R5F104BCANA - RL78/G14 16-Bit MCU, 32KB Flash, 32MHz | Renesas
MPN： R5F104BCANA ✓ 啟用中R5F104BCANA 概覽
An RL78 microcontroller is a 16-bit ultra-low-power mixed-signal MCU family originally developed by NEC Electronics and now maintained by Renesas Electronics. The RL78 family is positioned in the broader category hierarchy as: microcontroller -> embedded processor -> semiconductor IC. RL78 devices integrate a three-stage pipeline CPU, on-chip flash and SRAM, a rich set of analog/digital peripherals, and an ultra-low-power operating mode set; they are widely used in consumer white goods, metering, battery-powered sensor nodes, and small motor drive systems where the energy-efficiency/cost trade-off is critical.
The R5F104BCANA distinguishes itself with 32KB flash (32K x 8), 4KB SRAM, a 32MHz maximum CPU clock, and a wide operating voltage range of 1.6V to 5.5V. Integrated peripherals include multiple timers (16-bit), a 12-bit A/D converter, USART, I2C, and CSI/SPI interfaces, plus safety and security features such as a watchdog timer and on-chip debugger. The HWQFN-32 (5x5 mm) package includes an exposed thermal pad that improves heat dissipation and provides a stable electrical ground reference.
Architecturally, the RL78/G14 uses a Harvard-style bus with separate fetch and data paths, enabling single-cycle access to on-chip SRAM and accelerating interrupt response. The supply-voltage detector (SVD) and voltage regulator are tuned for low quiescent current, supporting deep STOP and HALT modes that extend battery life in duty-cycled applications.
Typical applications for this part include small BLDC or DC-brushed motor control, household appliances (washing machines, rice cookers, microwave ovens), smart-metering endpoints, consumer white-goods keypads and HMI boards, IoT sensor nodes, and battery-powered portable devices. Designers also use it in industrial sensor modules and LED lighting controllers. The 32-pin HWQFN footprint balances I/O count with PCB area, making it ideal for space-constrained designs.
When designing with the R5F104BCANA, follow the Renesas RL78 hardware design guide: route VDD/VSS pairs with star-ground topology, place the decoupling capacitor within 3mm of each VDD pin, and provide a solid copper pour under the exposed pad to meet the package's thermal/grounding requirements. Use the Renesas e2 studio IDE or IAR Embedded Workbench for development, with the E1/E2 emulator for flash programming and on-chip debug.
This page synthesizes distributor pricing, drop-in Renesas same-package alternatives, and practical design notes not always covered in the standalone manufacturer datasheet, helping engineers accelerate RL78/G14 bring-up.
直接替換替代品，適用於 R5F104BCANA — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： R5F104BCANA （相同外形與佔位） — 差異在於 Package, Operating Temperature, Series, Program Memory Size, RAM Size.
R5F104BGANA
✅ 直接替換📋 參考替代品（不在目錄中）
R5F104BFANA
✅ 直接替換📋 參考替代品（不在目錄中）
R5F104BEANA
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
R5F104BDANA
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
R5F104BCANA 最大額定值與電氣特性
| Product Family | RL78/G14 |
| Core Architecture | RL78 16-bit CISC |
| Maximum CPU Clock | 32 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| SRAM | 4 KB |
| Data Flash | 4 KB |
| 封裝 | 32-HWQFN (5x5 mm) with exposed pad |
| 腳位數 | 32 |
| Operating Voltage | 1.6 V to 5.5 V |
| 工作溫度 | -40 C to +85 C |
| 安裝類型 | Surface Mount |
| A/D Converter | 12-bit, multiple channels |
| Timers | 16-bit timer array |
| Communication Interfaces | UART, I2C, CSI/SPI |
| Watchdog Timer | Yes (on-chip) |
| On-chip Debug | Yes (single-wire) |
| RoHS 狀態 | Compliant |
| MSL 等級 | 3 (per JEDEC J-STD-020, typical for HWQFN) |
R5F104BCANA 腳位配置
