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Renesas R5F10RJ8AFA#50
- Part No.:
- R5F10RJ8AFA#50
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 52-LQFP
- Datasheet:
-
R5F10RJ8AFA#50.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 52LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
R5F10RJ8AFA#50 from Renesas is an 8 KB flash, 1 KB RAM, 52-pin LQFP (10 × 10 mm, 0.65 mm pitch) RL78/L12 microcontroller with integrated LCD controller/driver, 10-bit ADC (10 channels), RTC, and ultra-low-power operation (0.64 µA in Halt mode with RTC + LVD). It targets battery-powered LCD display systems such as smart meters, thermostats, and portable medical devices.
For engineers reviewing the R5F10RJ8AFA#50 datasheet, R5F10RJ8AFA#50 pinout, R5F10RJ8AFA#50 application, or R5F10RJ8AFA#50 equivalent, key selection criteria include its 52-pin LQFP package, 8 KB code flash + 2 KB data flash, LCD drive capability (up to 35 seg × 8 com), 1.6–5.5 V supply range, and -40°C to +85°C industrial temperature grade.
Technical Context
The R5F10RJ8AFA#50 implements the 16-bit RL78 CPU core delivering 31 DMIPS at 24 MHz, with Harvard architecture, 3-stage pipeline, and 86% of instructions executed in 1–2 clock cycles. It integrates a high-speed on-chip oscillator (24 MHz ±1% over voltage/temperature) and supports multiple clock sources including external crystals (X1/X2, XT1/XT2).
Its peripheral set includes UART, I²C, two CSI (SPI-compatible) interfaces, DMA (2 channels), 8-channel 16-bit timer array, 12-bit interval timer, windowed watchdog, and safety features compliant with IEC/UL 60730 - all optimized for low-power LCD-based embedded control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 16-bit RL78 CPU, 31 DMIPS @ 24 MHz - enables real-time sensor processing and UI responsiveness in resource-constrained LCD applications. |
| Memory | 8 KB code flash + 2 KB data flash + 1 KB RAM - sufficient for firmware with background data logging and LCD frame buffer storage. |
| Power Consumption | Halt mode: 0.64 µA (RTC + LVD active); Operating: 62.5 µA/MHz - extends battery life in always-on display systems. |
| LCD Driver | Supports up to 35 segments × 8 commons via capacitor split/internal boost methods - drives multi-digit segment displays without external bias circuitry. |
| Analog Peripherals | 10-bit ADC (10 channels, 2.1 µs conversion), internal 1.45 V reference, on-chip temperature sensor - enables direct sensing of environmental parameters. |
| Operating Range | 1.6 V to 5.5 V supply; -40°C to +85°C ambient - suitable for wide-input battery and industrial-grade environments. |
| Package | 52-pin LQFP, 10 × 10 mm, 0.65 mm pitch - standard surface-mount footprint compatible with automated assembly and thermal management. |
Pinout & Package
52-pin plastic LQFP (10 × 10 mm, 0.65 mm pitch), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P10–P17 | Port 1 I/O | General-purpose CMOS I/O with interrupt capability (INTP1/INTP2), configurable for SPI, UART, or LCD segment drive. |
| P20/P21 | Analog Input / Reference | ANI0/ANI1 inputs with AVREFP/AVREFM - enable precision analog sensing using internal 1.45 V reference. |
| P30–P32 | Timer I/O / RTC | TI01/TO01, TI03/TO03, RTC1HZ output - support PWM generation, capture timing, and real-time calendar functions. |
| P40–P42 | Port 4 I/O / Tool Interface | TOOL0, ANI16/ANI17, TI04/TI05 - provide debug access, additional analog inputs, and timer inputs for system expansion. |
| P50/P51 | Port 5 I/O / Key Return | INTP5, TI06/TO06 - support keypad scanning (KR0–KR3 mapped to P70/P71/P31/P30) and auxiliary timer functions. |
| P60/P61 | I²C Interface | SCLA0/SDAA0 - enable communication with EEPROMs, sensors, or other I²C peripherals without GPIO bit-banging. |
| P121/P122 | Crystal Oscillator | X1/X2 - connect external 1–20 MHz crystal for precise main system clock; supports HS/LV/LV modes per supply voltage. |
| P126/P127 | LCD Capacitor Terminals | CAPL/CAPH - interface external capacitors for internal voltage boosting, eliminating need for external DC-DC converter. |
| COM0–COM7 | LCD Common Outputs | Drive up to 8 common lines - configure for 35×8 or 39×4 multiplexed LCD panels with software-adjustable contrast (16 steps). |
| SEG0–SEG36 | LCD Segment Outputs | 37 dedicated segment drivers - support alphanumeric, icon, or custom symbol rendering in low-power display applications. |
