About us Contact Us Submit BOM
RFQs(0)
English
Close Menu
View All

Please refer to the English Version as our Official Version.Return

Europe
France(Français) Germany(Deutsch) Italy(Italia) Russian(русский) Poland(polski) Czech(Čeština) Luxembourg(Lëtzebuergesch) Netherlands(Nederland) Iceland(íslenska) Hungarian(Magyarország) Spain(español) Portugal(Português) Turkey(Türk dili) Bulgaria(Български език) Ukraine(Україна) Greece(Ελλάδα) Israel(עִבְרִית) Sweden(Svenska) Finland(Svenska) Finland(Suomi) Romania(românesc) Moldova(românesc) Slovakia(Slovenská) Denmark(Dansk) Slovenia(Slovenija) Slovenia(Hrvatska) Croatia(Hrvatska) Serbia(Hrvatska) Montenegro(Hrvatska) Bosnia and Herzegovina(Hrvatska) Lithuania(lietuvių) Spain(Português) Switzerland(Deutsch) United Kingdom(English)
Asia/Pacific
Japan(日本語) Korea(한국의) Thailand(ภาษาไทย) Malaysia(Melayu) Singapore(Melayu) Vietnam(Tiếng Việt) Philippines(Pilipino)
Africa, India and Middle East
United Arab Emirates(العربية) Iran(فارسی) Tajikistan(فارسی) India(हिंदी) Madagascar(malaɡasʲ)
South America / Oceania
New Zealand(Maori) Brazil(Português) Angola(Português) Mozambique(Português)
North America
United States(English) Canada(English) Haiti(Ayiti) Mexico(español)
HomeProductsIntegrated Circuits (ICs)Specialized ICsR5F100LEAFB
Image may be representation.
See specifications for product details.
Share
 Favorite
EXPRESS OPTION
Payment method

R5F100LEAFB - Renesas Electronics Corporation

Manufacturer Part Number
R5F100LEAFB
Manufacturer
Renesas Electronics Corporation
Allelco Part Number
32D-R5F100LEAFB
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
14,010 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
Compare
Our certification
In stock: 14010

Required fields are indicated by an asterisk (*)
Please send RFQ, we will respond immediately.

Quantity

Specifications

R5F100LEAFB Tech Specifications
Renesas Electronics Corporation - R5F100LEAFB technical specifications, attributes, parameters and parts with similar specifications to Renesas Electronics Corporation - R5F100LEAFB

Product Attribute Attribute Value
Part Number R5F100LEAFB
Package DAC91001
Description DAC91001
Stock Condition Get 14010 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer Renesas Electronics Corporation
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Frequently Asked Questions(FAQ)

