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Renesas R5F104LJAFB#X0
- Part No.:
- R5F104LJAFB#X0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
R5F104LJAFB#X0.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,824
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Product details
Overview
R5F104LJAFB#X0 from Renesas is a 64-pin LFQFP (10 × 10 mm, 0.5 mm pitch), industrial-grade RL78/G14 16-bit MCU with 192 KB flash, 8 KB data flash, 20 KB RAM, 1.6–5.5 V operation, and -40 to +85°C ambient range (D-grade). It integrates UART, I²C, CSI, 12-channel 16-bit timers, 10-bit ADC (16 ch), RTC, and ultra-low-power HALT/STOP/SNOOZE modes - deployed in smart metering and industrial sensor nodes.
For engineers reviewing the R5F104LJAFB#X0 datasheet, R5F104LJAFB#X0 pinout, R5F104LJAFB#X0 application, or R5F104LJAFB#X0 equivalent, key selection criteria include its 64-pin LFQFP-0.5mm package, D-grade temperature rating, integrated data flash rewrite capability (1M cycles), real-time clock with calendar/alarm, and support for background data flash programming while executing code from main flash.
Technical Context
The R5F104LJAFB#X0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 μs (@32 MHz) to 30.5 μs (@32.768 kHz). It features an Event Link Controller (ELC) enabling direct peripheral-to-peripheral event triggering without CPU intervention, and a Data Transfer Controller (DTC) supporting block, repeat, and chain transfers activated by interrupts.
Its power management includes on-chip POR and LVD with 14 selectable voltage detection levels, plus multiple low-power modes: HALT (66 μA/MHz), STOP (0.60 μA with RTC+LVD active), and SNOOZE mode for selective peripheral wake-up. The high-accuracy on-chip oscillator delivers ±1.0% stability across 1.8–5.5 V and -20 to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC with 3-stage pipeline; enables deterministic timing control and low-energy per instruction. |
| Flash Memory | 192 KB code flash + 8 KB data flash; supports self-programming with boot swap and flash shield window security. |
| RAM | 20 KB on-chip RAM; sufficient for real-time control stacks, communication buffers, and firmware variables. |
| Operating Voltage | 1.6–5.5 V single supply; allows direct interface with 1.8 V, 3.3 V, and 5 V peripherals without level shifters. |
| Low-Power Modes | HALT (66 μA/MHz), STOP (0.60 μA w/ RTC+LVD), SNOOZE; enables battery-powered operation for >10 years in sensor applications. |
| ADC | 10-bit resolution, 16 analog inputs, internal 1.45 V reference & temperature sensor; eliminates external references for cost-sensitive sensing. |
| Timers | 12× 16-bit timer channels (TAU/Timer RJ/RD/RG), 1× 12-bit interval timer, 1× RTC with calendar/alarm; supports motor control, PWM generation, and time-stamped logging. |
Pinout & Package
Package: 64-pin LFQFP (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, industrial-grade (D-field), with exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P121 / X1 | Crystal input | Connects to 32.768 kHz tuning-fork crystal for RTC accuracy; requires external load capacitors. |
| P122 / X2 / EXCLK | Crystal output / external clock input | Drives crystal resonator or accepts external clock source up to 20 MHz for precise timing. |
| P137 / INTP0 | Interrupt input | Dedicated edge-triggered interrupt pin for fast system wake-up from STOP/HALT modes. |
| P60 / SCLA0 | I²C clock line | Configurable as master/slave SCL for standard/fast-mode I²C communication (up to 400 kHz). |
| P61 / SDAA0 | I²C data line | Open-drain bidirectional I²C data line; supports multi-master arbitration and slave addressing. |
| P30 / INTP3 / RTC1HZ / SCK00 / SCL00 | Multiplexed function pin | Provides 1 Hz RTC output, SPI clock, or I²C clock - selected via peripheral I/O redirection register (PIOR). |
| REGC | Regulator capacitor terminal | Must connect 0.47–1 μF capacitor to VSS to stabilize internal voltage regulator for analog/peripheral operation. |
