Renesas UPD70F3757GJ(R)-GAE-AX

Overview

UPD70F3757GJ(R)-GAE-AX from Renesas Electronics is a 32-bit V850ES/HJ3 single-chip microcontroller featuring a 48 MHz CPU clock, 512 KB on-chip flash memory, 48 KB RAM, and integrated peripherals including 8-channel 10-bit ADC, 32-bit timer/counter, CAN 2.0B controller, and UART/I²C/SPI interfaces. It targets real-time industrial control systems requiring deterministic response and functional safety support.

For engineers reviewing the UPD70F3757GJ(R)-GAE-AX datasheet, UPD70F3757GJ(R)-GAE-AX pinout, UPD70F3757GJ(R)-GAE-AX application, or UPD70F3757GJ(R)-GAE-AX equivalent, key selection considerations include its V850ES/HJ3 core architecture, CAN interface compliance, flash endurance (100K write/erase cycles), operating temperature range (–40°C to +85°C), and automotive-grade qualification per AEC-Q100 Grade 2.

Technical Context

The UPD70F3757GJ(R)-GAE-AX implements the V850ES/HJ3 CPU core with 32-bit RISC architecture, 5-stage pipeline, and Harvard memory organization. It supports interrupt nesting up to 16 priority levels and includes a memory protection unit (MPU) for secure task isolation in multitasking environments.

Peripherals are tightly coupled via an on-chip bus matrix: the CAN controller operates at up to 1 Mbps with 32 message objects and programmable acceptance filtering; the 10-bit ADC achieves 1.2 μs conversion time with hardware-triggered sequencing across 8 input channels.

Key Specifications

Pinout & Package

UPD70F3757GJ(R)-GAE-AX is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions include dedicated CANH/CANL differential I/O, 8 ADC input pins (AN0–AN7), 32 general-purpose I/O lines with configurable pull-up/pull-down, and dual reset inputs (RESETN and WDRSTN).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with R5F57016ADFP#30 and RA4M1AFB#AC0, the UPD70F3757GJ(R)-GAE-AX delivers balanced 32-bit real-time capability with mature CAN 2.0B support and industrial temperature resilience - ideal for sustaining legacy V850-based platforms while meeting ASIL-B readiness requirements without architectural overhaul.

Availability

UPD70F3757GJ(R)-GAE-AX is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, smart metering, and factory gateway applications requiring stable component supply and long-term lifecycle assurance.

Supply support for UPD70F3757GJ(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 global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The UPD70F3757GJ(R)-GAE-AX belongs to the V850ES/HJ3 product line, designed specifically for deterministic real-time control in harsh industrial and automotive environments where functional safety, CAN connectivity, and long-term supply stability are critical.

FAQ

What is the maximum operating frequency of the UPD70F3757GJ(R)-GAE-AX?

The UPD70F3757GJ(R)-GAE-AX operates at a maximum CPU clock frequency of 48 MHz. This is achieved using the on-chip PLL with an external crystal input (typically 8 MHz) or internal oscillator. The 48 MHz specification is validated across the full –40°C to +85°C temperature range and 2.7 V to 5.5 V supply voltage, ensuring consistent real-time performance in industrial environments. All timing-critical peripherals-including the CAN controller and ADC-scale synchronously with this clock.

Does the UPD70F3757GJ(R)-GAE-AX support CAN FD?

No, the UPD70F3757GJ(R)-GAE-AX integrates a CAN 2.0B-compliant controller only, supporting standard and extended frame formats at up to 1 Mbps. It does not implement CAN FD features such as flexible data-rate, larger payload (up to 64 bytes), or CRC enhancements. For CAN FD capability, Renesas offers newer RA-family MCUs like the RA4M1AFB#AC0. The UPD70F3757GJ(R)-GAE-AX remains optimized for legacy CAN 2.0B networks common in industrial PLCs and automotive body control units.

What debug interface does the UPD70F3757GJ(R)-GAE-AX use?

The UPD70F3757GJ(R)-GAE-AX uses the JTAG interface for on-chip debugging and flash programming, compatible with Renesas' E1/E20 emulators and third-party tools supporting V850ES cores. It supports full breakpoint, watchpoint, and real-time trace capabilities via the on-chip debug module. Unlike newer Renesas families, it does not support SWD or Serial Wire Debug. Debug access requires dedicated TCK/TMS/TDI/TDO pins and adheres to IEEE 1149.1 standards.

Is the UPD70F3757GJ(R)-GAE-AX qualified for automotive applications?

Yes, the UPD70F3757GJ(R)-GAE-AX is qualified per AEC-Q100 Grade 2 (–40°C to +105°C junction temperature), making it suitable for under-hood and cabin automotive applications including body control modules and gateway ECUs. Its design includes built-in self-test (BIST) for flash and RAM, parity protection on SRAM, and fail-safe clock monitoring - all aligned with ISO 26262 ASIL-B requirements. Renesas provides automotive-specific documentation and failure-in-time (FIT) data upon request.

How much user-accessible flash memory does the UPD70F3757GJ(R)-GAE-AX provide?

The UPD70F3757GJ(R)-GAE-AX provides 512 KB of on-chip flash memory, fully accessible to user code and data. This includes space for application firmware, configuration tables, and bootloader code. Flash is organized in 128-byte pages and supports 100,000 write/erase cycles with typical retention of 20 years at 85°C. No portion is reserved exclusively for factory boot code; users may allocate the entire 512 KB as needed, subject to linker configuration and security settings.