My Inquiry
My Account
Renesas R5F10278GNA#65
- Part No.:
- R5F10278GNA#65
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
R5F10278GNA#65.pdf
- Description:
- 16-BIT GENERAL MCU RL78/G12 8K 2
- Quantity:
- Payment:
- Shipping:
Inventory:1,343
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
R5F10278GNA#65 from Renesas Electronics is a 24-pin HWQFN-packaged RL78/G12 16-bit microcontroller designed for industrial embedded control at extended temperature (–40°C to +105°C). It integrates 8 KB code flash, 2 KB data flash, 768 B RAM, 10-bit A/D converter (11 channels), dual UART/CSI/I²C interfaces, 2-channel DMA, and ultra-low-power operation (63 μA/MHz) with HALT/STOP/SNOOZE modes - deployed in smart sensors and programmable logic controllers.
For engineers reviewing the R5F10278GNA#65 datasheet, R5F10278GNA#65 pinout, R5F10278GNA#65 application, or R5F10278GNA#65 equivalent, this page delivers verified technical context, package-validated pin functions, real-world use-value mapping, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The R5F10278GNA#65 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting 1 MB address space and minimum instruction execution time of 0.04167 µs at 24 MHz using the high-accuracy (±1.0 %) on-chip oscillator. It operates across 1.8–5.5 V supply and supports HS/LS clock modes with external crystal (1–20 MHz) or internal oscillator (1–24 MHz).
It includes safety-enhancing peripherals exclusive to R5F102-series: CRC calculation unit, RAM guard, SFR guard, and background data flash rewriting (BGO) with 1,000,000 TYP rewrite cycles. All 24 pins are validated for I/O roles including analog inputs (ANI0–ANI3, ANI16–ANI22), key return (KR0–KR9), timer I/O (TI00–TI03, TO00–TO03), and dual serial interfaces (CSI00/CSI01, IIC00/IIC01, UART0).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC with 3-stage pipeline, 1 MB address space |
| Operating Voltage | 1.8 V to 5.5 V - enables direct interface with 1.8/2.5/3.3/5 V logic and battery-powered systems |
| Flash Memory | 8 KB code flash + 2 KB data flash - supports self-programming and secure block erase prohibition |
| RAM Size | 768 B - sufficient for real-time control stacks and small buffers in sensor fusion or motor commutation |
| A/D Converter | 10-bit resolution, 11 input channels with internal 1.45 V reference and temperature sensor - eliminates external reference ICs |
| Serial Interfaces | 2 × CSI (SPI-like), 2 × I²C, 1 × UART - enables concurrent communication with multiple sensors and host controllers |
| Power Modes | HALT, STOP, SNOOZE - achieves 63 μA/MHz active current and sub-μA standby for energy-constrained applications |
Pinout & Package
Package: HWQFN-24 (4 mm × 4 mm, 0.5 mm pitch) with exposed die pad connected to VSS per datasheet recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00–P03 | Port 0 I/O (KR6–KR9) | Key return inputs with internal pull-up; usable as general-purpose CMOS I/O or N-ch open-drain (VDD-tolerant) |
| P10–P14 | Port 1 I/O (ANI16–ANI20, SCK00/SCL00, SI00/RxD0, SO00/TxD0, TI00/TO00, TI01/TO01) | Multi-function pins supporting UART0, CSI00, timer I/O, and analog inputs - configurable via PIOR register |
| P20–P23 | Port 2 I/O (ANI0–ANI3, AVREFP/AVREFM) | Analog front-end with dedicated reference voltage pins; P20/P21 support precision A/D conversion |
| P40–P42 | Port 4 I/O (TOOL0, ANI21/ANI22, SCK01/SCL01, SO01/SDA01, TI02/TO02, TI03/TO03) | Second serial interface (CSI01/IIC01) and additional timer I/O - extends peripheral concurrency |
| P60/P61 | Port 6 I/O (SCLA0/SDAA0) | Dedicated I²C bus interface with 6 V-tolerant N-ch open-drain outputs - compatible with mixed-voltage I²C slaves |
| P121/P122 | Crystal oscillator inputs (X1/X2/EXCLK) | Supports external crystal (1–20 MHz) or external clock source for precise timing-critical control loops |
| P125 | Reset input (SI01/RESET) | Active-low reset with internal pull-up; accepts standard 3.3 V or 5 V reset signals |
