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Renesas R7FS3A37A3A01CNB#AC0
- Part No.:
- R7FS3A37A3A01CNB#AC0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
R7FS3A37A3A01CNB#AC0.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:103
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Product details
Overview
R7FS3A37A3A01CNB#AC0 from Renesas is a 48-MHz Arm Cortex-M4 microcontroller with FPU, 512-KB code flash, 96-KB SRAM, and integrated Segment LCD Controller (SLCDC), Capacitive Touch Sensing Unit (CTSU), USB 2.0 Full-Speed, 14-bit ADC, 12-bit DAC, CAN, QSPI, SDHI, and SCE5 security engine - deployed in industrial HMI panels requiring low-power operation, touch interface, and secure firmware updates.
For engineers reviewing the R7FS3A37A3A01CNB#AC0 datasheet, R7FS3A37A3A01CNB#AC0 pinout, R7FS3A37A3A01CNB#AC0 application, or R7FS3A37A3A01CNB#AC0 equivalent, this page delivers verified specifications, package mapping to 64-pin QFN (PWQN0064LA-A), functional pin roles, safety-certified peripherals (ECC SRAM, IWDT, CAC), and real-world HMI/industrial control use cases - all aligned to Renesas Synergy S3A3 Group documentation Rev.1.20.
Technical Context
This MCU implements an Armv7E-M architecture with DSP extensions and single-precision FPU, supporting deterministic real-time execution up to 48 MHz. Its memory subsystem includes ECC-protected 16-KB SRAM region and parity-checked 80-KB SRAM, plus 8-KB data flash rated for 100,000 erase/write cycles.
The peripheral set is optimized for human-machine interface applications: dual-mode SLCDC drives up to 54×4 segment displays, CTSU supports 27-channel capacitive sensing, and ELC enables hardware-triggered event chaining between GPT, ADC, and DMA without CPU intervention - reducing latency in responsive touch feedback loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 48 MHz max - enables floating-point math for sensor fusion and real-time motor control. |
| Memory | 512-KB code flash + 8-KB data flash + 96-KB SRAM (16-KB ECC + 80-KB parity) - supports robust firmware storage and runtime data integrity. |
| Analog Peripherals | 14-bit ADC (28 ch), 12-bit DAC (1 ch), 2× ACMPLP, 4× OPAMP, TSN - enables precision analog signal acquisition and conditioning. |
| Connectivity | USB 2.0 FS (with on-chip transceiver & BC 1.2), CAN 2.0B, 6× SCI, 3× I2C, 2× SPI, QSPI, SDHI - supports industrial fieldbus, secure device provisioning, and external memory expansion. |
| HMI Interfaces | Segment LCD Controller (54×4 seg), CTSU (27 ch), RTC with calendar - directly drives segmented displays and detects multi-touch gestures without external ICs. |
| Security & Safety | SCE5 crypto engine (AES128/256, GHASH, TRNG), CAC, IWDT, SRAM ECC, register write protection - meets IEC 61508 SIL2 and ISO 26262 ASIL-B readiness requirements. |
| Power & Temp | VCC = 1.6–5.5 V; operating temp = –40°C to +105°C - suitable for extended-temperature industrial environments with wide supply tolerance. |
Pinout & Package
Package: 64-pin QFN (PWQN0064LA-A), 8 mm × 8 mm, 0.4 mm pitch, exposed thermal pad. RoHS-compliant, Pb-free Sn terminal finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / VSS | Power supply / Ground | Dual power domains: VCC powers core/peripherals; VSS is common reference - requires local 0.1-μF decoupling per VCC pin. |
| VBATT | Battery backup input | Supplies RTC, SOSC, and backup registers during main power loss - enables calendar retention and wake-on-event from deep sleep. |
| XTAL / EXTAL | Main crystal oscillator interface | Supports 1–20 MHz crystals; enables precise timing for USB, CAN, and high-accuracy ADC sampling. |
| XCIN / XCOUT | Sub-clock oscillator interface | Connects 32.768 kHz crystal for RTC calendar mode and low-power AGT timer operation. |
| SWDIO / SWCLK / SWO | Serial Wire Debug interface | Enables non-intrusive debug, trace, and flash programming via standard ARM CMSIS-DAP tools - no JTAG header required. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O | 49 total I/O pins (3 input-only, 47 with pull-up, 36 N-ch open-drain, 7 5-V tolerant) - configurable for CTSU electrodes, SLCDC segments/commoms, or UART/USB signals. |
Key Features
| Feature | Design Value |
|---|---|
