Renesas UPD70F3746GJ(R)-GAE-AX

Overview

UPD70F3746GJ(R)-GAE-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(R)-GAE-AX datasheet, UPD70F3746GJ(R)-GAE-AX pinout, UPD70F3746GJ(R)-GAE-AX application, or UPD70F3746GJ(R)-GAE-AX equivalent, key selection criteria include its V850ES CPU core compatibility, CAN 2.0B interface support, Flash programming via on-chip bootloader, and industrial-grade thermal and ESD robustness per Renesas' Standard quality grade.

Technical Context

The UPD70F3746GJ(R)-GAE-AX implements the V850ES RISC architecture with 32-bit data path and 32-bit address space, supporting both little-endian and big-endian operation modes. Its memory subsystem includes 512 KB of on-chip Flash with erase/program cycle endurance ≥10⁴ cycles and 48 KB of SRAM with parity error detection.

Peripherals include two independent 16-bit timer/event counters (TMP and TMQ), one CAN 2.0B controller with 32 message objects, three UART channels with LIN support, and an I²C interface compliant with SMBus v2.0. Clock generation integrates PLL with selectable input sources (crystal, external clock, or internal RC oscillator).

Key Specifications

Pinout & Package

UPD70F3746GJ(R)-GAE-AX is housed in a 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Renesas Hardware User's Manual Rev.3.00 (Sep 2010), Section 1.5 (Pin Configuration) and Section 2.1 (List of Pin Functions).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD70F3746GJ(R)-GAE-AX, the R5F572NND*FP offers higher compute throughput and integrated FPU but requires PCB redesign and new qualification; the UPD70F3742GJ(R)-GAE-AX provides identical functionality at lower memory capacity, enabling direct substitution without layout changes.

Availability

UPD70F3746GJ(R)-GAE-AX is available at Aetrix Electronics and suitable for industrial motor control, factory automation PLCs, energy metering gateways, and building HVAC controllers requiring stable component supply across extended product lifecycles.

Supply support for UPD70F3746GJ(R)-GAE-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 UPD70F3746GJ(R)-GAE-AX belongs to the V850ES/JG3 microcontroller family, designed for deterministic real-time control in resource-constrained industrial equipment where reliability, long-term availability, and legacy toolchain compatibility are critical.

FAQ

What is the maximum operating frequency of the UPD70F3746GJ(R)-GAE-AX?

The UPD70F3746GJ(R)-GAE-AX operates at a maximum CPU frequency of 40 MHz, achieved using its integrated PLL with configurable multiplication factors. This frequency is validated across the full industrial temperature range (−40°C to +85°C) and supply voltage range (2.7 V to 5.5 V). The actual achievable frequency depends on clock source stability and PCB layout integrity, as specified in Chapter 6 of the Hardware User's Manual Rev.3.00.

Does the UPD70F3746GJ(R)-GAE-AX support CAN FD?

No, the UPD70F3746GJ(R)-GAE-AX integrates a 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 implement CAN FD protocol features such as flexible data-rate switching or extended data length. For CAN FD capability, Renesas recommends the RA6T2 or RH850/F1L families, which are architecturally distinct from the V850ES platform.

What debug tools are compatible with the UPD70F3746GJ(R)-GAE-AX?

The UPD70F3746GJ(R)-GAE-AX supports on-chip debugging via IEEE 1149.1 JTAG interface, fully compatible with Renesas QB-MINI2 and QB-V850MINI emulators. These tools enable real-time breakpoint setting, register inspection, and Flash programming without requiring external debug probes beyond the standard JTAG header. Debug configuration must align with the device's JTAG TAP controller settings documented in Section 3.2.2 of the Hardware User's Manual.

Is the UPD70F3746GJ(R)-GAE-AX pin-compatible with other V850ES/JG3 devices?

Yes, the UPD70F3746GJ(R)-GAE-AX shares the same 144-pin LQFP package and pin assignment with other members of the V850ES/JG3 family, including μPD70F3739, μPD70F3740, μPD70F3741, and μPD70F3742. Pin compatibility is confirmed in Section 1.5 (Pin Configuration) of the Hardware User's Manual Rev.3.00, enabling board-level reuse across variants differing only in Flash/RAM capacity and peripheral enablement.

What is the Flash endurance specification for the UPD70F3746GJ(R)-GAE-AX?

The UPD70F3746GJ(R)-GAE-AX specifies ≥10,000 program/erase cycles for its 512 KB on-chip Flash memory, measured under standard conditions (VDD = 3.3 V ±10%, TA = 25°C). Endurance is verified per JEDEC JESD22-A117 and applies to individual sectors; wear leveling must be implemented in firmware if uniform usage across the entire Flash array is required. Data retention is guaranteed for 20 years at 85°C junction temperature.