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HomeProductsIntegrated Circuits (ICs)Embedded - MicrocontrollersR5F100LEAFB#50
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R5F100LEAFB#50 - Renesas Electronics America Inc

Manufacturer Part Number
R5F100LEAFB#50
Manufacturer
Renesas Electronics Corporation
Allelco Part Number
98D-R5F100LEAFB#50
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
38,369 pcs available, New & Original
Parts Description
IC MCU 16BIT 64KB FLASH 64LQFP
Package
64-LFQFP (10x10)
Data sheet
R5F100LEAFB#50.pdf
RoHs Status
ROHS3 Compliant
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In stock: 38369
  • Unit Price: $1.401
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $1.401 $1.40
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

R5F100LEAFB#50 Tech Specifications
Renesas Electronics America Inc - R5F100LEAFB#50 technical specifications, attributes, parameters and parts with similar specifications to Renesas Electronics America Inc - R5F100LEAFB#50

Product Attribute Attribute Value
Manufacturer Renesas Electronics Corporation
Voltage - Supply (Vcc/Vdd) 1.6V ~ 5.5V
Supplier Device Package 64-LFQFP (10x10)
Speed 32MHz
Series RL78/G13
RAM Size 4K x 8
Program Memory Type FLASH
Program Memory Size 64KB (64K x 8)
Peripherals DMA, LVD, POR, PWM, WDT
Package / Case 64-LQFP
Package Tape & Reel (TR)
Product Attribute Attribute Value
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Number of I/O 48
Mounting Type Surface Mount
EEPROM Size 4K x 8
Data Converters A/D 12x8/10b
Core Size 16-Bit
Core Processor RL78
Connectivity CSI, I²C, LINbus, UART/USART
Base Product Number R5F100

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN 3A991A2
HTSUS 8542.31.0001

Frequently Asked Questions(FAQ)