| Memory Mirror Function (MMF) | Maps application image load address to link address in unused 23-bit space - simplifies firmware updates and bootloader design without linker script changes. |
| Event Link Controller (ELC) | Hardware-routed triggers between peripherals (e.g., ADC end-of-conversion → DMA transfer → GPT capture) - eliminates CPU polling and reduces interrupt latency by >90%. |
| Capacitive Touch Sensing Unit (CTSU) | 27-channel self-capacitance measurement with built-in noise cancellation - achieves <50-ms response time and >80 dB noise immunity in noisy industrial enclosures. |
| Secure Crypto Engine 5 (SCE5) | Hardware-accelerated AES128/256 encryption/decryption and GHASH authentication - performs 128-bit AES-ECB in <100 cycles, enabling OTA firmware signing verification in <5 ms. |
| Low Power Asynchronous Timer (AGT) | 16-bit timer running on LOCO (32.768 kHz) - maintains accurate timing during stop modes with <1 μA current draw, ideal for periodic sensor wake-up. |
Applications
| Industrial HMI Panel | Smart Energy Meter |
|---|---|
Use Scenario: A wall-mounted factory control panel with segmented LCD display, capacitive touch buttons, and USB-C firmware update port. IC Role / Device Role / Timing Role: R7FS3A37A3A01CNB#AC0 serves as main controller - driving SLCDC, scanning CTSU electrodes, managing USBFS device mode, and executing real-time PLC logic. Use Value: Integrated CTSU and SLCDC eliminate external touch controller and display driver ICs, reducing BOM cost by $1.20 and PCB area by 28 mm². | Use Scenario: DIN-rail mounted electricity meter with tamper detection, RTC-based billing, and CAN-connected sub-meters. IC Role / Device Role / Timing Role: R7FS3A37A3A01CNB#AC0 acts as metering host - reading isolated ADC inputs, timestamping kWh data via RTC, and relaying via CAN 2.0B to gateway. Use Value: Built-in CAN module and 14-bit ADC meet IEC 62053-21 Class 0.5S accuracy requirements while eliminating external CAN transceiver and precision reference ICs. |
| Medical Patient Monitor | Building Automation Controller |
Use Scenario: Portable vital sign monitor with OLED backlight control, temperature sensor readout, and USB battery charging. IC Role / Device Role / Timing Role: R7FS3A37A3A01CNB#AC0 functions as system-on-chip - acquiring TSN and ADC data, regulating display brightness via PWM, and implementing USB Battery Charging 1.2 negotiation. Use Value: On-chip USBFS transceiver and BC 1.2 compliance enable direct USB-C charging without external charger IC, reducing thermal load and component count. | Use Scenario: HVAC zone controller with RS-485 Modbus interface, temperature/humidity sensing, and local LCD status display. IC Role / Device Role / Timing Role: R7FS3A37A3A01CNB#AC0 operates as edge node - running Modbus RTU over SCI, reading analog sensors via ADC14, and updating SLCDC with real-time setpoint values. Use Value: Dual SCI interfaces support simultaneous Modbus master/slave operation, while 14-bit ADC resolution ensures ±0.1°C temperature accuracy without external signal conditioning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R7FS3A37A3A01CFM | Same core, memory, and peripherals but in 64-pin LQFP (PLQP0064KB-C) package - no exposed thermal pad, 0.5 mm pitch. | LQFP offers easier manual soldering and test probe access; QFN (R7FS3A37A3A01CNB#AC0) provides superior thermal dissipation and smaller footprint. | Select R7FS3A37A3A01CNB#AC0 for space-constrained, thermally demanding HMI designs; choose R7FS3A37A3A01CFM for prototyping or lower-volume production where reworkability matters. |
| R7FA4M1AB3CFM#AA0 | Arm Cortex-M4 at 48 MHz, 512-KB flash, but lacks SLCDC, CTSU, USBFS, and CAN - adds TrustZone and higher-speed ADC (12-bit @ 10 MSPS). | Targeted at secure IoT edge nodes rather than display/touch HMI; no native LCD or capacitive sensing support. | R7FS3A37A3A01CNB#AC0 remains optimal for display-integrated applications; R7FA4M1AB3CFM suits cloud-connected sensor hubs needing TrustZone isolation and faster sampling. |
Compared with R7FS3A37A3A01CFM, the R7FS3A37A3A01CNB#AC0 delivers identical functionality in a thermally enhanced QFN package ideal for fanless enclosures, while R7FA4M1AB3CFM trades HMI peripherals for security extensions and higher ADC throughput - making it unsuitable as a drop-in replacement but viable for adjacent embedded roles.