| VDD/VSS | Power supply and ground | Single-supply operation; exposed die pad must be soldered to VSS for thermal and EMI performance |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power consumption | 63 μA/MHz active current enables >10-year battery life in wireless sensor nodes |
| Data flash with BGO | 2 KB data flash supports background rewriting during program execution - no interruption to real-time control tasks |
| Hardware safety features | CRC unit, RAM guard, and SFR guard provide runtime memory integrity checking for IEC 61508-compliant designs |
| Multi-protocol serial connectivity | Dual CSI + dual I²C + UART allows simultaneous interfacing with SPI sensors, I²C EEPROMs, and host MCUs without software bit-banging |
| Configurable analog front-end | 11-channel 10-bit A/D with internal 1.45 V reference and temperature sensor reduces BOM count by eliminating external references and thermal monitoring ICs |
Applications
| Industrial Temperature Sensor Node | Programmable Logic Controller (PLC) I/O Module |
|---|---|
Use Scenario: Compact, battery-operated environmental monitor deployed in HVAC ducts or factory floors operating from –40°C to +105°C. IC Role / Device Role / Timing Role: Primary controller executing sensor polling, calibration, local decision logic, and LoRaWAN packet assembly with precise 12-bit interval timer triggering. Use Value: Integrated 10-bit A/D (11 ch), temperature sensor, and ultra-low-power SNOOZE mode enable 5+ year battery life without sacrificing measurement accuracy or sampling rate. |
Use Scenario: DIN-rail mounted digital input/output expansion module for legacy PLC systems requiring isolated field-side communication. IC Role / Device Role / Timing Role: Local intelligence hub managing opto-isolated inputs, driving solid-state relays, and communicating via RS-485 (UART0) and I²C (to local EEPROM/config storage). Use Value: Dual UART + dual I²C + 24 GPIO pins allow concurrent fieldbus communication, nonvolatile configuration storage, and real-time I/O state management without external glue logic. |
| Smart Appliance Motor Control | Energy Metering Subsystem |
Use Scenario: Brushless DC motor driver in commercial refrigeration compressors requiring closed-loop speed regulation and fault diagnostics. IC Role / Device Role / Timing Role: Real-time motor commutation controller using TAU0 timer outputs (TO00–TO03) for PWM generation and ADC sampling for current sensing and thermal feedback. Use Value: 8 KB flash stores complex FOC algorithms; 768 B RAM accommodates PID buffers; 63 μA/MHz minimizes heat generation in sealed enclosures. |
Use Scenario: Secondary metering unit in smart electricity meters performing auxiliary measurements (voltage sag/swell, harmonic analysis, tamper detection). IC Role / Device Role / Timing Role: Co-processor handling waveform capture via 10-bit A/D (11 ch), CRC-based data integrity checks, and secure firmware updates via data flash BGO. Use Value: Hardware CRC engine and 2 KB data flash with 1M-cycle endurance ensure reliable, long-term firmware update capability and tamper-resilient logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F1027AGNA#65 | Same package and pinout; 16 KB code flash, 2 KB data flash, 2 KB RAM - higher memory capacity | Required for larger firmware images (e.g., Modbus TCP stack + web server) or extended data logging buffers | Select when >8 KB flash or >768 B RAM is needed; identical peripheral set and temperature rating |
| R5F10378GNA#65 | No data flash; no DMA; no CRC/RAM/SFR guard; ±5.0% oscillator accuracy; only 1 CSI and 1 I²C channel | Suitable for cost-sensitive, non-safety-critical applications where background data logging or hardware safety is not required | Choose for lower-cost consumer-grade control where extended temperature range remains critical but safety/performance margins are relaxed |
Compared with R5F10278GNA#65, R5F1027AGNA#65 offers scalable memory headroom within identical industrial reliability and feature set, while R5F10378GNA#65 trades safety peripherals and data flash for reduced BOM cost - making it viable only where certification requirements permit functional simplification.
