Chân 9 | P3_3 — Port 3 bit 3 |
| Chân 10 | P3_4 — Port 3 bit 4 |
| Chân 11 | P3_5 — Port 3 bit 5 |
| Chân 12 | P3_6 — Port 3 bit 6 |
| Chân 13 | P3_7 — Port 3 bit 7 |
| Chân 14 | VSS — Digital ground |
| Chân 15 | P1_0 — Port 1 bit 0 |
| Chân 16 | P1_1 — Port 1 bit 1 |
| Chân 17 | P1_2 — Port 1 bit 2 |
| Chân 18 | P1_3 — Port 1 bit 3 |
| Chân 19 | P1_4 — Port 1 bit 4 |
| Chân 20 | P1_5 — Port 1 bit 5 |
| Chân 21 | P1_6 — Port 1 bit 6 |
| Chân 22 | P1_7 — Port 1 bit 7 |
| Chân 23 | MODE — Mode select / Reset |
| Chân 24 | XCIN — External clock input / sub-clock |
| Chân 25 | XCOUT — External clock output |
| Chân 26 | RESET — Reset input (active low) |
| Chân 27 | VCC — Digital supply voltage |
| Chân 28 | P4_0/AN0 — Port 4 bit 0 / Analog input 0 |
| Chân 29 | P4_1/AN1 — Port 4 bit 1 / Analog input 1 |
| Chân 30 | P4_2/AN2 — Port 4 bit 2 / Analog input 2 |
| Chân 31 | P4_3/AN3 — Port 4 bit 3 / Analog input 3 |
| Chân 32 | P4_4/AN4 — Port 4 bit 4 / Analog input 4 |
Ứng dụng tiêu biểu
R5F21264SNFP#V2 phù hợp cho 7 Áp dụngs: Home Appliance Control Board, Industrial Sensor Interface Module, Consumer Remote Control / IR Transmitter, Low-End Automotive Body Controller, Battery-Operated IoT Sensor Node, LED Lighting Controller, Toy and Hobby Electronics.
Home Appliance Control Board
The R5F21264SNFP#V2 fits home appliance control boards thanks to its 16KB flash (sufficient for washing-machine or microwave firmware), 2.2V-5.5V supply range, and 32-LQFP compact footprint. The integrated 10-bit A/D converter reads temperature and water-level sensors directly, while the timers drive triac-based heater control. Renesas application notes recommend the R8C/26 for sub-100 RMB BOM consumer appliances where the RL78/G14 is over-spec. A typical circuit uses the on-chip high-speed oscillator (no external crystal) to further reduce BOM cost.
Được đề xuất
Industrial Sensor Interface Module
The R5F21264SNFP#V2 serves well in 4-20mA or 0-10V sensor-interface modules where the 10-bit A/D provides adequate resolution for most process-control signals. The 20MHz CPU clock handles Modbus RTU over UART at 115200 baud with ample margin for protocol parsing. The wide 2.2V-5.5V supply simplifies loop-powered designs where the MCU shares the 24V loop supply via a small switching regulator. The watchdog timer and voltage detector protect against brown-out conditions common in industrial wiring.
Được đề xuất
Consumer Remote Control / IR Transmitter
The R5F21264SNFP#V2 is well matched to consumer IR remote controls due to its small flash footprint, low active current, and integrated timers for carrier generation. The R8C/Tiny core runs NEC or RC5 IR protocols at 38kHz carrier frequency with timer interrupts, leaving the main loop free for button scanning and battery monitoring. The 32-LQFP package accommodates hand-held enclosures where board real estate is constrained. Low-power standby mode extends coin-cell battery life to multiple years.
Được đề xuất
Low-End Automotive Body Controller
The R5F21264SNFP#V2 handles body-control tasks such as seat controller, mirror adjuster, or interior lighting where 16KB of flash accommodates the LIN-stack and diagnostics firmware. While the standard part is rated -20C to +85C, automotive AEC-Q100 qualified R8C/2x variants exist for harsher environments. The 32-LQFP package tolerates the higher vibration and thermal-cycling stresses of cabin-mounted ECUs. A typical design pairs the MCU with a LIN transceiver for body-network connectivity.
Được đề xuất
Battery-Operated IoT Sensor Node
The R5F21264SNFP#V2 suits IoT sensor nodes that wake periodically to read a sensor, transmit via UART-connected radio, and return to deep sleep. The R8C/26's low standby current combined with the 16KB flash for application + stack code fits sub-1mA average-power budgets on 2xAA cells. The integrated 10-bit A/D samples battery voltage for accurate state-of-charge reporting. Designers can choose the internal low-speed oscillator for sleep-mode timing, eliminating external RTC chips.
