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Renesas R7FS3A6783A01CNF#AC0
- Part No.:
- R7FS3A6783A01CNF#AC0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
R7FS3A6783A01CNF#AC0.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 40HWQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,448
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Product details
Overview
R7FS3A6783A01CNF#AC0 from Renesas is a 40-pin QFN-packaged Arm Cortex-M4 microcontroller operating at up to 48 MHz, featuring 256 KB code flash, 32 KB SRAM, USB 2.0 Full-Speed with battery charging v1.2 support, 14-bit ADC, and integrated Segment LCD Controller (SLCDC) and Capacitive Touch Sensing Unit (CTSU) for HMI-rich industrial and consumer control applications.
For engineers reviewing the R7FS3A6783A01CNF#AC0 datasheet, R7FS3A6783A01CNF#AC0 pinout, R7FS3A6783A01CNF#AC0 application, or R7FS3A6783A01CNF#AC0 equivalent, key selection considerations include its 40-pin QFN (6 mm × 6 mm, 0.5 mm pitch) footprint, -40°C to +105°C temperature grade, 25 I/O pins with 2×5-V-tolerant capability, and dedicated hardware for capacitive touch sensing and segment LCD driving in space-constrained embedded designs.
Technical Context
This MCU implements an Armv7E-M architecture with single-precision FPU and 8-region Memory Protection Unit (MPU), enabling deterministic real-time execution and memory isolation for safety-critical firmware. Its clock system integrates HOCO (up to 48 MHz), SOSC (32.768 kHz), and CAC for runtime frequency accuracy validation.
The peripheral set is optimized for human-machine interface and sensor fusion: dual AGT timers support low-power event timing, SSIE enables PCM audio interfacing up to 50 MHz, and the SCE5 crypto engine provides AES128/256, GHASH, and TRNG for secure firmware updates and data encryption - all coordinated via ELC for CPU-free inter-peripheral triggering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 48 MHz max - enables floating-point math for motor control and sensor signal processing without software emulation. |
| Memory | 256 KB code flash / 8 KB data flash / 32 KB SRAM - supports robust firmware storage, parameter retention, and real-time buffer allocation. |
| Analog Peripherals | 14-bit ADC (11 channels), 12-bit DAC, 2× ACMPLP, 4× OPAMP, TSN - delivers high-resolution sensing and analog conditioning for closed-loop control. |
| Human Interface | SLCDC (up to 34 seg × 8 com), CTSU (10 electrodes) - drives multiplexed LCDs and detects touch through insulating overlays without external ICs. |
| Connectivity | USBFS (host/device, v2.0 FS + BC1.2), CAN, 4× SCI, 2× IIC, 2× SPI, SSIE - enables wired communication across industrial, automotive, and audio subsystems. |
| Package & Temp | 40-pin QFN (6 mm × 6 mm, 0.5 mm pitch), -40°C to +105°C - suitable for compact, thermally demanding industrial control modules. |
| Power Range | VCC = 1.6 V to 5.5 V - allows direct connection to 3.3 V or 5 V rails and simplifies power design in mixed-voltage systems. |
Pinout & Package
Package: 40-pin QFN (PWQN0040KC-A), 6 mm × 6 mm, 0.5 mm pitch, exposed thermal pad, RoHS-compliant Sn plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC, VSS, VBATT | Power supply inputs | VCC powers core/peripherals (1.6–5.5 V); VSS is ground reference; VBATT maintains RTC and backup registers during main power loss. |
| XTAL/EXTAL, XCIN/XCOUT | Clock source interfaces | Support external crystal (1–20 MHz) or sub-clock (32.768 kHz) for precise timing and low-power RTC operation. |
| SWDIO/SWCLK/SWO | Debug interface | Enable serial-wire debug and trace without JTAG pins - reduces debug footprint and simplifies PCB layout. |
| GTIOC0A–GTIOC7A | PWM/timer I/O | Support input capture, output compare, and complementary PWM generation for BLDC motor control and precision timing. |
| CTSU0–CTSU9 | Capacitive touch inputs | Dedicated CTSU electrode pins (10 total) with built-in charge-transfer circuitry - eliminate external RC networks for touch buttons/sliders. |
| SEG0–SEG33, COM0–COM7 | Segment LCD drive outputs | Direct drive of up to 34 segments × 8 commons - reduces BOM by integrating LCD bias generation and waveform control. |
Key Features
| Feature | Design Value |
|---|---|