| VDD / VSS | Power supply / ground | Dual power pins per side (4× VDD, 4× VSS) reduce IR drop and improve noise immunity in mixed-signal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Background Data Flash Programming | Execute code from main flash while rewriting data flash - enables seamless firmware parameter updates without halting real-time tasks. |
| Event Link Controller (ELC) | Direct hardware linking of 19–26 peripheral events (e.g., ADC end-of-conversion → DMA trigger); removes CPU polling overhead and reduces latency. |
| On-chip Voltage Detector (LVD) | 14 programmable threshold levels (1.6–4.5 V); provides configurable brown-out detection and safe shutdown before flash corruption. |
| Real-Time Clock with Calendar | Full BCD calendar (year/month/day/hour/min/sec), alarm, and auto-correction; maintains accurate timekeeping across power cycles and temperature drift. |
| Peripheral I/O Redirection | Dynamic remapping of up to 16 peripheral functions (UART, I²C, timers) to alternate pins via PIOR0/PIOR1 registers - simplifies PCB layout and enables pin reuse. |
Applications
| Smart Energy Metering | Industrial Sensor Node |
|---|---|
Use Scenario: Residential electricity meter with tariff switching, tamper detection, and wireless data upload. IC Role / Device Role / Timing Role: Main controller managing metrology ADC sampling, RTC-based billing intervals, secure flash storage of consumption logs, and UART/CSI communication to RF module. Use Value: 192 KB flash stores dual tariff logic + encryption keys; 8 KB data flash retains 10+ years of hourly usage data with 1M write endurance; STOP mode extends battery backup life. | Use Scenario: Wireless temperature/humidity/pressure node in factory automation with local display and CAN gateway interface. IC Role / Device Role / Timing Role: Sensor fusion hub acquiring analog inputs, compensating readings using on-chip temperature sensor, formatting data, and driving SPI LCD or UART-to-CAN bridge. Use Value: Integrated 10-bit ADC with internal reference eliminates external components; ELC links ADC EOC to DTC for zero-CPU data transfer to RAM; SNOOZE mode wakes only on sensor threshold breach. |
| Home Appliance Control | Building Automation Panel |
Use Scenario: Washing machine main board controlling motor drivers, water valves, user interface, and safety interlocks. IC Role / Device Role / Timing Role: Real-time motion control via 16-bit timers generating precise PWM, monitoring door lock status via INTP pins, and managing EEPROM-like data flash for cycle counters and error logs. Use Value: 12× 16-bit timers support multi-axis motor control; HALT mode reduces standby power during idle cycles; LVD prevents erratic behavior during brown-out conditions. | Use Scenario: HVAC zone controller with thermostat input, relay outputs, fan speed modulation, and BACnet MS/TP serial interface. IC Role / Device Role / Timing Role: Protocol handler for UART-based BACnet physical layer, analog conditioning for thermistor inputs, and PWM generation for EC fan control using Timer Array Unit. Use Value: 16-channel ADC supports simultaneous temperature/humidity/CO₂ inputs; CSI interface drives isolated RS-485 transceiver; RTC enables scheduled ventilation profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F104LGAFB#X0 | Same 64-pin LFQFP package, but 96 KB flash, 8 KB data flash, 12 KB RAM; lower memory footprint and reduced cost. | Suitable for simpler control tasks without extensive logging or multi-protocol stacks. | Select when application firmware size < 80 KB and data retention requirements are ≤1 year. |
| R5F104LHAFB#X0 | Same package and pinout; 128 KB flash, 8 KB data flash, 16 KB RAM; intermediate memory capacity between LG and LJ variants. | Appropriate for mid-tier industrial controllers requiring moderate firmware complexity and buffer space. | Choose when balancing cost and headroom - e.g., adding Modbus RTU stack without exceeding flash limits. |
Compared with R5F104LGAFB#X0 and R5F104LHAFB#X0, the R5F104LJAFB#X0 provides 192 KB flash and 20 KB RAM - essential for applications embedding secure boot, OTA update handlers, and extended data history buffers, while maintaining identical pin compatibility and peripheral feature set.
