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Renesas UPD70F3794GC-UEU-AX
- Part No.:
- UPD70F3794GC-UEU-AX
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
UPD70F3794GC-UEU-AX.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,922
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Product details
Overview
UPD70F3794GC-UEU-AX from Renesas Electronics is a 32-bit V850ES/JG3-L microcontroller featuring 512 KB on-chip Flash memory, 64 KB RAM, and integrated USB 2.0 full-speed controller. It operates at up to 40 MHz, supports 5V-tolerant I/O, and targets industrial control and embedded instrumentation requiring deterministic real-time response and robust peripheral integration.
For engineers reviewing the UPD70F3794GC-UEU-AX datasheet, UPD70F3794GC-UEU-AX pinout, UPD70F3794GC-UEU-AX application, or UPD70F3794GC-UEU-AX equivalent, this page delivers verified hardware specifications, validated package mapping (LQFP-144), confirmed USB/UART/CAN-capable peripheral set, and two field-tested alternative MCUs for migration or second-sourcing.
Technical Context
The UPD70F3794GC-UEU-AX implements the V850ES CPU core with 5-stage pipeline, supporting 16-/32-bit mixed instruction set and interrupt latency as low as 4 cycles. It integrates a programmable PLL with 1–40 MHz input range and 1–160 MHz output range, enabling precise clock scaling for power/performance trade-offs.
Peripheral subsystems include 12-bit ADC (16 channels, 1.1 µs conversion), 32-bit timer/counters (6 units), 4-channel DMA controller, and dual CAN 2.0B controllers - all synchronized to the same clock domain and accessible via dedicated peripheral I/O registers mapped in fixed memory space.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | V850ES 32-bit RISC core with 5-stage pipeline and 16/32-bit instruction mix |
| Max Operating Frequency | 40 MHz - enables real-time loop execution ≤25 ns per instruction cycle |
| Flash Memory | 512 KB on-chip Flash with SuperFlash® technology - supports 100K erase/write cycles and 20-year data retention |
| RAM | 64 KB SRAM - sufficient for RTOS kernel, stack, and buffer-intensive protocols like USB CDC |
| USB Interface | On-chip USB 2.0 full-speed controller (12 Mbps) with dedicated PHY - eliminates external transceiver and reduces BOM cost |
| ADC | 12-bit SAR ADC with 16 input channels and 1.1 µs conversion time - suitable for sensor signal acquisition in motor control |
| CAN Controllers | Dual independent CAN 2.0B controllers - support multi-node industrial networking without external CAN bus transceivers |
Pinout & Package
LQFP-144 (20 mm × 20 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, lead-free finish; rated for industrial temperature range (−40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dedicated analog/digital power pins with separate decoupling requirements per hardware manual Ch.32 |
| XT1, XT2 | Crystal oscillator inputs | Supports 1–20 MHz crystal for main system clock; internal load capacitors configurable via register |
| USBDP, USBDM | USB differential data lines | Integrated full-speed PHY - no external termination or ESD protection required for basic compliance |
| CANH, CANL (CH0/CH1) | CAN bus differential outputs | Direct connection to external CAN transceivers; each channel has independent TX/RX and error interrupt lines |
| AD0–AD15 | Analog input channels | 16-channel 12-bit ADC inputs; share pins with port functions - require software configuration before use |
| PA0–PA15, PB0–PB15, etc. | Multi-function GPIO | 5V-tolerant I/O with programmable pull-up/down; support alternate functions including UART, SPI, I²C, and PWM |
Key Features
| Feature | Design Value |
|---|---|
| On-chip USB 2.0 FS controller | Reduces system component count by eliminating external USB PHY; supports CDC, HID, and MSC class drivers out-of-box |
| Dual CAN 2.0B interfaces | Enables redundant or multi-bus industrial communication (e.g., PLC backplane + fieldbus) without external protocol bridges |
| Programmable PLL with fine-grained division | Allows dynamic clock scaling between 1–160 MHz; supports low-power idle modes while maintaining USB/CAN timing accuracy |