| USB Battery Charging v1.2 | Enables direct USB port charging of connected batteries without external charger ICs - critical for portable HMI devices. |
| Hardware CTSU Engine | Offloads touch sensing computation from CPU, achieving <10 μA active current per electrode - extends battery life in always-on touch interfaces. |
| SLCDC with Contrast Control | 16-step internal voltage boosting allows dynamic LCD contrast adjustment via register write - eliminates external potentiometer or DAC. |
| ECC + Parity SRAM Protection | 16 KB SRAM with ECC and 16 KB with parity detect - meets IEC 61508 SIL-2 requirements for fault-tolerant industrial firmware execution. |
| Event Link Controller (ELC) | Routes 128+ peripheral events (e.g., ADC end-of-conversion → DMA trigger) without CPU intervention - reduces latency and ISR overhead in sensor acquisition. |
Applications
| Industrial HMI Panel | Smart Thermostat |
|---|---|
Use Scenario: Compact wall-mounted control panel with segmented LCD display and capacitive touch keys for HVAC system configuration. IC Role / Device Role / Timing Role: R7FS3A6783A01CNF#AC0 serves as the primary controller, driving the LCD via SLCDC, scanning touch electrodes via CTSU, and managing USB-based firmware updates. Use Value: Integrated SLCDC and CTSU eliminate 3 external ICs; 40-pin QFN enables PCB area reduction >35% versus 64-pin alternatives while maintaining full HMI functionality. | Use Scenario: Battery-powered residential thermostat requiring low standby current, local touch interface, and BLE gateway connectivity (via UART-to-BLE module). IC Role / Device Role / Timing Role: R7FS3A6783A01CNF#AC0 executes environmental sensing (ADC + TSN), manages touch UI, and communicates with BLE module via SCI0 UART. Use Value: 1.6 V minimum operating voltage and AGT timers enable <1.2 μA deep-sleep current; integrated DAC12 calibrates sensor offsets in firmware without external components. |
| Programmable Logic Controller (PLC) I/O Module | USB-C Powered Test Fixture |
Use Scenario: DIN-rail mounted I/O expansion module with analog input conditioning, digital I/O, and USB host interface for configuration and data logging. IC Role / Device Role / Timing Role: R7FS3A6783A01CNF#AC0 acquires 11-channel analog signals via ADC14, isolates digital I/O via GPIO, and acts as USB host to enumerate flash drives or PC hosts. Use Value: USBFS with on-chip transceiver and 5-V tolerant pins allow direct USB-C receptacle connection; CAC validates clock integrity for deterministic scan-cycle timing in PLC run mode. | Use Scenario: Portable electronics test fixture powered solely via USB-C PD (5 V), performing automated functional tests on PCBAs using analog stimulus and digital pattern generation. IC Role / Device Role / Timing Role: R7FS3A6783A01CNF#AC0 generates calibrated analog test signals (DAC12), captures response waveforms (ADC14), and logs results to USB mass storage. Use Value: On-chip USBFS LDO supplies internal 3.3 V rail directly from 5 V USB - removes need for external DC-DC converter; 256 KB flash stores multiple test scripts and calibration tables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R7FS3A6783A01CFL#AA0 | 48-pin LQFP package (10 mm × 10 mm), 33 I/O pins, same memory/peripherals | Requires larger PCB area; better heat dissipation but no thermal pad | Select when board layout accommodates larger footprint and enhanced thermal performance is needed over miniaturization. |
| R7FS3A6783A01CNE#AA0 | 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), 33 I/O pins, adds SSIE and 2× SPI | Enables audio interface and additional SPI peripherals; same 105°C rating | Choose when SSIE-based audio feedback or second SPI bus (e.g., for display or sensor array) is required alongside touch/LCD. |
Compared with R7FS3A6783A01CNF#AC0, the 48-pin alternatives offer more I/O and peripheral channels but increase board area by ≥22%; the 40-pin QFN delivers optimal density for space-limited HMI designs where 25 I/O and core peripherals suffice.
Availability
R7FS3A6783A01CNF#AC0 is available at Aetrix Electronics and suitable for industrial HMI panels, smart thermostats, and USB-C powered test fixtures requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for R7FS3A6783A01CNF#AC0 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 enterprise applications.