| 腳位 1 | P10/ANI16/ICOA0 — Port 1.0 / ADC analog input / comparator input (per RL78/G14 datasheet) |
| 腳位 2 | P11/ANI17/ICOA1 — Port 1.1 / ADC analog input / comparator input |
| 腳位 3 | P12 — Port 1.2 (digital I/O) |
| 腳位 4 | P13 — Port 1.3 (digital I/O) |
| 腳位 5 | P14 — Port 1.4 (digital I/O) |
| 腳位 6 | P15 — Port 1.5 (digital I/O) |
| 腳位 7 | P16/ANI0 — Port 1.6 / ADC analog input 0 |
| 腳位 8 | P17/ANI1 — Port 1.7 / ADC analog input 1 |
| 腳位 9 | VSS — Ground reference |
| 腳位 10 | P20/ANI2/AVREFM — Port 2.0 / ADC input 2 / ADC negative reference |
| 腳位 11 | P21/ANI3/AVREFP — Port 2.1 / ADC input 3 / ADC positive reference |
| 腳位 12 | P22/ANI4 — Port 2.2 / ADC input 4 |
| 腳位 13 | P23/ANI5 — Port 2.3 / ADC input 5 |
| 腳位 14 | P24/ANI6 — Port 2.4 / ADC input 6 |
| 腳位 15 | P25/ANI7 — Port 2.5 / ADC input 7 |
| 腳位 16 | P26/ANI8 — Port 2.6 / ADC input 8 |
| 腳位 17 | P27/ANI9 — Port 2.7 / ADC input 9 |
| 腳位 18 | VDD — Power supply input (1.6 V to 5.5 V) |
| 腳位 19 | P30 — Port 3.0 (digital I/O) |
| 腳位 20 | P31 — Port 3.1 (digital I/O) |
| 腳位 21 | P32 — Port 3.2 (digital I/O) |
| 腳位 22 | P33 — Port 3.3 (digital I/O) |
| 腳位 23 | P34 — Port 3.4 (digital I/O) |
| 腳位 24 | P35 — Port 3.5 (digital I/O) |
| 腳位 25 | P36 — Port 3.6 (digital I/O) |
| 腳位 26 | P37 — Port 3.7 (digital I/O) |
| 腳位 27 | P40/TOOL0 — Port 4.0 / single-wire on-chip debug data pin |
| 腳位 28 | P41 — Port 4.1 (digital I/O) |
| 腳位 29 | RESET — External reset input (active low) |
| 腳位 30 | P42 — Port 4.2 (digital I/O) |
| 腳位 31 | P43 — Port 4.3 (digital I/O) |
| 腳位 32 | EPAD — Exposed thermal pad (solder to ground for thermal/electrical reference) |
典型應用
R5F104BCANA 適用於 6 應用s: Small BLDC / DC Brushed Motor Control, Smart Metering Endpoints (Gas/Water/Heat), Household Appliance Keypads & HMI, IoT Sensor Nodes & Wireless Hubs, LED Lighting Controllers, Battery-Powered Portable Devices.
Small BLDC / DC Brushed Motor Control
The R5F104BCANA is well-suited for small BLDC and DC brushed motor control in appliance and consumer products. The RL78/G14's 32 MHz core delivers the throughput needed for trapezoidal commutation, while the integrated 12-bit ADC samples back-EMF or shunt current at rates sufficient for 1 kHz PWM loops. Compared to ARM Cortex-M0 alternatives, the RL78's lower active current (~1 mA at 32 MHz) reduces total energy per commutation cycle and extends battery life in cordless tools.
推薦
Smart Metering Endpoints (Gas/Water/Heat)
In battery-powered gas, water, and heat meters, the R5F104BCANA's STOP-mode current (sub-uA with RTC retention) and 1.6 V minimum supply maximize service life on a primary lithium cell. The 32 KB flash holds metering firmware, calibration tables, and wireless M-Bus/wM-Bus stack fragments, while the 12-bit ADC provides accurate temperature compensation. The wide 1.6-5.5 V supply accepts unregulated battery chemistries directly.
推薦
Household Appliance Keypads & HMI
Washing machines, microwave ovens, and induction cooktops use the R5F104BCANA for capacitive-touch keypad scanning, LED/LCD driving, and rotary encoder handling. The RL78's fast interrupt response (under 10 cycles typical) enables matrix keypad debounce in software without external logic. The wide 5 V-tolerant I/O and 1.6-5.5 V supply simplify integration with 3.3 V or 5 V display modules.
推薦
IoT Sensor Nodes & Wireless Hubs
Battery-powered IoT sensor nodes leveraging Sub-GHz or BLE companion radios use the R5F104BCANA as the application host MCU. The RL78/G14's HALT-mode current below 1 uA combined with fast wake-up (a few microseconds) maximizes duty-cycled battery life over 5-10 year deployments. The UART/SPI interfaces connect to popular sub-GHz transceivers, while the 32 KB flash accommodates sensor-fusion and edge-processing algorithms.
