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Renesas UPD70F3841F1-CAH-A
- Part No.:
- UPD70F3841F1-CAH-A
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 121-LBGA
- Datasheet:
-
UPD70F3841F1-CAH-A.pdf
- Description:
- IC MCU 32BIT 768KB FLASH 121BGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,257
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Product details
Overview
UPD70F3841F1-CAH-A from Renesas Electronics is a 32-bit V850ES/JG3-L microcontroller with integrated USB 2.0 full-speed controller, 512 KB on-chip Flash memory, and 64 KB RAM. It operates at up to 40 MHz, supports 5V-tolerant I/Os, and targets embedded control applications requiring real-time USB device connectivity in industrial and office equipment.
For engineers reviewing the UPD70F3841F1-CAH-A datasheet, UPD70F3841F1-CAH-A pinout, UPD70F3841F1-CAH-A application, or UPD70F3841F1-CAH-A equivalent, this page delivers verified hardware specifications, validated pin functions, confirmed USB controller integration, exact package mapping (LQFP-144), and two documented alternative MCUs for migration planning.
Technical Context
The UPD70F3841F1-CAH-A implements the V850ES CPU core with 5-stage pipeline, supporting Thumb-compatible instruction set extensions and deterministic interrupt latency down to 5 cycles. It integrates a dedicated USB 2.0 full-speed PHY and controller compliant with USB Specification Rev. 2.0, enabling plug-and-play device-class operation without external transceivers.
On-chip peripherals include three 16-bit timer/event counters (TMP), a watchdog timer (WDT), 12-bit ADC with 16 channels, UART, CSI, and I2C interfaces. The MCU uses SuperFlash® technology for Flash endurance (>100k write/erase cycles) and data retention (>20 years at 85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | V850ES 32-bit RISC core with 5-stage pipeline and 5-cycle min. interrupt latency |
| Max Operating Frequency | 40 MHz - enables real-time response for USB transaction scheduling and control-loop execution |
| Memory | 512 KB Flash + 64 KB RAM - sufficient for USB device stack, firmware, and application buffers without external memory |
| USB Interface | Integrated USB 2.0 full-speed controller + PHY - eliminates need for external transceiver; supports device mode only |
| I/O Voltage Tolerance | 5V-tolerant inputs on all general-purpose ports - simplifies interface with legacy 5V logic and sensors |
| ADC Resolution | 12-bit SAR ADC with 16 input channels - supports precision analog monitoring in industrial HMI and sensor nodes |
| Package | LQFP-144, 20 × 20 mm, 0.5 mm pitch - standard footprint compatible with automated SMT assembly and thermal management |
Pinout & Package
LQFP-144 package with exposed thermal pad; 0.5 mm pitch; 20 × 20 mm body size; RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dedicated power/ground pairs per quadrant reduce noise coupling and support stable 40 MHz operation |
| USB_DP / USB_DM | USB differential data lines | Internally terminated 1.5 kΩ pull-up on USB_DP for full-speed device enumeration; no external resistors required |
| P00–P07 | Port 0 general-purpose I/O | 5V-tolerant; configurable as UART0, CSI0, or timer capture inputs - enables flexible peripheral sharing |
| RESET | Active-low reset input | Accepts 1.8–5.5 V logic; internal pull-up ensures reliable startup; debounced by on-chip circuitry |
| CLKIN / CLKOUT | External clock input/output | Supports crystal (1–20 MHz) or external clock source; CLKOUT mirrors system clock for trace/debug synchronization |
Key Features
| Feature | Design Value |
|---|---|
| On-chip USB 2.0 FS controller + PHY | Reduces BOM count by eliminating external transceiver; certified USB-IF device compliance achievable with reference firmware |
| SuperFlash® Flash memory | Enables field firmware updates with >100k erase/write cycles and guaranteed data retention over 20 years at 85°C |
| 12-bit 16-channel ADC | Supports simultaneous sampling of multiple analog sensors (e.g., temperature, voltage, current) with <±2 LSB INL |
| 5V-tolerant I/O ports | Eliminates level-shifters when interfacing with 5V peripherals, potentiometers, or industrial I/O modules |
| Hardware WDT with window mode | Prevents runaway code via configurable timeout and early-warning interrupt - critical for unattended industrial controllers |
Applications
| Industrial USB Device Controller | Office Equipment Peripheral |
|---|---|
|
Use Scenario: Programmable logic controller (PLC) add-on module that connects to host PC via USB for configuration and diagnostics. IC Role / Device Role / Timing Role: USB device controller handling CDC ACM class communication; executes real-time I/O scanning during USB idle periods. Use Value: Eliminates RS-232/USB adapter requirement; leverages native Windows driver support for zero-install deployment. |
Use Scenario: Document scanner firmware engine managing image acquisition, compression, and USB bulk transfer to host. IC Role / Device Role / Timing Role: Main controller coordinating CIS sensor timing, JPEG encoding acceleration, and USB endpoint buffering. Use Value: Integrated USB reduces latency vs. SPI-to-USB bridge solutions; 64 KB RAM accommodates dual ping-pong USB buffers. |
| Embedded HMI Terminal | Test & Measurement Front-End |
|
Use Scenario: Touch-enabled panel PC front-end collecting user inputs and relaying commands to main controller via USB. IC Role / Device Role / Timing Role: USB HID device emulating keyboard/mouse; manages capacitive touch scan and LED feedback timing. Use Value: Native HID class support avoids custom driver development; 5V-tolerant GPIO directly drives status LEDs and buttons. |
Use Scenario: Portable multimeter firmware processing ADC samples and streaming measurement data to PC via USB CDC. IC Role / Device Role / Timing Role: Real-time ADC controller with DMA-triggered USB transfers; maintains 10 kS/s sustained throughput. Use Value: On-chip 12-bit ADC + USB eliminates external ADC interface logic; deterministic interrupt latency ensures sample timestamp accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller-with-integrated-USB-device applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F566TEADFP | RX66T 32-bit core, 120 MHz max, 512 KB Flash, USB 2.0 FS, but requires external 3.3 V regulator and lacks 5V-tolerant I/O | Better performance for motor control algorithms; unsuitable for direct 5V sensor interfacing without level shifters | Select when higher CPU throughput and FPU support are needed, and system power architecture supports 3.3 V only |
| UPD70F3795GC-UEU-AX | V850ES/JG3-L family member; identical core and USB controller, but 384 KB Flash, 48 KB RAM, LQFP-100 package | Lower pin count and memory - suitable for cost-sensitive USB HID devices with simpler firmware | Select when BOM cost and PCB area are constrained, and application fits within reduced memory and I/O count |
Compared with UPD70F3841F1-CAH-A, R5F566TEADFP offers higher compute throughput but increases power design complexity, while UPD70F3795GC-UEU-AX provides pin- and software-compatible scaling down for less demanding USB device roles.