| VDD/VSS | Power/Ground | Single 1.6–5.5 V supply; no separate analog/digital rails required - simplifies PCB power design. |
| REGC | Regulator Decoupling | Connect 0.47–1 µF capacitor to VSS - stabilizes internal voltage regulator for consistent low-power operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Halt mode | 0.64 µA with RTC and LVD active - enables years of operation on coin-cell batteries in standby display applications. |
| Integrated LCD controller/driver | Configurable for 35 seg × 8 com or 39 seg × 4 com with internal boost - eliminates external LCD bias IC and reduces BOM count. |
| On-chip debug interface | 1-wire on-chip debug (TOOL0/P40) - enables full programming and real-time debugging without JTAG header space or extra pins. |
| Data flash with background operation | 2 KB, 1 million erase cycles, 1.8–5.5 V programming - allows reliable nonvolatile parameter storage during runtime without halting execution. |
| IEC/UL 60730 safety compliance | Includes CRC, RAM parity, SFR write protection, illegal access detection - meets Class B functional safety requirements for white goods and medical devices. |
| Flexible clock system | High-speed on-chip oscillator (24 MHz ±1%), external crystal (X1/X2), subsystem clock (XT1/XT2), low-speed internal (15 kHz) - enables dynamic clock gating and wake-up optimization. |
Applications
| Smart Energy Meter Display | Programmable Thermostat UI |
|---|---|
|
Use Scenario: Battery-powered residential electricity meter with segmented LCD showing kWh, tariff, and time-of-use data. IC Role / Device Role / Timing Role: Main system controller executing metering firmware, driving 4-digit LCD, managing RTC calendar, and logging usage data to data flash. Use Value: 0.64 µA Halt current extends 10-year battery life; integrated LCD driver eliminates external bias IC; 2 KB data flash stores 30+ days of consumption history. |
Use Scenario: HVAC thermostat with 3-line alphanumeric LCD, temperature sensor input, and user button interface. IC Role / Device Role / Timing Role: Central UI processor handling keypad scan (KR0–KR3), ADC sampling of NTC thermistor, RTC-based scheduling, and segment display updates. Use Value: 10-bit ADC with internal reference ensures ±0.5°C accuracy; 16-step contrast adjustment maintains readability across lighting conditions; 1.6 V min operation supports aging alkaline cells. |
| Portable Medical Glucometer | Industrial Panel Indicator |
|
Use Scenario: Handheld blood glucose monitor with LCD, test strip interface, and Bluetooth LE connectivity (via UART). IC Role / Device Role / Timing Role: Primary MCU managing strip electrochemical measurement (ADC), LCD display, button navigation, and UART-to-BLE bridge. Use Value: On-chip temperature sensor compensates for strip reaction kinetics; 62.5 µA/MHz efficiency minimizes heat during measurement; safety features support FDA Class II compliance. |
Use Scenario: DIN-rail mounted machine status indicator with 7-segment LCD, relay control outputs, and RS-485 communication. IC Role / Device Role / Timing Role: Dedicated display controller receiving Modbus commands via UART/I²C, updating LCD segments, and monitoring digital inputs. Use Value: 52-pin LQFP provides ample GPIO for relay drivers and status LEDs; 1.6–5.5 V range accommodates 24 VDC industrial supplies with simple LDO; -40°C to +85°C rating ensures field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F10RJAAFA#50 | 16 KB flash, same 52-pin LQFP package, identical peripherals and pinout - direct upgrade path with doubled code space. | Required when firmware exceeds 8 KB or needs larger bootloader/data partition. | Select for future-proofing or complex UI logic requiring >8 KB code memory. |
| R5F10RJCAFA#50 | 32 KB flash, same 52-pin LQFP package, identical peripherals and pinout - highest-density variant in R5F10RJx family. | Necessary for applications integrating USB stack, advanced encryption, or multi-language UI assets. | Choose when long-term feature expansion or OTA update capability demands maximum flash headroom. |
Compared with R5F10RJ8AFA#50, the R5F10RJAAFA#50 and R5F10RJCAFA#50 offer scalable flash capacity while preserving identical pin compatibility, peripheral configuration, and low-power behavior - enabling seamless hardware reuse across product tiers without PCB redesign.