Availability
R5F10278GNA#65 is available at Aetrix Electronics and suitable for industrial automation, smart sensor deployment, and energy metering applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for R5F10278GNA#65 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with over 40 years of MCU innovation.
The RL78/G12 family was engineered specifically for ultra-low-power, cost-sensitive industrial control applications - balancing rich peripheral integration, extended temperature operation (–40°C to +105°C), and robust safety features like CRC and memory guards.
FAQ
What is the maximum operating frequency and accuracy of the on-chip oscillator in R5F10278GNA#65?
The R5F10278GNA#65 features a high-speed on-chip oscillator selectable from 1 MHz to 24 MHz, with ±1.0 % accuracy across –20°C to +85°C and ±2.0 % at –40°C to +105°C. This enables precise timing for UART baud rates and PWM generation without external crystals in many applications, reducing system cost and board area.
Does R5F10278GNA#65 support background data flash rewriting while executing application code?
Yes, R5F10278GNA#65 supports Background Operation (BGO) for its 2 KB data flash memory. This allows the CPU to execute instructions from program memory while simultaneously rewriting data flash - essential for logging sensor data or updating configuration parameters without interrupting real-time control tasks.
How many analog input channels does R5F10278GNA#65 provide, and what reference voltage options are available?
R5F10278GNA#65 provides 11 analog input channels (ANI0–ANI3, ANI16–ANI22) with 10-bit resolution. It includes an internal 1.45 V reference voltage and supports external reference via AVREFP/AVREFM pins - enabling accurate measurements across varying supply voltages without external reference ICs.
What safety features are integrated into R5F10278GNA#65 for industrial applications?
R5F10278GNA#65 integrates hardware CRC calculation, RAM guard, and SFR guard - all part of Renesas' functional safety support for IEC 61508 SIL2-ready designs. These features detect memory corruption and unauthorized register writes, enhancing system reliability in mission-critical industrial environments.
Is R5F10278GNA#65 pin-compatible with other RL78/G12 24-pin variants such as R5F10277GNA#65 or R5F10279GNA#65?
Yes, R5F10278GNA#65 shares identical HWQFN-24 pinout and package dimensions with all R5F1027xGNA#65 variants. Differences are limited to memory configuration (2 KB vs. 4 KB vs. 8 KB code flash) and do not affect PCB layout - enabling seamless firmware and hardware scalability across the G12 24-pin industrial series.
R5F10278GNA#65 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 24-WFQFN Exposed Pad
- Series:
- RL78/G12
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- RL78
- Core Size:
- 16-Bit
- Speed:
- 24MHz
- Connectivity:
- CSI, I2C, UART/USART
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 18
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 11x8/10b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F10278GNA#65 FAQ
1.How can I place an order for R5F10278GNA#65 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F10278GNA#65 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for R5F10278GNA#65 reliable?
The price and inventory of R5F10278GNA#65 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F10278GNA#65 is usually 5 days.
3.What payment methods are accepted for R5F10278GNA#65?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F10278GNA#65 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F10278GNA#65?
R5F10278GNA#65 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F10278GNA#65 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for R5F10278GNA#65?
For technical support, including R5F10278GNA#65 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F10278GNA#65 requirements.
6.How does Aetrix verify that R5F10278GNA#65 is sourced from the original manufacturer or authorized distributors?
All R5F10278GNA#65 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that R5F10278GNA#65 meets industry standards.
7.What is the process for return or replacement of R5F10278GNA#65?
All R5F10278GNA#65 units undergo pre-shipment inspection (PSI). If there is an issue with R5F10278GNA#65, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The R5F10278GNA#65 part is unused and in its original packaging.
Return procedure for R5F10278GNA#65:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F10278GNA#65 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
