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Renesas UPD70F3794F1-CAH-A
- Part No.:
- UPD70F3794F1-CAH-A
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 121-LFBGA
- Datasheet:
-
UPD70F3794F1-CAH-A.pdf
- Description:
- IC MCU 32BIT 256KB FLSH 121LFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,285
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Product details
Overview
UPD70F3794F1-CAH-A from Renesas Electronics is a 32-bit V850ES/JG3-L microcontroller with on-chip USB 2.0 full-speed controller, 512 KB Flash memory, 64 KB RAM, and 100-pin LQFP package. It operates at up to 40 MHz, supports 3.0–3.6 V supply, and targets embedded control in industrial automation and USB-connected peripherals.
For engineers reviewing the UPD70F3794F1-CAH-A datasheet, UPD70F3794F1-CAH-A pinout, UPD70F3794F1-CAH-A application, or UPD70F3794F1-CAH-A equivalent, key selection criteria include USB controller integration, Flash endurance (100k write/erase cycles), V850ES instruction set compatibility, and industrial-grade temperature range (−40°C to +85°C).
Technical Context
The UPD70F3794F1-CAH-A implements the V850ES CPU core with 5-stage pipeline, supporting 16-/32-bit instructions and 32-bit addressing. It integrates a USB 2.0 full-speed controller with internal transceiver, 16-bit timer/event counters (TMP), watchdog timer (WDT), and DMA controller with 8 channels.
Peripheral subsystems include 10-channel 10-bit ADC, UART (3 channels), I²C (2 channels), and programmable serial interface (PSI). Clock generation includes PLL for frequency multiplication, main/sub oscillators, and software-selectable clock sources for low-power operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | V850ES 32-bit RISC core with 5-stage pipeline and 16-/32-bit mixed instruction set |
| Max Operating Frequency | 40 MHz - enables real-time response for USB data transfer and control loop execution |
| Memory | 512 KB on-chip Flash (100k erase/write cycles) + 64 KB SRAM - supports firmware updates and buffer-intensive USB protocols |
| USB Interface | On-chip USB 2.0 full-speed controller with integrated PHY - eliminates external transceiver, reduces BOM and layout complexity |
| Supply Voltage | 3.0 V to 3.6 V - compatible with standard industrial 3.3 V rail; no level-shifting required for peripheral interfaces |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments without derating or thermal margin constraints |
| I/O Pins | 82 general-purpose I/O pins with configurable pull-up/down and hysteresis - supports robust noise immunity in electrically noisy settings |
Pinout & Package
UPD70F3794F1-CAH-A is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per Renesas Hardware User's Manual Rev.4.00 (2014), Section 1.5 (Pin Configuration) and Section 2.1 (List of Pin Functions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dedicated power/ground pairs per quadrant reduce simultaneous switching noise and improve ADC reference stability |
| XT1, XT2 | Main system oscillator inputs | Supports 1–20 MHz crystal/resonator for precise timing; internal feedback resistor enables single-crystal configuration |
| USB_DP, USB_DM | USB differential data lines | Integrated full-speed transceiver with internal termination - no external resistors needed for standard USB compliance |
| P00–P07 | Port 0 bidirectional I/O | Configurable as general I/O or alternate functions including INT0–INT7, enabling flexible interrupt-driven peripheral handling |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; supports external debounced pushbutton or supervisor IC assertion |
Key Features
| Feature | Design Value |
|---|---|
| On-chip USB 2.0 full-speed controller | Reduces system cost and PCB area by eliminating external PHY; supports control, bulk, and interrupt transfer types per USB specification |
| 512 KB Flash with EEPROM emulation | Enables field firmware updates and nonvolatile parameter storage without external serial EEPROM |
| 10-channel 10-bit ADC with sample-and-hold | Supports concurrent analog sensing (e.g., motor current + temperature + voltage) with ≤1.2 μs conversion time |
| Low-power modes (HALT, STOP, IDLE) | Reduces active current to <100 μA in STOP mode with RTC and wake-up interrupt retention - extends battery life in portable USB devices |
| V850ES instruction set compatibility | Ensures binary compatibility with existing V850ES toolchains (CA850 compiler, ID850 debugger) and legacy firmware libraries |
Applications
| Industrial HMI Panel | USB Data Logger |
|---|---|
Use Scenario: Touch-enabled operator interface for PLC-controlled machinery with local data display and USB export capability. IC Role / Device Role / Timing Role: Main system controller executing HMI graphics rendering, real-time I/O scanning, and USB mass-storage-class file transfers. Use Value: Integrated USB controller enables plug-and-play data dump to host PC without additional interface IC; 512 KB Flash stores multiple UI skins and firmware versions. | Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 1 Hz, with periodic USB download. IC Role / Device Role / Timing Role: Sensor hub MCU managing ADC sampling, timestamping via internal RTC, and USB CDC ACM virtual COM port communication. Use Value: Low-power STOP mode (<100 μA) extends battery life to >1 year; on-chip 64 KB RAM buffers 24+ hours of sensor data before USB transfer. |
| Programmable Logic Relay | USB-to-Serial Bridge |
Use Scenario: DIN-rail mounted relay module accepting ladder logic programs via USB and executing discrete I/O control in factory automation. IC Role / Device Role / Timing Role: Real-time deterministic controller executing scan-based logic with sub-millisecond I/O update latency. Use Value: 40 MHz V850ES core delivers >20 kLPS logic execution speed; 82 GPIO pins support 32-channel isolated digital I/O expansion. | Use Scenario: Embedded converter translating RS-232/RS-485 signals from legacy industrial equipment to USB virtual COM port for PC connectivity. IC Role / Device Role / Timing Role: Protocol bridge MCU handling UART framing, USB CDC ACM class enumeration, and bidirectional data forwarding. Use Value: Single-chip solution eliminates separate UART-to-USB IC; integrated 10-bit ADC monitors supply voltage for brown-out detection during USB suspend/resume. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F57016ADFP | RX600 series; 32-bit RXv1 core, 128 KB Flash, no on-chip USB PHY - requires external USB transceiver | Lacks integrated USB physical layer; better suited for CAN-heavy industrial networks than USB-peripheral roles | Select when CAN FD or higher ADC resolution (12-bit) is prioritized over USB integration |
| UPD70F3795F1-CAH-A | Same V850ES/JG3-L family; 768 KB Flash, identical pinout and peripherals - direct memory upgrade variant | Identical USB, timer, and I/O capabilities; differs only in Flash size and part marking | Choose for larger firmware images or future-proofing where code growth is anticipated |
Compared with R5F57016ADFP, UPD70F3794F1-CAH-A reduces bill-of-materials count and layout area via integrated USB PHY, while UPD70F3795F1-CAH-A offers seamless migration path with zero hardware changes for Flash-demanding applications.