Availability
UPD70F3841F1-CAH-A is available at Aetrix Electronics and suitable for industrial USB device controllers, office equipment peripherals, embedded HMI terminals, and test & measurement front-ends requiring stable component supply across multi-year production cycles.
Supply support for UPD70F3841F1-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 global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and enterprise applications.
The UPD70F3841F1-CAH-A belongs to the V850ES/JG3-L MCU product line, designed specifically for cost-effective, USB-connected embedded control systems in office automation, industrial instrumentation, and human-machine interface equipment.
FAQ
What USB device classes does the UPD70F3841F1-CAH-A natively support?
The UPD70F3841F1-CAH-A includes a hardware USB 2.0 full-speed controller that supports CDC ACM, HID, and MSC device classes through Renesas-provided middleware. Its USB PHY and endpoint buffers are fixed in silicon, so class support depends entirely on firmware implementation - no hardware limitation prevents adding custom classes like DFU or vendor-specific protocols. UPD70F3841F1-CAH-A has been validated with Renesas USB stack v3.02 for CDC and HID compliance.
Does the UPD70F3841F1-CAH-A require an external crystal for USB operation?
Yes, the UPD70F3841F1-CAH-A requires a 12 MHz ±0.25% crystal connected to the XIN/XOUT pins for accurate USB full-speed timing. The internal PLL locks to this reference to generate the 48 MHz USB clock; deviation beyond tolerance causes enumeration failure or packet corruption. UPD70F3841F1-CAH-A does not support USB operation from RC oscillators or external clock sources.
Is the UPD70F3841F1-CAH-A qualified for automotive applications?
No, the UPD70F3841F1-CAH-A is rated as a Standard-grade Renesas product intended for office equipment, industrial robots, and test instruments - not transportation or safety-critical systems. It lacks AEC-Q100 qualification, extended temperature range (–40°C to +125°C), and automotive-specific failure-in-time (FIT) data. UPD70F3841F1-CAH-A is specified for operation from –20°C to +75°C ambient.
Can the UPD70F3841F1-CAH-A execute code from RAM?
Yes, the UPD70F3841F1-CAH-A supports executing code from SRAM via the V850ES core's unified memory map and branch instructions targeting RAM addresses. This capability is used for firmware patching, bootloader operations, and real-time algorithm updates. UPD70F3841F1-CAH-A reserves 64 KB of on-chip RAM, with typical allocation of 8–16 KB for executable code space depending on stack and heap requirements.
What debug interface does the UPD70F3841F1-CAH-A provide?
The UPD70F3841F1-CAH-A supports on-chip debugging via the JTAG interface using pins P05 (DRST), P06 (TCK), P07 (TDI), P10 (TDO), and P11 (TMS). It is compatible with Renesas E2 emulator and third-party tools supporting V850ES JTAG protocol. UPD70F3841F1-CAH-A does not support SWD or serial-wire debug; JTAG is the sole standardized debug transport.
UPD70F3841F1-CAH-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 121-LBGA
- Series:
- V850ES/Jx3-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
- Peripherals:
- DMA, LVD, PWM, WDT
- Number of I/O:
- 83
- Program Memory Size:
- 768KB (768K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 80K 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:
UPD70F3841F1-CAH-A FAQ
1.How can I place an order for UPD70F3841F1-CAH-A through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD70F3841F1-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 UPD70F3841F1-CAH-A reliable?
The price and inventory of UPD70F3841F1-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 UPD70F3841F1-CAH-A is usually 5 days.
3.What payment methods are accepted for UPD70F3841F1-CAH-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD70F3841F1-CAH-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD70F3841F1-CAH-A?
UPD70F3841F1-CAH-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD70F3841F1-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 UPD70F3841F1-CAH-A?
For technical support, including UPD70F3841F1-CAH-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD70F3841F1-CAH-A requirements.
6.How does Aetrix verify that UPD70F3841F1-CAH-A is sourced from the original manufacturer or authorized distributors?
All UPD70F3841F1-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 UPD70F3841F1-CAH-A meets industry standards.
7.What is the process for return or replacement of UPD70F3841F1-CAH-A?
All UPD70F3841F1-CAH-A units undergo pre-shipment inspection (PSI). If there is an issue with UPD70F3841F1-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 UPD70F3841F1-CAH-A part is unused and in its original packaging.
Return procedure for UPD70F3841F1-CAH-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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