The R7FS3A6783A01CNF#AC0 belongs to the Synergy S3A6 microcontroller group, designed specifically for cost-sensitive, space-constrained human-machine interface applications requiring integrated LCD driving, capacitive touch, USB connectivity, and industrial-grade reliability.
FAQ
What is the maximum operating frequency of the R7FS3A6783A01CNF#AC0?
The R7FS3A6783A01CNF#AC0 operates at a maximum frequency of 48 MHz using its Arm Cortex-M4 core with FPU. This speed is achievable with the high-speed on-chip oscillator (HOCO) or external crystal, and is validated across the full -40°C to +105°C temperature range specified for this part.
Does the R7FS3A6783A01CNF#AC0 support USB device and host modes?
Yes, the R7FS3A6783A01CNF#AC0 USB 2.0 Full-Speed Module (USBFS) supports both device and host modes per the Universal Serial Bus Specification 2.0. It includes an on-chip transceiver and LDO regulator, and complies with USB Battery Charging Specification 1.2 - enabling direct USB-C power negotiation and peripheral enumeration.
How many capacitive touch electrodes does the R7FS3A6783A01CNF#AC0 support?
The R7FS3A6783A01CNF#AC0 integrates a Capacitive Touch Sensing Unit (CTSU) supporting up to 10 electrodes, as confirmed in Table 1.14 of the datasheet for the 40-pin QFN variant. These are mapped to dedicated CTSU0–CTSU9 pins and operate independently of CPU load via hardware charge-transfer measurement.
What LCD segment drive capability does the R7FS3A6783A01CNF#AC0 provide?
The R7FS3A6783A01CNF#AC0 Segment LCD Controller (SLCDC) supports up to 34 segments × 8 commons or 38 segments × 4 commons. For the 40-pin QFN package, it delivers 34 segments and 8 commons - sufficient to drive alphanumeric displays and status indicators in compact industrial interfaces without external LCD drivers.
Is the R7FS3A6783A01CNF#AC0 qualified for automotive applications?
No, the R7FS3A6783A01CNF#AC0 is rated for industrial temperature range (-40°C to +105°C) and is not AEC-Q100 qualified. It targets industrial HMI, building automation, and consumer appliances - not automotive powertrain or ADAS systems. For automotive use, Renesas offers RA or RH850 families with full AEC-Q100 certification.
R7FS3A6783A01CNF#AC0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 40-WFQFN Exposed Pad
- Series:
- Renesas Synergy™ S3
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 48MHz
- Connectivity:
- CANbus, EBI/EMI, I2C, MMC/SD, QSPI, SCI, SPI, SSI, UART/USART, USB
- Peripherals:
- DMA, LCD, LVD, POR, PWM, WDT
- Number of I/O:
- 28
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 8K x 8
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.6V ~ 5.5V
- Data Converters:
- A/D 11x14b; D/A 3x8b, 3x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R7FS3A6783A01CNF#AC0 FAQ
1.How can I place an order for R7FS3A6783A01CNF#AC0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R7FS3A6783A01CNF#AC0 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 R7FS3A6783A01CNF#AC0 reliable?
The price and inventory of R7FS3A6783A01CNF#AC0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R7FS3A6783A01CNF#AC0 is usually 5 days.
3.What payment methods are accepted for R7FS3A6783A01CNF#AC0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R7FS3A6783A01CNF#AC0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R7FS3A6783A01CNF#AC0?
R7FS3A6783A01CNF#AC0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R7FS3A6783A01CNF#AC0 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 R7FS3A6783A01CNF#AC0?
For technical support, including R7FS3A6783A01CNF#AC0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R7FS3A6783A01CNF#AC0 requirements.
6.How does Aetrix verify that R7FS3A6783A01CNF#AC0 is sourced from the original manufacturer or authorized distributors?
All R7FS3A6783A01CNF#AC0 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 R7FS3A6783A01CNF#AC0 meets industry standards.
7.What is the process for return or replacement of R7FS3A6783A01CNF#AC0?
All R7FS3A6783A01CNF#AC0 units undergo pre-shipment inspection (PSI). If there is an issue with R7FS3A6783A01CNF#AC0, 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 R7FS3A6783A01CNF#AC0 part is unused and in its original packaging.
Return procedure for R7FS3A6783A01CNF#AC0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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