Availability
R5F10RJ8AFA#50 is available at Aetrix Electronics and suitable for smart energy meters, programmable thermostats, portable medical devices, and industrial panel indicators requiring stable component supply and long-term lifecycle support.
Supply support for R5F10RJ8AFA#50 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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The RL78/L12 family is designed specifically for ultra-low-power LCD-based applications, integrating high-efficiency CPU, on-chip LCD driver, and safety-certified peripherals to reduce system cost and complexity.
FAQ
What is the operating voltage range of the R5F10RJ8AFA#50?
The R5F10RJ8AFA#50 operates from 1.6 V to 5.5 V across its full temperature range (-40°C to +85°C), enabling direct use with single-cell Li-ion, 2-cell alkaline, or regulated 3.3 V/5 V supplies without level-shifting circuitry. This wide range supports both battery longevity and industrial robustness.
Does the R5F10RJ8AFA#50 support external crystal oscillators?
Yes, the R5F10RJ8AFA#50 supports external crystal oscillators on X1/X2 pins (1–20 MHz for main system clock) and XT1/XT2 pins (32.768 kHz for subsystem/RTC clock). These can be used simultaneously with the 24 MHz on-chip oscillator for hybrid clock architectures and precise timing recovery.
How many LCD segments and commons does the R5F10RJ8AFA#50 drive?
The R5F10RJ8AFA#50 drives up to 35 segments and 8 commons (35 × 8) or 39 segments and 4 commons (39 × 4) using capacitor split, internal voltage boost, or resistance division methods. Its SEG0–SEG36 and COM0–COM7 pins are fully dedicated and configurable via register settings.
What safety certifications apply to the R5F10RJ8AFA#50?
The R5F10RJ8AFA#50 includes hardware-level safety features aligned with IEC/UL 60730 Class B requirements: flash memory CRC calculation, RAM parity error check, SFR write protection, illegal memory access detection, clock frequency monitoring, and ADC self-test - all implemented in silicon without software overhead.
Is the R5F10RJ8AFA#50 pin-compatible with other RL78/L12 variants?
Yes, all R5F10RJx variants (R5F10RJ8AFA#50, R5F10RJAAFA#50, R5F10RJCAFA#50) share identical 52-pin LQFP packaging, pinout, and peripheral mapping. Only flash size differs (8 KB / 16 KB / 32 KB), allowing drop-in replacement for firmware scalability without layout changes.
R5F10RJ8AFA#50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 52-LQFP
- Series:
- RL78/L12
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- RL78
- Core Size:
- 16-Bit
- Speed:
- 24MHz
- Connectivity:
- CSI, I2C, LINbus, UART/USART
- Peripherals:
- DMA, LCD, LVD, POR, PWM, WDT
- Number of I/O:
- 37
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.6V ~ 5.5V
- Data Converters:
- A/D 10x8/10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F10RJ8AFA#50 FAQ
1.How can I place an order for R5F10RJ8AFA#50 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F10RJ8AFA#50 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 R5F10RJ8AFA#50 reliable?
The price and inventory of R5F10RJ8AFA#50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F10RJ8AFA#50 is usually 5 days.
3.What payment methods are accepted for R5F10RJ8AFA#50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F10RJ8AFA#50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F10RJ8AFA#50?
R5F10RJ8AFA#50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F10RJ8AFA#50 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 R5F10RJ8AFA#50?
For technical support, including R5F10RJ8AFA#50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F10RJ8AFA#50 requirements.
6.How does Aetrix verify that R5F10RJ8AFA#50 is sourced from the original manufacturer or authorized distributors?
All R5F10RJ8AFA#50 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 R5F10RJ8AFA#50 meets industry standards.
7.What is the process for return or replacement of R5F10RJ8AFA#50?
All R5F10RJ8AFA#50 units undergo pre-shipment inspection (PSI). If there is an issue with R5F10RJ8AFA#50, 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 R5F10RJ8AFA#50 part is unused and in its original packaging.
Return procedure for R5F10RJ8AFA#50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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