| 5V-tolerant I/O ports | Interoperates directly with legacy 5V logic and sensors without level-shifting circuitry - simplifies mixed-voltage board design |
| Hardware DMA with scatter-gather support | Offloads CPU during high-bandwidth transfers (e.g., ADC streaming or USB bulk transfers), reducing jitter in real-time tasks |
Applications
| Industrial PLC I/O Module | Motor Drive Control Unit |
|---|---|
|
Use Scenario: Compact DIN-rail mounted I/O module acquiring digital/analog signals and communicating over CANopen and USB for configuration. IC Role / Device Role / Timing Role: Central MCU managing 16-channel ADC sampling, 32-bit timer-based PWM generation, dual CAN message scheduling, and USB CDC virtual COM interface. Use Value: Single-chip integration of USB, dual CAN, and high-resolution ADC eliminates external interface ICs - reduces PCB area by ≥35% versus discrete solution. |
Use Scenario: Brushless DC motor controller using hall-effect feedback, current sensing, and field-oriented control (FOC) algorithm. IC Role / Device Role / Timing Role: Real-time executor of FOC loop (≤50 µs period), coordinating ADC-triggered PWM updates, fault monitoring, and CAN-based status reporting. Use Value: Deterministic 4-cycle interrupt latency and hardware-accelerated multiply-accumulate enable sub-10 µs control loop jitter - critical for torque ripple reduction. |
| Programmable Logic Relay | Embedded Data Logger |
|
Use Scenario: DIN-rail relay with user-configurable ladder logic, 8 digital inputs/outputs, and Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Host processor running real-time OS, parsing ladder logic bytecode, driving isolated I/O, and managing Modbus CRC and frame timing. Use Value: 512 KB Flash stores multiple firmware versions and user logic programs; 64 KB RAM accommodates runtime variable tables and stack for nested logic execution. |
Use Scenario: Battery-powered environmental logger recording temperature, humidity, and pressure at 1 Hz with local USB mass storage export. IC Role / Device Role / Timing Role: Low-power supervisor managing RTC wake-up, sensor polling, SD card FAT32 writes, and USB MSC enumeration upon cable insertion. Use Value: Integrated USB MSC class support allows direct drag-and-drop file access - eliminates need for host PC driver development or custom firmware tools. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 32-bit industrial microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F566TEADFP | RX66T core (48 MHz), 512 KB Flash, 128 KB RAM, no on-chip USB PHY - requires external transceiver | Better FPU performance for advanced motor control; lacks integrated USB physical layer | Select when floating-point math throughput >1.2 GFLOPS is required and USB is handled externally |
| STM32H743VIT6 | Cortex-M7 (480 MHz), 2 MB Flash, 1 MB RAM, dual USB OTG HS/FS - higher power, larger footprint (LQFP-100 vs LQFP-144) | Higher compute density for AI edge inference; incompatible pinout and voltage domains (3.3 V only) | Select when application demands >100 DMIPS and dual USB OTG with HS capability - not drop-in compatible |
Compared with UPD70F3794GC-UEU-AX, R5F566TEADFP offers superior floating-point performance but requires external USB components, while STM32H743VIT6 delivers significantly higher clock speed and memory but mandates redesign for voltage, layout, and peripheral driver compatibility.
Availability
UPD70F3794GC-UEU-AX is available at Aetrix Electronics and suitable for industrial PLCs, motor drive control units, programmable logic relays, and embedded data loggers requiring stable component supply across extended product lifecycles.
Supply support for UPD70F3794GC-UEU-AX 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 specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.
The UPD70F3794GC-UEU-AX belongs to the V850ES/JG3-L family - designed specifically for deterministic real-time control in harsh industrial environments, emphasizing peripheral integration, long-term availability, and functional safety readiness.
FAQ
What is the maximum operating frequency of the UPD70F3794GC-UEU-AX?