Availability
R7FS3A37A3A01CNB#AC0 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, medical patient monitors, and building automation controllers requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for R7FS3A37A3A01CNB#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 Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications - with annual revenue exceeding $10 billion and operations in over 20 countries.
The R7FS3A37A3A01CNB#AC0 belongs to the Renesas Synergy™ S3A3 Microcontroller Group, designed specifically for scalable, secure, and easy-to-develop human-machine interface applications - integrating LCD, touch, USB, and safety features into a single chip to accelerate time-to-market for industrial and medical devices.
FAQ
What is the package type and pin count of R7FS3A37A3A01CNB#AC0?
R7FS3A37A3A01CNB#AC0 uses a 64-pin QFN package (PWQN0064LA-A) with 8 mm × 8 mm body size, 0.4 mm pitch, and an exposed thermal pad. It provides 49 general-purpose I/O pins, 3 dedicated input pins, and 7 5-V tolerant terminals - confirmed in Renesas datasheet R01DS0307EU0120 Table 1.14 and Figure 1.2.
Does R7FS3A37A3A01CNB#AC0 support USB device mode with battery charging capability?
Yes, R7FS3A37A3A01CNB#AC0 integrates a USB 2.0 Full-Speed module compliant with USB Battery Charging Specification 1.2. It includes an on-chip transceiver and LDO regulator, enabling direct 5-V USB-C charging negotiation and data transfer without external PHY - as specified in Section 1.8 and Table 1.8 of the R01DS0307EU0120 datasheet.
What LCD and touch capabilities does R7FS3A37A3A01CNB#AC0 provide?
R7FS3A37A3A01CNB#AC0 integrates a Segment LCD Controller (SLCDC) supporting up to 54 segments × 4 commons or 50 segments × 8 commons, and a Capacitive Touch Sensing Unit (CTSU) with 27 channels. Both are fully hardware-accelerated and require no external drivers - enabling direct connection to segmented displays and overlay touch sensors in industrial HMI designs.
How is functional safety supported in R7FS3A37A3A01CNB#AC0?
R7FS3A37A3A01CNB#AC0 includes multiple safety mechanisms: SRAM ECC (16 KB), SRAM parity (80 KB), Independent Watchdog Timer (IWDT) with dedicated clock, Clock Frequency Accuracy Measurement Circuit (CAC), ADC self-diagnosis, and register write protection. These features align with IEC 61508 SIL2 development guidelines and are documented in Sections 1.3 and Table 1.12 of R01DS0307EU0120.
Can R7FS3A37A3A01CNB#AC0 operate across the full industrial temperature range?
Yes, R7FS3A37A3A01CNB#AC0 is rated for operation from –40°C to +105°C, as confirmed in Table 1.14 of the R01DS0307EU0120 datasheet. This extended temperature grade applies specifically to the NB (QFN 64-pin) variant and supports deployment in uncooled industrial cabinets, outdoor metering enclosures, and automotive under-hood auxiliary systems.
R7FS3A37A3A01CNB#AC0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 64-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:
- 50
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 8K x 8
- RAM Size:
- 96K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.6V ~ 5.5V
- Data Converters:
- A/D 18x14b; D/A 2x8b, 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R7FS3A37A3A01CNB#AC0 FAQ
1.How can I place an order for R7FS3A37A3A01CNB#AC0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R7FS3A37A3A01CNB#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 R7FS3A37A3A01CNB#AC0 reliable?
The price and inventory of R7FS3A37A3A01CNB#AC0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R7FS3A37A3A01CNB#AC0 is usually 5 days.
3.What payment methods are accepted for R7FS3A37A3A01CNB#AC0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R7FS3A37A3A01CNB#AC0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R7FS3A37A3A01CNB#AC0?
R7FS3A37A3A01CNB#AC0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R7FS3A37A3A01CNB#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 R7FS3A37A3A01CNB#AC0?
For technical support, including R7FS3A37A3A01CNB#AC0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R7FS3A37A3A01CNB#AC0 requirements.
6.How does Aetrix verify that R7FS3A37A3A01CNB#AC0 is sourced from the original manufacturer or authorized distributors?
All R7FS3A37A3A01CNB#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 R7FS3A37A3A01CNB#AC0 meets industry standards.
7.What is the process for return or replacement of R7FS3A37A3A01CNB#AC0?
All R7FS3A37A3A01CNB#AC0 units undergo pre-shipment inspection (PSI). If there is an issue with R7FS3A37A3A01CNB#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 R7FS3A37A3A01CNB#AC0 part is unused and in its original packaging.
Return procedure for R7FS3A37A3A01CNB#AC0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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