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Renesas R5F10277ANA#U5
- Part No.:
- R5F10277ANA#U5
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
R5F10277ANA#U5.pdf
- Description:
- IC MCU 16BIT 4KB FLASH 24HWQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
R5F10277ANA#U5 from Renesas Electronics is a 24-pin HWQFN-packaged RL78/G12 16-bit microcontroller designed for ultra-low-power embedded control. It integrates 4 KB code flash, 2 KB data flash, 256 B RAM, 10-bit A/D converter (11 channels), and operates from 1.8 V to 5.5 V at –40°C to +85°C - enabling battery-powered sensor nodes and smart home peripherals.
For engineers reviewing the R5F10277ANA#U5 datasheet, R5F10277ANA#U5 pinout, R5F10277ANA#U5 application, or R5F10277ANA#U5 equivalent, key selection criteria include its 2-channel DMA support, on-chip CRC and RAM/SFR guard safety features, 24 MHz high-accuracy ±1.0% on-chip oscillator, and dual simplified SPI/I²C interfaces - all within a 4 × 4 mm, 0.5-mm-pitch package.
Technical Context
The R5F10277ANA#U5 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution as fast as 0.04167 µs (@24 MHz) and addressing up to 1 MB space. Its power management includes HALT, STOP, and SNOOZE modes, achieving 63 μA/MHz active current consumption.
It embeds a dedicated low-speed on-chip oscillator (15 kHz) for watchdog timer operation independent of main clock, and supports background operation (BGO) for data flash rewriting while executing code from program memory - critical for firmware-over-the-air updates in field-deployed devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC with 3-stage pipeline, 1 MB address space |
| Flash Memory | 4 KB code flash + 2 KB data flash with self-programming and flash shield window |
| RAM | 256 B on-chip RAM, sufficient for real-time control stacks without external SRAM |
| A/D Converter | 10-bit resolution, 11 input channels, internal 1.45 V reference and temperature sensor |
| Operating Voltage | 1.8 V to 5.5 V single supply - enables direct interface with 1.8/2.5/3.3/5 V peripherals |
| Temperature Range | –40°C to +85°C (A-grade), suitable for consumer and industrial ambient environments |
| Power Consumption | 63 μA/MHz active current; STOP mode draws 0.52 μA typical |
Pinout & Package
Package: 24-pin HWQFN (4 × 4 mm, 0.5-mm pitch), exposed die pad recommended to be connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P125/KR1/SI01/RESET | Multi-function input | Primary reset input; also serves as serial data input (CSI01) when not in reset mode |
| P121/KR3/X1 | Crystal input | Connects to crystal/ceramic resonator for precise main system clock (1–20 MHz) |
| P122/KR2/X2/EXCLK | Crystal output / external clock input | Completes crystal oscillator circuit or accepts external clock source up to 20 MHz |
| P20/ANI0/AVREFP | Analog input / reference voltage | Positive analog reference input and first A/D channel; supports differential measurement with AVREFM |
| P21/ANI1/AVREFM | Analog input / reference voltage | Negative analog reference input and second A/D channel; enables true differential ADC operation |
| P40/KR0/TOOL0 | Key return / debug I/O | Supports key scan matrix and on-chip debug communication via TOOL interface |
| P60/KR4/SCLA0/(TxD0) | I²C clock / UART output | Configurable as I²C clock line or UART transmit output - enables shared pin resource optimization |
| P61/KR5/SDAA0/(RxD0) | I²C data / UART input | Configurable as I²C data line or UART receive input - supports dual-protocol peripheral interfacing |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power operation | 63 μA/MHz active current and 0.52 μA STOP mode enable multi-year battery life in IoT endpoints |
| Data flash with BGO | 2 KB data flash supports background rewriting during program execution - essential for robust firmware update handling |
| Hardware safety functions | CRC calculation unit, RAM guard, and SFR guard detect memory corruption and prevent unintended register writes |
| Dual simplified serial interfaces | 2 CSI (SPI-like) + 2 simplified I²C channels allow concurrent connection to multiple sensors and displays |
| On-chip oscillator accuracy | ±1.0% over –20°C to +85°C eliminates need for external crystal in cost-sensitive applications |
| Flexible I/O configuration | 22 total I/O pins including N-ch open-drain (6 V tolerant) and TTL-input buffers - simplifies level-shifting design |
Applications
| Smart Home Sensor Node | Industrial Control Panel |
|---|---|
Use Scenario: Battery-powered temperature/humidity/light sensor with BLE gateway interface. IC Role / Device Role / Timing Role: Main controller managing A/D sampling, sensor fusion, low-power scheduling, and UART-to-BLE bridge timing. Use Value: 63 μA/MHz active current and STOP-mode 0.52 μA extend coin-cell battery life beyond 5 years; 2 KB data flash stores calibration coefficients and OTA update staging area. |
Use Scenario: Front-panel HMI for PLC or motor drive with pushbuttons, LED indicators, and RS-485 communication. IC Role / Device Role / Timing Role: Dedicated UI controller handling key scan, LED PWM dimming, buzzer tone generation, and isolated UART timing. Use Value: On-chip buzzer/clock output (2.44 kHz–10 MHz) drives piezo elements directly; KR0–KR9 key return inputs reduce external debounce components. |
| White Goods Appliance MCU | Medical Diagnostic Handheld |
Use Scenario: Compressor/fan control module in refrigerator or air conditioner with fault monitoring. IC Role / Device Role / Timing Role: Real-time motor timing controller using TAU0 4-channel PWM outputs and watchdog supervision. Use Value: Hardware CRC and RAM/SFR guard detect memory faults before safety-critical actuation; 10-bit A/D monitors thermistor and current-sense signals. |
Use Scenario: Portable blood glucose meter with LCD, button interface, and USB charging detection. IC Role / Device Role / Timing Role: System-on-chip managing electrochemical sensor signal acquisition, LCD refresh, battery voltage monitoring, and USB enumeration timing. Use Value: Single 1.8–5.5 V supply powers entire system; internal 1.45 V A/D reference ensures stable glucose reading accuracy across battery discharge curve. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F10278ANA#U5 | 8 KB code flash, same 2 KB data flash, identical pinout and peripherals | Higher firmware capacity for complex protocol stacks (e.g., full BLE host stack) | Select when >4 KB application code size is required; no PCB change needed |
| R5F10377ANA#U5 | No data flash, no DMA, no CRC/RAM/SFR guard, ±5.0% oscillator accuracy | Limited to basic control tasks without field-updatable parameters or functional safety requirements | Choose only for lowest-cost, non-safety-critical applications where data retention and BGO are unnecessary |
Compared with R5F10277ANA#U5, R5F10278ANA#U5 offers scalable code density without sacrificing safety or low-power features, while R5F10377ANA#U5 trades away data flash, DMA, and hardware safety for reduced BOM cost - making it unsuitable for applications requiring firmware updates or IEC 60730 compliance.