How does the R5F100LEAFB#50 perform in low-voltage applications compared to higher supply voltage operation, and what design considerations are necessary for stable operation at 1.6V?
The R5F100LEAFB#50 operates reliably from 1.6V to 5.5V, making it suitable for battery-powered and energy-efficient systems. At 1.6V, the microcontroller maintains core functionality but with reduced noise margins and potential limitations on I/O drive strength. Clock stability becomes more sensitive to power supply ripple and PCB layout parasitics. Designers should ensure clean power delivery using adequate bypass capacitance (typically 100nF ceramic per VDD pin) and verify timing constraints under worst-case conditions. While the internal oscillator remains functional across this range, external crystal accuracy may degrade slightly at lower voltages due to bias current variations.
In what scenarios would the R5F100LEAFB#50 be preferable over other Renesas RL78 variants such as the R5F100LEAFA#50, particularly regarding package and performance trade-offs?
The R5F100LEAFB#50 uses a 64-LQFP (10x10) package with a 0.5mm pitch, offering better thermal and electrical performance than smaller packages like the QFN used in some RL78 derivatives. Compared to the R5F100LEAFA#50, which shares the same base configuration, the FB# suffix typically denotes commercial-grade temperature range (-40°C to +85°C), while FA variants may target automotive or extended ranges. For industrial applications requiring robust I/O handling and moderate pin count without extreme space constraints, the LQFP provides superior signal integrity and ease of assembly versus compact alternatives.
What are the implications of selecting the R5F100LEAFB#50 for a system requiring precise analog-to-digital conversion, given its 12-channel 8/10-bit ADC?
With twelve programmable channels supporting both 8-bit and 10-bit resolution, the R5F100LEAFB#50 offers flexibility for multi-sensor monitoring but introduces non-uniformity risks if not properly managed. The ADC reference voltage defaults to VDD, so noise on the power rail directly affects conversion accuracy—especially critical when operating near 1.6V where headroom is limited. To achieve reliable 10-bit performance, implement star grounding, minimize trace lengths to sensor inputs, and use dedicated analog power filtering. Sampling rates must also be balanced against conversion time; exceeding 50ksps can cause channel crosstalk unless layout isolation is maintained.
How does the flash memory architecture of the R5F100LEAFB#50 influence firmware update strategies in production environments?
The 64KB flash block size enables efficient over-the-air or field updates, but requires careful management due to erase/write endurance limits (~10k cycles). Since the entire flash is erased before programming, partial updates necessitate bootloader-based buffering into RAM (4KB available), constraining payload size. Designers should partition flash into application, bootloader, and parameter sections, reserving at least 8KB for boot code and 4KB for runtime buffers. Wear leveling is unnecessary due to fixed structure, but power-loss protection during writes must be implemented via hardware supervision or capacitor backup.
Can the R5F100LEAFB#50 support real-time communication protocols like LINbus and UART simultaneously without significant latency impact?
Yes, the integrated LINbus transceiver and dual UART/USART modules allow concurrent operation, but shared resources such as clock sources and interrupt priorities affect determinism. At 32MHz core speed, baud rates up to 1Mbps (UART) and 20kbps (LIN) are achievable with minimal jitter. However, simultaneous high-speed transmissions increase electromagnetic interference and require attention to ground plane continuity. DMA channels can offload data transfers, reducing CPU overhead, but buffer sizes must align with protocol frame durations to prevent overflow.
What thermal characteristics should engineers consider when mounting the R5F100LEAFB#50 in compact enclosures with limited airflow?
Operating within -40°C to +85°C ensures reliability, but junction temperature depends on power dissipation and PCB copper coverage. The 64-pin LQFP has a θJA of approximately 45°C/W under typical FR4 conditions. In sealed enclosures, self-heating from active peripherals like PWM outputs or ADCs can raise case temperature beyond ambient. Engineers should minimize switching frequencies during idle periods, disable unused modules, and allocate sufficient ground pour beneath the IC to enhance heat spreading. Thermal vias under the exposed pad (if present) further reduce hotspot risk.
How does the watchdog timer (WDT) configuration affect system recovery in mission-critical applications using the R5F100LEAFB#50?
The WDT provides brown-out and software fault detection with user-programmable timeout (up to 2^18 core clocks). Proper initialization includes disabling reset on WDT timeout unless intentional reboots are desired, and ensuring periodic feed commands are placed in safe code sections. Misconfiguration can lead to premature resets during normal operation, especially if interrupts delay servicing. For safety-critical designs, pair the WDT with a windowed mode or external supervisor chip to avoid masking transient faults.
When interfacing the R5F100LEAFB#50 with legacy sensors using I²C, what pull-up resistor values and bus speeds are recommended for stable communication?
For standard-mode I²C (up to 100kHz), use 4.7kΩ pull-ups between SCL/SDA and VDD, adjusting based on bus capacitance. Long traces or multiple devices may require lower resistance (e.g., 2.2kΩ) to meet rise times < 1μs. Fast-mode (400kHz) demands tighter tolerances—pull-ups around 1kΩ with careful layout. The R5F100LEAFB#50’s open-drain drivers handle bidirectional signaling, but ensure voltage levels stay above 1.6V minimum logic high thresholds. Add series termination resistors (22–100Ω) near sensors to suppress ringing on long lines.
What precautions are essential when using the internal oscillator of the R5F100LEAFB#50 instead of an external crystal for cost-sensitive applications?
The internal 32kHz and high-speed RC oscillators offer convenience but exhibit ±2% frequency drift over temperature and voltage, impacting timing-sensitive tasks like UART baud rate accuracy or sleep wake-up intervals. Calibration routines using factory-trimmed values can mitigate deviations, though they consume flash space. Avoid relying solely on internal clocks for precision timing; use them only when external crystals add unacceptable BOM cost or board complexity. Always validate timing margins under actual operating conditions.
How does the presence of DMA channels in the R5F100LEAFB#50 improve data throughput in motor control applications utilizing PWM and ADC?
Four DMA channels enable automatic transfer of ADC results to RAM or peripheral buffers without CPU intervention, crucial for maintaining consistent sampling rates during PWM-driven motor phases. Without DMA, ISRs would stall execution, causing missed conversions and torque ripple. Configured correctly, DMA reduces interrupt frequency by an order of magnitude, freeing the CPU for control algorithms. However, channel arbitration must prioritize critical paths—e.g., ADC-to-memory over UART logging—to preserve real-time behavior.
What is the expected lifetime degradation of flash memory in the R5F100LEAFB#50 under continuous write/erase cycling in data-logging applications?
Endurance is rated for 10,000 erase/write cycles per sector, with typical data retention of 10 years at 85°C. In aggressive logging scenarios writing 1KB per hour, this equates to ~27 years of operation—well beyond most product lifecycles. However, wear concentration occurs in frequently updated sectors; implementing logical sector rotation or wear-leveling algorithms extends longevity. Avoid writing small random bytes; group data into larger blocks to reduce erase overhead.
How does the low-voltage detection (LVD) feature integrate with the power-on reset (POR) circuitry in the R5F100LEAFB#50 during brown-out events?
Both POR and LVD activate when VDD drops below thresholds (typically 2.5V nominal, adjustable via registers). POR ensures clean startup, while LVD triggers interrupts or resets if voltage falls during operation. Critical systems should disable LVD interrupts during flash writes to prevent corruption from spurious resets. Threshold settings must account for regulator droop under load transients—undershoot below POR/LVD levels may cause unpredictable states. Use external supervisors for stricter compliance in safety-rated designs.
What are the key differences between using CSI (Clock Synchronous Interface) and UART for serial communication in resource-constrained designs with the R5F100LEAFB#50?
CSI provides synchronous, bit-serial communication with explicit clock signals, enabling deterministic timing and higher throughput than UART in noisy environments. It consumes fewer pins but requires clock synchronization and lacks native framing. UART uses asynchronous start/stop bits, simplifying hardware interface and supporting variable baud rates, but susceptible to skew over long cables. For short-distance SPI-like transfers, CSI reduces GPIO usage; for modems or GPS modules, UART offers plug-and-play compatibility. Choose based on partner device capabilities and noise immunity needs.
How does the Moisture Sensitivity Level (MSL) rating of 3 for the R5F100LEAFB#50 affect reflow soldering profiles and storage requirements?
MSL 3 indicates the part can withstand up to 168 hours of exposure to ambient humidity before requiring baking. After opening packaging, store in dry cabinets with desiccant, and track time using labels. During reflow, adhere to JEDEC J-STD-020 guidelines: peak temperature ≤245°C, dwell above 217°C ≤60 seconds. Exceeding these parameters risks popcorning or bond wire damage. Pre-bake at 125°C for 24 hours may be needed if storage exceeded 8 weeks post-delivery.

