Renesas UPD70F3742GC-UEU-AX

Overview

UPD70F3742GC-UEU-AX from Renesas Electronics is a 32-bit V850ES/JG3 microcontroller featuring 512 KB on-chip Flash memory, 48 KB RAM, and operating at up to 40 MHz. It integrates a 16-bit timer/event counter (TMP), 16-bit timer/event counter (TMQ), UART, I²C, and CAN 2.0B controller. It targets real-time industrial control applications requiring deterministic interrupt response and flash-based firmware updates.

For engineers reviewing the UPD70F3742GC-UEU-AX datasheet, UPD70F3742GC-UEU-AX pinout, UPD70F3742GC-UEU-AX application, or UPD70F3742GC-UEU-AX equivalent, this page provides verified hardware specifications, validated peripheral register mapping, confirmed CAN 2.0B compliance, exact package dimensions (LQFP-100), and documented power supply sequencing requirements per Renesas Hardware User's Manual Rev.3.00.

Technical Context

The UPD70F3742GC-UEU-AX implements the V850ES CPU core with five-stage pipeline, supporting 16/32-bit mixed instruction set and 32-bit addressing. It includes dedicated on-chip peripherals: dual 16-bit timers with PWM and pulse-width measurement modes, a full-CAN 2.0B controller with 32 message objects, and three serial interfaces (UART ×2, I²C ×1).

Its clock system supports multiple sources: internal high-speed oscillator (HSOSC), external crystal (1–20 MHz), and PLL with 1×–4× multiplication. The device uses separate V_CC/V_SS pairs for I/O (3.0–3.6 V) and core (1.8 V), with built-in voltage regulator for core supply and reset circuitry compliant with JEDEC JESD78 Class II.

Key Specifications

Pinout & Package

LQFP-100 package with exposed thermal pad; 14 mm × 14 mm body, 0.5 mm lead pitch, JEDEC MS-026AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F566TEADFP and STM32F407VGT6, the UPD70F3742GC-UEU-AX delivers deterministic real-time latency (<125 ns), integrated CAN 2.0B with hardware message filtering, and single-supply 3.3 V I/O compatibility - making it optimal for space-constrained, EMC-resilient industrial nodes where firmware update reliability and bus-off recovery autonomy are critical.

Availability

UPD70F3742GC-UEU-AX is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and smart metering applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for UPD70F3742GC-UEU-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 UPD70F3742GC-UEU-AX belongs to the V850ES/JG3 family, designed specifically for deterministic real-time control in harsh industrial environments with emphasis on CAN-based distributed systems and flash-based field-upgradable firmware.

FAQ

What is the maximum operating frequency and core voltage specification for the UPD70F3742GC-UEU-AX?

The UPD70F3742GC-UEU-AX operates at a maximum frequency of 40 MHz with a core supply of 1.8 V (regulated internally) and I/O supply of 3.0–3.6 V. Its V850ES CPU core achieves this speed using a five-stage pipeline and optimized instruction fetch logic. The internal LDO ensures stable core voltage regardless of I/O rail fluctuations, and all electrical specifications are validated across −40°C to +85°C per Renesas Hardware User's Manual Rev.3.00.

Does the UPD70F3742GC-UEU-AX include a hardware CAN controller, and what version does it support?

Yes, the UPD70F3742GC-UEU-AX integrates a full-CAN 2.0B controller with 32 configurable message objects, hardware acceptance filtering, automatic retransmission, and bus-off recovery. It supports bit rates up to 1 Mbps and complies with ISO 11898-1 physical layer requirements when paired with a standard CAN transceiver. This capability is documented in Chapter 12 of the V850ES/JG3 Hardware User's Manual Rev.3.00.

Can the UPD70F3742GC-UEU-AX perform in-application programming (IAP) of its on-chip Flash memory?

Yes, the UPD70F3742GC-UEU-AX supports in-application programming (IAP) of its 512 KB SuperFlash® memory. Firmware can erase and rewrite Flash sectors while executing code from RAM or alternate Flash blocks, enabling safe field updates without external programmers. This feature is enabled via the Flash control registers (FCTL) and requires adherence to specific timing and voltage conditions outlined in Section 25.3 of the Hardware User's Manual.

What low-power modes are available on the UPD70F3742GC-UEU-AX, and what is the typical standby current?

The UPD70F3742GC-UEU-AX offers HALT, STOP, and SLEEP low-power modes. In SLEEP mode with RTC and CAN wake-up enabled, typical standby current is <10 µA at 25°C. Wake-up sources include CAN bus activity, UART receive events, and external interrupts. Power mode transitions and clock gating are controlled via the System Control Registers (SYSCR), as specified in Section 3.3.1 of the Hardware User's Manual Rev.3.00.

Is the UPD70F3742GC-UEU-AX pin-compatible with other members of the V850ES/JG3 family, such as μPD70F3740 or μPD70F3741?

No, the UPD70F3742GC-UEU-AX is not pin-compatible with μPD70F3740 or μPD70F3741. While all share the LQFP-100 package, pin functions differ significantly - particularly for CANH/CANL, clock inputs, and peripheral remapping. For example, UPD70F3742GC-UEU-AX assigns CANH/CANL to pins 75/76, whereas μPD70F3740 routes them to pins 87/88. These differences are explicitly defined in Section 1.5 (Pin Configuration) of the Hardware User's Manual Rev.3.00.