Availability
R5F10277ANA#U5 is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial HMI panels, white goods control modules, and portable medical diagnostics requiring stable component supply and long-term lifecycle support.
Supply support for R5F10277ANA#U5 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.
The RL78/G12 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and safety-aware general-purpose control applications - balancing performance, integration, and energy efficiency.
FAQ
What is the maximum operating frequency of the R5F10277ANA#U5?
The R5F10277ANA#U5 supports a maximum high-speed on-chip oscillator frequency of 24 MHz with ±1.0% accuracy over –20°C to +85°C. When using an external crystal, the main system clock operates up to 20 MHz (VDD ≥ 2.7 V) or 8 MHz (VDD ≥ 1.8 V). The CPU achieves 31 DMIPS at 24 MHz, confirming its real-time capability for sensor fusion and communication protocols.
Does the R5F10277ANA#U5 include data flash memory?
Yes, the R5F10277ANA#U5 includes 2 KB of data flash memory with background operation (BGO) support, allowing program execution from code flash while rewriting data flash. This enables reliable firmware parameter storage and over-the-air update staging. Data flash endurance is rated at 1,000,000 write/erase cycles, and rewrites operate across the full 1.8–5.5 V supply range.
What safety features are integrated into the R5F10277ANA#U5?
The R5F10277ANA#U5 integrates CRC calculation hardware, RAM guard, and SFR guard - features exclusive to the R5F102 series and absent in R5F103 variants. These detect memory corruption and prevent unauthorized register access, supporting compliance with IEC 60730 Class B requirements for household appliances and industrial controllers without external safety monitors.
Can the R5F10277ANA#U5 operate from a 1.8 V supply?
Yes, the R5F10277ANA#U5 is fully specified for operation from 1.8 V to 5.5 V. At 1.8 V, it supports low-speed main system clock up to 8 MHz and maintains full functionality including 10-bit A/D conversion, UART, and simplified SPI/I²C interfaces. Its 63 μA/MHz active current and 0.52 μA STOP mode make it ideal for energy harvesting and coin-cell applications.
Is the R5F10277ANA#U5 pin-compatible with other RL78/G12 24-pin variants?
Yes, all RL78/G12 24-pin HWQFN variants - including R5F1027x and R5F1037x families - share identical pinouts and package dimensions (PWQN0024KE-A/PWQN0024KF-A). This allows direct substitution between R5F10277ANA#U5 and R5F10278ANA#U5 or R5F10377ANA#U5 on the same PCB, though functional differences (e.g., data flash presence, oscillator accuracy, safety features) must be validated per application.
R5F10277ANA#U5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 24-WFQFN Exposed Pad
- Series:
- RL78/G12
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- 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:
- 4KB (4K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 11x8/10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F10277ANA#U5 FAQ
1.How can I place an order for R5F10277ANA#U5 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F10277ANA#U5 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 R5F10277ANA#U5 reliable?
The price and inventory of R5F10277ANA#U5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F10277ANA#U5 is usually 5 days.
3.What payment methods are accepted for R5F10277ANA#U5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F10277ANA#U5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F10277ANA#U5?
R5F10277ANA#U5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F10277ANA#U5 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 R5F10277ANA#U5?
For technical support, including R5F10277ANA#U5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F10277ANA#U5 requirements.
6.How does Aetrix verify that R5F10277ANA#U5 is sourced from the original manufacturer or authorized distributors?
All R5F10277ANA#U5 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 R5F10277ANA#U5 meets industry standards.
7.What is the process for return or replacement of R5F10277ANA#U5?
All R5F10277ANA#U5 units undergo pre-shipment inspection (PSI). If there is an issue with R5F10277ANA#U5, 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 R5F10277ANA#U5 part is unused and in its original packaging.
Return procedure for R5F10277ANA#U5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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