Được đề xuất
LED Lighting Controller
The R5F21264SNFP#V2 controls constant-current LED drivers in architectural and residential lighting fixtures where DMX or DALI protocol parsing fits comfortably within the 16KB flash budget. The 20MHz CPU clock handles 250kbps DALI refresh rates with hardware-timer-driven bit timing. The 2.2V-5.5V supply range works with both 3.3V logic-level LED drivers and 5V analog dimming interfaces. The 32-LQFP package supports hand-soldered prototype fixtures used by lighting designers.
Được đề xuất
Toy and Hobby Electronics
The R5F21264SNFP#V2 drives consumer toys and hobby robotics where its 16KB flash accommodates multi-mode behaviors (line-follow, sumo, anti-collision) and the integrated timers generate PWM for motor speed control. The R8C/Tiny core's CISC instruction set delivers high code density, fitting rich behaviors into the 16KB budget. The 32-LQFP package is hand-solderable for hobbyists, and the 2.2V-5.5V supply works with 2xAA or 1S Li-ion battery packs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho R5F21264SNFP#V2 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | R5F21274SNFP#X6 | R5F21254SNFP#V2 | R5F21244SNFP#V2 | R5F21266SNFP#V2 |
|---|---|---|---|---|---|
| Package | 32-LQFP (7x7 mm) | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Flash Memory | 16 KB | 24 KB (+50%) | 8 KB (-50%) | 12 KB (-25%) | 20 KB (+25%) |
| CPU Core | R8C/Tiny 16-bit | R8C/Tiny 16-bit | R8C/Tiny 16-bit | R8C/Tiny 16-bit | R8C/Tiny 16-bit |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage | 2.2 V to 5.5 V | 2.2 V to 5.5 V | 2.2 V to 5.5 V | 2.2 V to 5.5 V | 2.2 V to 5.5 V |
| Operating Temperature | -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 |
Bảo phân biệt quan trọng
- R8C/Tiny 16-bit core with high code density (vsPIC16F (8-bit) alternatives)
- Wide 2.2V-5.5V supply supports battery and 5V rails (vsR5F21254SNFP#V2 (lower flash variant))
- Drop-in scalability within R8C/2x family (vsPIC18F25K22 (28-pin SPDIP))
Ghi chú thiết kế
Place a 0.1 uF decoupling capacitor as close as possible to each VCC pin (pin 27) and a 10 uF bulk capacitor near the VCC pin to suppress supply transients. The R8C/26 operates from 2.2V to 5.5V; ensure the regulator can supply the peak active current (typ. 10 mA at 20 MHz per the datasheet) plus any peripheral load. For battery-powered designs, the voltage detector (LVD) module should be enabled with a threshold above the brown-out level to allow clean shutdown.
The 32-LQFP package has a 0.8 mm lead pitch; use 0.4 mm-wide traces with 0.2 mm clearance to escape the inner leads. Place at least one full ground plane beneath the device and stitch the perimeter with vias to reduce EMI. Keep the analog (AN) traces short and away from switching signals to preserve 10-bit A/D accuracy. The exposed thermal pad on this LQFP is not present; therefore no central pad connection is required.
Do not exceed 5.5V on any pin, including during hot-plug events - the absolute maximum ratings per the Renesas datasheet can cause latch-up above 6V. Configure unused I/O pins as outputs (low) or inputs with pull-ups to minimize standby current. The MODE pin must be held low during normal operation; a floating MODE pin may inadvertently enter debug or boot modes. Verify crystal load capacitor values against the crystal's CL specification, not the MCU's internal load capacitance alone.
At 20 MHz active mode with 3.3 V supply, the R5F21264SNFP#V2 dissipates approximately 33 mW (estimated from V x I_active with I_active = 10 mA). The 32-LQFP package has typical theta_JA of 70-80 C/W on a 4-layer board, yielding a junction temperature rise of 2-3 C above ambient - well within the -20 C to +85 C operating range. No heatsink is required for typical applications. In enclosed housings without airflow, verify junction temperature empirically under worst-case load.
Thông tin tuân thủ
RoHS and REACH compliant per Renesas product page. AEC-Q100 qualification status unknown - check the Q-suffix variants for automotive. Standard grade is rated -20C to +85C (commercial), not industrial or automotive.