What is the optimal operating voltage range for the R5F100LEAFB microcontroller when power efficiency and noise margin are critical design constraints in a battery-powered embedded system?
The R5F100LEAFB operates reliably between 1.6V and 5.5V, but for maximum power efficiency in low-power applications, operation near the lower end of this range—closer to 1.8V to 2.2V—is preferred due to reduced dynamic power consumption proportional to V². However, this must be balanced against noise immunity and timing margins; at lower voltages, clock stability and I/O switching thresholds degrade, potentially increasing susceptibility to electromagnetic interference. Designers should verify signal integrity under minimum supply conditions using the RL78/G1x family’s typical leakage and threshold characteristics.
How does the R5F100LEAFB compare to other RL78 family members like the R5F100MEA or R5F100PEA in terms of memory architecture and peripheral integration for motor control applications requiring precise timing?
The R5F100LEAFB offers 64kB of program memory and 4kB of data RAM within a 68kB ROM structure, which is sufficient for complex state machines and interrupt-driven motor control logic. Unlike the R5F100PEA, which includes a dedicated motor control timer unit (MCTU), the LEA variant relies on general-purpose timers (9 total) and lacks hardware commutation support. Compared to the R5F100MEA, it provides fewer GPIO pins (58 vs. 64) and identical ADC resolution, making it less suitable for multi-sensor feedback loops in high-channel-count motor drives.
Can the R5F100LEAFB drive high-current loads directly from its GPIO pins without external buffering, given its package is QFP64 with limited thermal dissipation?
No, the R5F100LEAFB cannot safely drive high-current loads directly. Each GPIO pin typically sources/sinks up to 20mA under normal conditions, but continuous current beyond 5–10mA per pin risks exceeding total chip power dissipation limits, especially in the QFP64 package with moderate thermal conductivity. For loads exceeding 50mA, external MOSFETs or drivers must be used, and PCB layout must minimize trace resistance and ensure adequate copper pour for heat spreading during peak operation.
What are the implications of selecting the R5F100LEAFB over an ARM Cortex-M0+ equivalent when targeting cost-sensitive consumer electronics with strict BOM optimization goals?
The R5F100LEAFB leverages Renesas’ ultra-low-power RL78 core optimized for 8/16-bit control tasks, offering significantly lower active and standby current compared to many Cortex-M0+ parts at similar frequencies. While M0+ devices often integrate more peripherals and faster flash, the RL78’s instruction set and clock gating reduce code complexity and enable wake-up times under 5µs—critical for energy harvesting applications. However, the R5F100LEAFB lacks floating-point units and DSP extensions, making it less efficient for signal processing workloads where an M0+ might justify higher quiescent current.
Is it feasible to use the internal oscillator of the R5F100LEAFB at full 32MHz performance without external crystal calibration in a temperature-stressed industrial environment ranging from -40°C to +85°C?
The internal RC oscillator of the R5F100LEAFB is factory-calibrated but exhibits frequency drift of ±2% over the industrial temperature range (-40°C to +85°C). At 32MHz, this equates to ±640kHz variation, which may violate communication protocol tolerances (e.g., UART baud rate accuracy >0.5%). For precise timing applications like USB or synchronous serial interfaces, an external crystal is strongly recommended. If using the internal oscillator, software compensation or periodic re-synchronization may be necessary to maintain data integrity.
How does the interrupt latency of the R5F100LEAFB affect real-time response in safety-critical automotive applications requiring sub-10µs reaction to sensor events?
The R5F100LEAFB supports fast context saving and nested interrupts, enabling worst-case interrupt latency as low as 4–6 cycles (~125ns at 32MHz). With minimal overhead from shadow registers and priority handling, total response time can reach ~2–3µs, well below the 10µs threshold. However, this assumes no flash wait states during fetch and that the ISR executes efficiently. In practice, deep sleep modes or flash access contention could extend latency; thus, timing-critical routines should reside in RAM or use prefetch buffers.
What considerations apply when interfacing the R5F100LEAFB’s I2C and SPI peripherals to non-standard logic levels (e.g., 3.3V sensors on a 1.8V system) without level shifters?
The R5F100LEAFB’s I2C and SPI modules are 5V-tolerant only if powered at 5V. When operated at 1.6–3.3V, driving higher-voltage devices requires external level shifting. Attempting to connect 3.3V SDA/SCL lines directly to a 1.8V-powered R5F100LEAFB risks violating absolute maximum ratings and causing latch-up. Similarly, receiving 5V signals without protection may damage inputs. Use bidirectional level translators or resistive dividers with Schmitt triggers for robust communication across voltage domains.
Given the R5F100LEAFB’s 12-bit ADC with 4kB data ROM, what sampling strategies maximize resolution and throughput when monitoring multiple analog channels in a data acquisition system?
The 12-bit ADC achieves 1.5 effective bits of resolution under ideal conditions but degrades with noise. To maximize performance, sample each channel at least twice the Nyquist rate after settling delays (>1µs). Use the data ROM buffer to store conversion results for batch DMA transfers, minimizing CPU overhead. Sequential scanning across all 12 channels at 1MSPS yields ~83ksps per channel, sufficient for slow-varying signals. Avoid oversampling unless averaging is needed, as the RL78 lacks hardware decimation filters.
Why might the R5F100LEAFB experience unexpected resets during firmware updates via UART, despite stable power rails and correct boot configuration?
Unexpected resets during UART-based programming could stem from brown-out detection (BOD) triggering if transient dips occur during flash erase/write cycles, which consume peak current exceeding stable supply capacity. The R5F100LEAFB has configurable BOD thresholds (typically 2.7V), so even brief voltage drops below this during high-current operations can reset the device. Ensure decoupling capacitors are placed close to VDD pins and that programming voltage remains steady. Also check for ESD-induced glitches on RX lines during long update sequences.
How does the R5F100LEAFB handle stack overflow in deeply recursive functions, and what safeguards should be implemented to prevent system failure?
The R5F100LEAFB uses a single hardware stack managed by the compiler, with default depth depending on toolchain settings (often 128 bytes). Recursive functions quickly exhaust this space, leading to silent corruption or hard faults. Best practice involves converting recursion to iteration, limiting call depth, or manually allocating static buffers. Tools like Renesas CC-RL can analyze stack usage; always review generated maps to ensure remaining stack exceeds worst-case nesting by at least 20%.
In what scenarios would the R5F100LEAFB be preferable to a discrete MCU solution when developing a compact IoT sensor node with integrated RF and environmental sensing?
The R5F100LEAFB excels in space-constrained designs due to its QFP64 footprint and integrated peripherals—ADC, timers, UART, I2C, and SPI eliminate need for external interface chips. Its ultra-low sleep current (~0.1µA typ.) enables years of battery life in intermittent-wake sensor nodes. Discrete alternatives require additional ICs for ADCs and communication, increasing board area and BOM count. However, if the node requires Wi-Fi or BLE, the R5F100LEAFB alone cannot replace a full SoC, but works well as a companion controller managing sensors and radio handshaking.