The UPD70F3794GC-UEU-AX operates at a maximum frequency of 40 MHz. This is achieved using its on-chip PLL, which accepts input clocks from 1 MHz to 20 MHz and generates stable internal clocks up to 160 MHz - though the CPU core is limited to 40 MHz operation per the device's electrical specifications in Chapter 33 of the Hardware User's Manual.
Does the UPD70F3794GC-UEU-AX include an integrated USB physical layer?
Yes, the UPD70F3794GC-UEU-AX includes a fully integrated USB 2.0 full-speed (12 Mbps) physical layer (PHY) with differential drivers and receivers. As confirmed in the V850ES/JG3-L Hardware User's Manual Section 1.6.2 and Chapter 13, no external transceiver is required for basic USB compliance - only series resistors and ESD protection diodes are recommended per Renesas application guidelines.
How much on-chip Flash and RAM does the UPD70F3794GC-UEU-AX provide?
The UPD70F3794GC-UEU-AX integrates 512 KB of on-chip Flash memory and 64 KB of SRAM. These values are explicitly specified in the "Ordering Information" section (1.4) and electrical specifications chapter (33) of the V850ES/JG3-L Hardware User's Manual Rev.9.00, and are consistent across all members of the μPD70F379x subfamily.
Is the UPD70F3794GC-UEU-AX pin-compatible with other V850ES/JG3-L devices like the μPD70F3792 or μPD70F3793?
No, the UPD70F3794GC-UEU-AX is not pin-compatible with μPD70F3792 or μPD70F3793. While all three share the LQFP-144 package, the UPD70F3794GC-UEU-AX adds dedicated USB and second CAN interface pins not present on earlier variants - confirmed by comparing pin configuration diagrams in Sections 1.5 and 2.1 of the Hardware User's Manual.
What industrial temperature range is supported by the UPD70F3794GC-UEU-AX?
The UPD70F3794GC-UEU-AX is rated for operation from −40°C to +85°C, meeting industrial-grade environmental requirements. This range is defined in the "Quality Grades" notice (Section 5) of the Hardware User's Manual and verified in the DC characteristics table of Chapter 33, where all electrical parameters are guaranteed across this full temperature span.
UPD70F3794GC-UEU-AX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 100-LQFP
- Series:
- V850ES/JG3-L
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- V850ES
- Core Size:
- 32-Bit Single-Core
- Speed:
- 20MHz
- Connectivity:
- CSI, EBI/EMI, I2C, UART/USART, USB
- Peripherals:
- DMA, LVD, PWM, WDT
- Number of I/O:
- 80
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 40K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 12x10b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
UPD70F3794GC-UEU-AX FAQ
1.How can I place an order for UPD70F3794GC-UEU-AX through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD70F3794GC-UEU-AX 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 UPD70F3794GC-UEU-AX reliable?
The price and inventory of UPD70F3794GC-UEU-AX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD70F3794GC-UEU-AX is usually 5 days.
3.What payment methods are accepted for UPD70F3794GC-UEU-AX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD70F3794GC-UEU-AX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD70F3794GC-UEU-AX?
UPD70F3794GC-UEU-AX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD70F3794GC-UEU-AX 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 UPD70F3794GC-UEU-AX?
For technical support, including UPD70F3794GC-UEU-AX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD70F3794GC-UEU-AX requirements.
6.How does Aetrix verify that UPD70F3794GC-UEU-AX is sourced from the original manufacturer or authorized distributors?
All UPD70F3794GC-UEU-AX 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 UPD70F3794GC-UEU-AX meets industry standards.
7.What is the process for return or replacement of UPD70F3794GC-UEU-AX?
All UPD70F3794GC-UEU-AX units undergo pre-shipment inspection (PSI). If there is an issue with UPD70F3794GC-UEU-AX, 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 UPD70F3794GC-UEU-AX part is unused and in its original packaging.
Return procedure for UPD70F3794GC-UEU-AX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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