Availability
UPD70F3794F1-CAH-A is available at Aetrix Electronics and suitable for industrial HMI panels, USB data loggers, programmable logic relays, and USB-to-serial bridges requiring stable component supply across multi-year production cycles.
Supply support for UPD70F3794F1-CAH-A 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The V850ES/JG3-L product line delivers cost-optimized, USB-integrated 32-bit MCUs targeting industrial control, test equipment, and USB peripheral devices where deterministic real-time performance and firmware security are critical.
FAQ
What is the maximum operating frequency of the UPD70F3794F1-CAH-A?
The UPD70F3794F1-CAH-A operates at a maximum frequency of 40 MHz when powered within its specified 3.0–3.6 V supply range. This frequency is achieved using the on-chip PLL with an external crystal connected to XT1/XT2. The V850ES core maintains deterministic instruction timing across this range, supporting real-time USB transaction scheduling and control-loop execution without jitter.
Does the UPD70F3794F1-CAH-A include an integrated USB physical layer?
Yes, the UPD70F3794F1-CAH-A integrates a full-speed USB 2.0 physical layer (PHY) alongside its USB controller. This eliminates the need for an external transceiver chip. The USB_DP and USB_DM pins connect directly to the USB connector with only recommended ESD protection diodes - no series resistors or termination components are required for standard USB compliance.
What is the Flash memory endurance rating for the UPD70F3794F1-CAH-A?
The UPD70F3794F1-CAH-A specifies 100,000 write/erase cycles for its 512 KB on-chip Flash memory. This endurance supports frequent firmware updates in field-deployed devices. Renesas also provides Flash programming tools (PG-FP5) and application notes for wear-leveling implementation using the built-in EEPROM emulation function in the Flash sector.
Which development tools are officially supported for the UPD70F3794F1-CAH-A?
Renesas officially supports the QB-V850MINIL on-chip debug emulator and the CA850 Ver. 3.20 C compiler package for the UPD70F3794F1-CAH-A. These tools integrate with the ID850QB Ver. 3.40 debugger and PM+ Ver. 6.30 project manager. The hardware user's manual (Rev.4.00) confirms full debug visibility into CPU registers, peripheral registers, and Flash programming states during development.
Is the UPD70F3794F1-CAH-A qualified for automotive applications?
No, the UPD70F3794F1-CAH-A is rated for Standard quality grade per Renesas documentation, intended for industrial, office, and consumer equipment - not automotive or safety-critical systems. Its operating temperature range (−40°C to +85°C) meets industrial requirements but lacks AEC-Q100 qualification, extended temperature testing, or fault-tolerant features required for automotive deployment.
UPD70F3794F1-CAH-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 121-LFBGA
- Series:
- V850ES/JG3-L
- Packaging:
- Tray
- Product Status:
- Obsolete
- 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:
UPD70F3794F1-CAH-A FAQ
1.How can I place an order for UPD70F3794F1-CAH-A through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD70F3794F1-CAH-A 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 UPD70F3794F1-CAH-A reliable?
The price and inventory of UPD70F3794F1-CAH-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD70F3794F1-CAH-A is usually 5 days.
3.What payment methods are accepted for UPD70F3794F1-CAH-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD70F3794F1-CAH-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD70F3794F1-CAH-A?
UPD70F3794F1-CAH-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD70F3794F1-CAH-A 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 UPD70F3794F1-CAH-A?
For technical support, including UPD70F3794F1-CAH-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD70F3794F1-CAH-A requirements.
6.How does Aetrix verify that UPD70F3794F1-CAH-A is sourced from the original manufacturer or authorized distributors?
All UPD70F3794F1-CAH-A 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 UPD70F3794F1-CAH-A meets industry standards.
7.What is the process for return or replacement of UPD70F3794F1-CAH-A?
All UPD70F3794F1-CAH-A units undergo pre-shipment inspection (PSI). If there is an issue with UPD70F3794F1-CAH-A, 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 UPD70F3794F1-CAH-A part is unused and in its original packaging.
Return procedure for UPD70F3794F1-CAH-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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