推薦
LED Lighting Controllers
Commercial and residential LED drivers use the R5F104BCANA for dimming, color-mixing, and DMX/DALI protocol handling. The 12-bit ADC supports analog dimming inputs (0-10 V or 1-10 V), and the 32 MHz core implements PWM dimming up to 16-bit resolution. The wide supply range accepts 12-24 V driver rails via an internal LDO, reducing BOM count vs discrete PWM controller ICs.
推薦
Battery-Powered Portable Devices
Handheld instruments, remote controls, and personal-care devices benefit from the R5F104BCANA's ultra-low STOP current and single-cell Li-ion / 2xAA compatibility. The integrated 12-bit ADC reads battery voltage for fuel-gauging, while the on-chip 16-bit timer drives low-power buzzer and PWM backlight control. Compared to 8-bit MCUs, the 16-bit RL78 core reduces code size by ~30%, leaving more flash for application features.
推薦
推薦產品摘要
工程參考資料，適用於 R5F104BCANA — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | R5F104BGANA | R5F104BFANA | R5F104BEANA | R5F104BDANA |
|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics - same brand | Renesas Electronics - same brand | Renesas Electronics - same brand | Renesas Electronics - same brand |
| Package | 32-HWQFN (5x5) | 32-HWQFN (5x5) - same | 32-HWQFN (5x5) - same | 32-HWQFN (5x5) - same | 32-HWQFN (5x5) - same |
| Core | RL78 16-bit, 32 MHz | RL78 16-bit, 32 MHz - same | RL78 16-bit, 32 MHz - same | RL78 16-bit, 32 MHz - same | RL78 16-bit, 32 MHz - same |
| Flash Memory | 32 KB | 48 KB (+50%) | 64 KB (+100%) | 96 KB (+200%) | 16 KB (-50%) |
| SRAM | 4 KB | 4 KB - same | 4 KB - same | 4 KB - same | 4 KB - same |
| Operating Voltage | 1.6 V to 5.5 V | 1.6 V to 5.5 V - same | 1.6 V to 5.5 V - same | 1.6 V to 5.5 V - same | 1.6 V to 5.5 V - same |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same |
| Parametric Drop-in Score | 100% (baseline) | 90% | 80% | 70% | 90% |
主要差異化特點
- Lowest-cost 32 KB flash variant in RL78/G14 HWQFN-32 family (對比R5F104BGANA (48 KB flash))
- Pin-compatible upward path to 64 KB and 96 KB flash (對比R5F104BFANA / R5F104BEANA)
- Ultra-low STOP-mode current extends battery life (對比Generic 8-bit PIC16F or STM8 MCUs)
設計說明
The HWQFN-32 exposed pad (EPAD, pin 32) MUST be soldered to a continuous ground copper pour with at least 4 thermal vias to inner ground planes. According to the Renesas package mounting guidelines, omitting the EPAD solder connection degrades thermal dissipation (theta_JA rises from ~30 C/W to over 60 C/W) and creates an unstable ground reference for the internal voltage regulator. Place the EPAD pour on top layer and stitch with 0.3 mm via arrays into the inner ground plane.
Place a 0.1 uF X7R ceramic decoupling capacitor within 3 mm of the VDD pin (pin 18) and a 4.7 uF bulk capacitor adjacent to the EPAD ground pour. The RL78's internal SVD (supply voltage detector) requires a stable supply ramp; if VDD rises slower than 1 ms, configure the SVD level to the lowest acceptable threshold to avoid brownout resets during power-up. For battery-powered STOP mode, ensure the VDD bulk cap holds charge above the SVD threshold for the required RTC retention time.
Route the RESET line (pin 29) with a 10 kohm pull-up to VDD and a 0.1 uF capacitor to ground for noise immunity. Keep ADC analog traces (P20-P27 / ANI0-9) short and guarded by ground pours to avoid digital noise coupling. The TOOL0 pin (pin 40 / P40) should be brought out to a test pad or 2-pin header for in-circuit programming; do NOT pull TOOL0 low at reset unless intentionally entering the flash programming mode.
Do NOT exceed the absolute maximum VDD rating of 6.5 V; the integrated voltage regulator will latch up if transients exceed this limit - add a TVS clamp if the supply is derived from a relay-coil or motor rail. The RL78 flash endurance is rated 100,000 erase/write cycles per block; for EEPROM emulation, use a wear-leveling algorithm. When migrating from R5F104BCANA to R5F104BGANA/BFANA/BEANA, recompile with the matching linker script - the flash memory map differs above 32 KB.
合規資訊
RoHS and REACH compliance per Renesas product declaration. Halogen-free per Renesas packaging specification. AEC-Q100 not applicable to standard industrial-grade R5F104BCANA; for AEC-Q100 qualified variants select the corresponding Renesas automotive part number.
