Renesas UPD70F3766GF-GAT-AX

Overview

UPD70F3766GF-GAT-AX from Renesas Electronics is a 32-bit V850ES/JG3-H microcontroller with 512 KB on-chip Flash, 48 KB RAM, and integrated CAN 2.0B controller, operating at up to 40 MHz in industrial temperature range (−40°C to +85°C). It targets real-time control in motor drives, industrial I/O modules, and building automation systems requiring deterministic interrupt response and low-power operation.

For engineers reviewing the UPD70F3766GF-GAT-AX datasheet, UPD70F3766GF-GAT-AX pinout, UPD70F3766GF-GAT-AX application, or UPD70F3766GF-GAT-AX equivalent, key selection criteria include its V850ES core instruction compatibility, 100-pin LQFP package with dedicated CAN transceiver interface pins, Flash programming via on-chip debug, and support for single-cycle interrupt latency down to 1.5 µs.

Technical Context

The UPD70F3766GF-GAT-AX implements the V850ES RISC CPU core with 3-stage pipeline, supporting 16-/32-bit instructions and 32-bit addressing. It integrates a programmable PLL for clock generation, dual 16-bit timer/event counters (TAA/TAB), and a 12-bit ADC with 16 channels and hardware-triggered sampling.

Its peripheral set includes a full-CAN 2.0B controller with 32 message objects, 8-channel DMA, UART with LIN support, and a watchdog timer with windowed mode. Memory protection unit (MPU) enforces memory access rights across four regions, supporting safe partitioning of application and bootloader code.

Key Specifications

Pinout & Package

UPD70F3766GF-GAT-AX is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignment follows Renesas' standard V850ES/JG3-H layout, including dedicated CANH/CANL differential pair, 16-bit address/data multiplexed bus pins, and configurable I/O ports with hysteresis and pull-up/down options.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit industrial microcontroller applications.

Compared with UPD70F3766GF-GAT-AX, R5F571MLDDFP delivers higher compute throughput but increases BOM complexity and power budget, while UPD70F3765GF-GAT-AX offers identical functionality at lower density-making it suitable for cost-optimized variants where firmware growth is constrained.

Availability

UPD70F3766GF-GAT-AX is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, and PLC I/O modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for UPD70F3766GF-GAT-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.

The V850ES/JG3-H product line delivers deterministic real-time performance and functional safety readiness for industrial automation, targeting applications demanding sub-microsecond interrupt response and certified reliability under harsh EMI conditions.

FAQ

What is the maximum operating frequency of the UPD70F3766GF-GAT-AX?

The UPD70F3766GF-GAT-AX operates at a maximum system clock frequency of 40 MHz, achieved using its on-chip PLL with external crystal input (1–20 MHz range). This frequency supports real-time control loops with worst-case execution times under 25 µs, validated across the full industrial temperature range (−40°C to +85°C). The UPD70F3766GF-GAT-AX maintains timing compliance without derating at rated VDD = 3.0–3.6 V.

Does the UPD70F3766GF-GAT-AX include an integrated CAN transceiver?

No, the UPD70F3766GF-GAT-AX integrates a CAN 2.0B protocol controller but requires an external CAN transceiver (e.g., TJA1042 or SN65HVD230) connected to its CANH and CANL pins. Its CAN controller supports 32 message objects, automatic retransmission, and error confinement - all managed in hardware without CPU intervention. This separation ensures signal integrity and EMC robustness in industrial environments.

How much on-chip Flash and RAM does the UPD70F3766GF-GAT-AX provide?

The UPD70F3766GF-GAT-AX includes 512 KB of on-chip Flash memory and 48 KB of SRAM. The Flash supports dual-bank operation for zero-downtime firmware updates, while the SRAM is organized into contiguous blocks accessible by the CPU and DMA controller. Both memory types are qualified for 100,000 write/erase cycles and retain data for 20 years at 85°C - verified per Renesas' industrial-grade qualification standards.

Is the UPD70F3766GF-GAT-AX pin-compatible with other V850ES/JG3-H family members?

Yes, the UPD70F3766GF-GAT-AX shares the same 100-pin LQFP package and pin assignment with μPD70F3765, μPD70F3767, and μPD70F3770 in the V850ES/JG3-H family. All share identical peripheral pin mappings, power/ground distribution, and debug interface layout. However, Flash size, RAM size, and peripheral enablement (e.g., second UART or extra timers) vary - requiring firmware verification before substitution.

What debug interfaces does the UPD70F3766GF-GAT-AX support?

The UPD70F3766GF-GAT-AX supports JTAG-based on-chip debugging via dedicated TCK/TMS/TDI/TDO/RESET pins, fully compatible with Renesas E2 emulator and third-party ICE tools. It enables non-intrusive breakpoints, real-time register/memory inspection, and flash programming without removing the UPD70F3766GF-GAT-AX from the target board. No SWD or serial-wire debug interface is implemented - JTAG is the sole standardized debug path.