Customers Also Interested in

Recommended Products

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.

Write a Review

Your Email address will not be published.

Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
  1. Visual inspection
  2. Performance testing and reliability verification
  3. Standardized full-process testing
  4. Precise control of every parameter
We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
Quality Inspection
Quality Inspection Image - 01
Quality Inspection Image - 02
Quality Inspection Image - 03
Quality Inspection Image - 04

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.
  • HKBea
  • Paypal
  • MasterCard
  • Western-Union
  • VISA
Stable Delivery, Sincere Partnership — Your Faithful Supply Chain Partner
  • Efficient Supply Management
  • Cost-Saving Procurement
  • Fast Sourcing & Delivery
Contact us if you have any questions.

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
  • SMTA
  • IPC
  • ESD
  • PSMA
Renesas Electronics Corporation

R5F100LEAFB

Renesas Electronics Corporation
32D-R5F100LEAFB

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

Allelco
About Us
History
Certifications
Recruitment
Policies
Terms & Conditions
Privacy Policy
Cookie Policy
Services
Order Tracking
Return & Replacement
Frequently Asked Questions
Contact Us
Order
Shipping & Delivering
Payment Methods
My Account
The BlogsHot PartsChange LanguageNewsSite map
Contact Us
Headquarters Address:
Room C 13/F Harvard Commercial Building
105-111 Thomson Road Wan Chai
HongKong
Service Tel: +852-91464856
Service Email: info@allelco.com
Follow us
Copyright © 2012-2025 AllelcoElec.com. All rights reserved.
0 RFQ
Shopping cart (0 Items)
It is empty.
Submit RFQ
Compare List (0 Items)
It is empty.
Feedback

Your feedback matters! At Allelco, we value the user experience and strive to improve it constantly.
Please share your comments with us via our feedback form, and we'll respond promptly.
Thank you for choosing Allelco.

Subject
E-mail
Comments
Captcha
Drag or click to upload file
Upload File
types: .xls, .xlsx, .doc, .docx, .jpg, .png and .pdf.
Max file size: 10MB