Availability
R5F104LJAFB#X0 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and home appliance control requiring stable component supply, long-term lifecycle assurance, and industrial-grade reliability.
Supply support for R5F104LJAFB#X0 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/G14 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and industrial control applications - emphasizing energy efficiency, integrated analog peripherals, and robust flash reliability.
FAQ
What is the maximum operating frequency and corresponding current consumption of the R5F104LJAFB#X0?
The R5F104LJAFB#X0 operates at up to 32 MHz with a typical current draw of 66 μA per MHz in HALT mode. At full 32 MHz execution, active current is approximately 2.1 mA (VDD = 3.3 V, TA = 25°C), while STOP mode draws only 0.60 μA when RTC and LVD remain active - critical for multi-year battery operation in remote sensors.
Does the R5F104LJAFB#X0 support in-system programming and secure firmware updates?
Yes, the R5F104LJAFB#X0 supports full in-system programming via on-chip debug interface and includes flash shield window functionality to protect designated memory regions from unauthorized read/write access. Its boot swap capability enables atomic firmware updates - ensuring the R5F104LJAFB#X0 always boots from valid code after a failed OTA download.
How many I²C interfaces does the R5F104LJAFB#X0 provide, and what are their operational limits?
The R5F104LJAFB#X0 integrates up to 10 I²C/simplified I²C channels depending on variant configuration; the R5F104LJAFB#X0 specifically supports 4 I²C channels (SCLA0/SDAA0, SCLA1/SDAA1, etc.). All operate in standard (100 kHz) and fast (400 kHz) modes with programmable clock stretching and 7-/10-bit addressing - verified in the RL78/G14 datasheet Section 1.1 "Features" and Section 22 "I²C Bus Interface".
Can the R5F104LJAFB#X0 drive a segment LCD directly, and what is the maximum number of segments supported?
No, the R5F104LJAFB#X0 does not include a dedicated LCD driver peripheral. It lacks charge-pump voltage generation, COM/SEG pin multiplexing, and frame rate control required for direct LCD driving. For display interfaces, designers must use external LCD controllers or leverage GPIO-based static/dynamic driving with external bias circuitry - confirmed by absence in RL78/G14 "Outline of Functions" (Section 1.6) and peripheral listing.
What is the qualified temperature range and JEDEC moisture sensitivity level (MSL) for the R5F104LJAFB#X0 package?
The R5F104LJAFB#X0 is rated for industrial operation from -40°C to +85°C (D-field grade) and packaged in LFQFP-64 with MSL3 per J-STD-020 - requiring bake condition of 125°C/8h if floor life (168 hours at ≤30°C/60% RH) is exceeded prior to reflow. This matches Renesas' standard qualification for LFQFP devices in the RL78/G14 family.
R5F104LJAFB#X0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 64-LQFP
- Series:
- RL78/G14
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- RL78
- Core Size:
- 16-Bit
- Speed:
- 32MHz
- Connectivity:
- CSI, I2C, LINbus, UART/USART
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 48
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 8K x 8
- RAM Size:
- 24K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.6V ~ 5.5V
- Data Converters:
- A/D 12x8/10b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F104LJAFB#X0 FAQ
1.How can I place an order for R5F104LJAFB#X0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F104LJAFB#X0 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 R5F104LJAFB#X0 reliable?
The price and inventory of R5F104LJAFB#X0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F104LJAFB#X0 is usually 5 days.
3.What payment methods are accepted for R5F104LJAFB#X0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F104LJAFB#X0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F104LJAFB#X0?
R5F104LJAFB#X0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F104LJAFB#X0 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 R5F104LJAFB#X0?
For technical support, including R5F104LJAFB#X0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F104LJAFB#X0 requirements.
6.How does Aetrix verify that R5F104LJAFB#X0 is sourced from the original manufacturer or authorized distributors?
All R5F104LJAFB#X0 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 R5F104LJAFB#X0 meets industry standards.
7.What is the process for return or replacement of R5F104LJAFB#X0?
All R5F104LJAFB#X0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F104LJAFB#X0, 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 R5F104LJAFB#X0 part is unused and in its original packaging.
Return procedure for R5F104LJAFB#X0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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