Parts with Similar Specifications

The three parts on the right have similar specifications to Renesas Electronics America Inc R5F100LEAFB#50

Product Attribute R5F100LEAFB#10 R5F100LEAFB#V0 R5F100LEAFA#50 R5F100LEAFB#X0
Part Number R5F100LEAFB#10 R5F100LEAFB#V0 R5F100LEAFA#50 R5F100LEAFB#X0
Manufacturer Renesas Electronics America Inc Renesas Electronics America Inc Renesas Electronics America Inc Renesas Electronics America Inc
Data Converters - - - -
Program Memory Size - - - -
EEPROM Size - - - -
Connectivity - - - -
Program Memory Type - - - -
Core Processor - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Core Size - - - -
RAM Size - - - -
Speed - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Base Product Number - DAC34H84 MAX500 ADS62P42
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Number of I/O - - - -
Oscillator Type - - - -
Peripherals - - - -
Voltage - Supply (Vcc/Vdd) - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Series - - - -
Mounting Type - Surface Mount Through Hole Surface Mount

R5F100LEAFB#50 Datasheet PDF

Download R5F100LEAFB#50 pdf datasheets and Renesas Electronics America Inc documentation for R5F100LEAFB#50 - Renesas Electronics America Inc.

PCN Packaging
Label Change-All Devices 01/Dec/2022.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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2.00kg-3.00kg USD$50.00 - USD$100.00
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R5F100LEAFB#50 Image

R5F100LEAFB#50

Renesas Electronics America Inc
98D-R5F100LEAFB#50

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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