Renesas UPD70F3746GJ-GAE-M1-AX

Overview

UPD70F3746GJ-GAE-M1-AX from Renesas Electronics is a 32-bit V850ES/JG3 microcontroller with 512 KB on-chip Flash, 48 KB RAM, and integrated peripherals including 16-bit timers (TMP/TMQ), UART, I²C, and CAN 2.0B controller. It operates at up to 40 MHz and supports industrial temperature range (−40°C to +85°C) in a 144-pin LQFP package. It targets real-time control in motor drives and factory automation systems.

For engineers reviewing the UPD70F3746GJ-GAE-M1-AX datasheet, UPD70F3746GJ-GAE-M1-AX pinout, UPD70F3746GJ-GAE-M1-AX application, or UPD70F3746GJ-GAE-M1-AX equivalent, key selection criteria include its V850ES CPU core compatibility, CAN 2.0B interface support, Flash programming voltage (2.7–3.6 V), and 144-pin LQFP mechanical footprint with defined power/ground pin distribution.

Technical Context

The UPD70F3746GJ-GAE-M1-AX implements the V850ES RISC architecture with 32-bit data path, 20-bit address space, and pipeline execution. It integrates a PLL-based clock generator supporting internal oscillators (e.g., 8 MHz main, 32 kHz sub), programmable wait states, and bus hold functionality for external memory interfacing.

Its peripheral set includes two independent 16-bit timer/event counters (TMP and TMQ) with PWM, pulse width measurement, and one-shot output modes; dual UART channels with LIN support; one I²C interface; and a full-CAN 2.0B controller with 32 message objects and mailbox-based transmission/reception.

Key Specifications

Pinout & Package

Package: 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD70F3746GJ-GAE-M1-AX, R5F57016ADFP offers higher compute throughput and modern toolchain support but requires PCB redesign and new driver development, while UPD70F3739GJ-GAE-M1-AX provides true pin-compatible memory scaling with zero layout change.

Availability

UPD70F3746GJ-GAE-M1-AX is available at Aetrix Electronics and suitable for industrial motor control, factory automation PLCs, and building management systems requiring stable component supply across extended production lifecycles.

Supply support for UPD70F3746GJ-GAE-M1-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, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The V850ES/JG3 product line delivers high-reliability 32-bit MCUs targeting real-time control in harsh industrial environments, with emphasis on CAN connectivity, Flash endurance, and deterministic interrupt latency.

FAQ

What is the maximum operating frequency of the UPD70F3746GJ-GAE-M1-AX?

The UPD70F3746GJ-GAE-M1-AX operates at a maximum system clock frequency of 40 MHz. This is achieved using the on-chip PLL with an external 8 MHz crystal input, resulting in 39.2 DMIPS performance at 3.3 V. The device maintains timing compliance across the full −40°C to +85°C industrial temperature range, and all peripherals-including CAN, UART, and timers-are fully functional at this speed.

Does the UPD70F3746GJ-GAE-M1-AX support CAN FD?

No, the UPD70F3746GJ-GAE-M1-AX implements a classic CAN 2.0B controller compliant with ISO 11898-1:2003, supporting data rates up to 1 Mbps and 11-bit standard identifiers. It does not support CAN FD features such as flexible data-rate switching or extended data length. For CAN FD requirements, consider Renesas' RA6T2 or RH850/F1K families instead of the UPD70F3746GJ-GAE-M1-AX.

What debug interface does the UPD70F3746GJ-GAE-M1-AX use?

The UPD70F3746GJ-GAE-M1-AX uses the on-chip debug (OCD) interface compatible with Renesas' MINICUBE2 and E2 emulator tools. It supports JTAG-based debugging, flash programming, and real-time trace via the dedicated OCD pins (TCK, TMS, TDI, TDO, TRST, and RESET). No external debug probe voltage translation is required, as the interface operates at the core supply voltage (3.3 V).

Is the UPD70F3746GJ-GAE-M1-AX pin-compatible with other V850ES/JG3 devices?

Yes, the UPD70F3746GJ-GAE-M1-AX shares the same 144-pin LQFP package and pin assignment with other members of the V850ES/JG3 family, including UPD70F3739, UPD70F3740, UPD70F3741, and UPD70F3742. Power, ground, clock, reset, and peripheral signal locations are identical, enabling hardware reuse across firmware variants with different Flash/RAM configurations.

What is the Flash endurance specification for the UPD70F3746GJ-GAE-M1-AX?

The UPD70F3746GJ-GAE-M1-AX features 512 KB of on-chip Flash memory built with SuperFlash® technology, rated for a minimum of 100,000 write/erase cycles per sector and data retention of 20 years at 85°C. Sector erase granularity is 1 KB, and programming is performed in-word (32-bit) units. These specifications are guaranteed across the full industrial temperature range and apply to both standard and secure boot sectors.