Renesas UPD70F3451GC(R)-UBT-A

Overview

UPD70F3451GC(R)-UBT-A from Renesas Electronics is a 32-bit V850E/IF3 single-chip microcontroller featuring 512 KB on-chip Flash memory, 48 KB RAM, and integrated peripherals including UARTA/B, CSIB, I²C, 12-bit ADC (16 channels), six 16-bit timers, and 6-phase PWM output capability. It operates at up to 40 MHz and supports industrial temperature range (−40°C to +85°C) in a 100-pin LQFP package. It is used in motor control systems requiring real-time precision and embedded automation interfaces.

For engineers reviewing the UPD70F3451GC(R)-UBT-A datasheet, UPD70F3451GC(R)-UBT-A pinout, UPD70F3451GC(R)-UBT-A application, or UPD70F3451GC(R)-UBT-A equivalent, key selection criteria include Flash endurance (100K write/erase cycles), V850E CPU core compatibility, peripheral integration for sensor interfacing and motor drive timing, and qualification for Standard-grade industrial applications per Renesas quality classification.

Technical Context

The UPD70F3451GC(R)-UBT-A implements the V850E CPU core with 32-bit RISC architecture, supporting 16-/32-bit instructions and pipeline execution. It integrates a clock generator with PLL, low-voltage detector (LVI), and standby modes including HALT and STOP for power management.

Its peripheral set includes dual UARTs with FIFO, CSIB (SPI-compatible serial interface), I²C bus interface, three independent 16-bit timer modules (Timer M, AA, AB), Timer Q option for 6-phase PWM generation, and A/D converters 0–2 with simultaneous sampling capability across multiple channels.

Key Specifications

Pinout & Package

UPD70F3451GC(R)-UBT-A is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Renesas Hardware User's Manual U18279EJ3V0UD, Chapter 1.2.4 (V850E/IF3 pin configuration) and Chapter 2 (Pin Functions).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD70F3451GC(R)-UBT-A, UPD70F3452GC(R)-UBT-A offers higher memory density in identical packaging, while R5F566TEADFP delivers superior motor-control-specific peripherals at the cost of architectural divergence and higher BOM complexity.

Availability

UPD70F3451GC(R)-UBT-A is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and embedded HMI applications requiring stable component supply, long-term lifecycle support, and Standard-grade reliability certification.

Supply support for UPD70F3451GC(R)-UBT-A 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 UPD70F3451GC(R)-UBT-A belongs to the V850E/IF3 product line, designed for cost-sensitive, real-time embedded applications demanding high integration, Flash endurance, and deterministic timing - especially in motor control and industrial automation.

FAQ

What is the maximum operating frequency of the UPD70F3451GC(R)-UBT-A?

The UPD70F3451GC(R)-UBT-A operates at a maximum frequency of 40 MHz. This speed is achieved using the on-chip PLL clock generator with an external crystal (1–10 MHz) or clock source. The 40 MHz limit ensures timing predictability for real-time tasks such as PWM generation and ADC sampling, and is validated across the full industrial temperature range (−40°C to +85°C). All timing parameters in the electrical specifications assume operation at this rated frequency.

Does the UPD70F3451GC(R)-UBT-A support in-system programming of its Flash memory?

Yes, the UPD70F3451GC(R)-UBT-A supports in-system programming (ISP) of its 512 KB on-chip Flash memory using the built-in bootloader and standard UART interface. It leverages SuperFlash® technology licensed from Silicon Storage Technology, enabling erase/write cycles without external high-voltage circuitry. The Flash endurance is rated at 100,000 cycles, and sector protection features prevent accidental overwrite of critical firmware sections during field updates.

What peripheral interfaces are available on the UPD70F3451GC(R)-UBT-A for sensor and actuator connectivity?

The UPD70F3451GC(R)-UBT-A provides UARTA/B for serial communication, CSIB (SPI-compatible), I²C bus interface, and a 12-bit 16-channel ADC for analog sensor inputs. It also includes six 16-bit timers and Timer Q option for 6-phase PWM outputs - directly supporting brushless DC motor drivers and digital actuator control. These interfaces are multiplexed onto GPIO ports and configured via dedicated peripheral control registers, allowing flexible pin assignment in system design.

Is the UPD70F3451GC(R)-UBT-A qualified for automotive applications?

No, the UPD70F3451GC(R)-UBT-A is classified as a Standard-grade Renesas product, intended for industrial, office, and consumer applications such as motor control, test equipment, and home appliances. It is not qualified to AEC-Q100 or other automotive reliability standards. For automotive use, Renesas recommends devices from the RH850 or RL78/Auto families, which undergo extended temperature testing, enhanced ESD performance, and automotive-specific failure analysis.

What development tools are officially supported for the UPD70F3451GC(R)-UBT-A?

Renesas officially supports the QB-MINI2 on-chip debug emulator with programming function, QB-V850MINI emulator, and PG-FP5 flash memory programmer for the UPD70F3451GC(R)-UBT-A. Software toolchain includes CA850 C compiler, ID850QB integrated debugger, and SM+ system simulator. These tools enable full-cycle development - from simulation and debugging to Flash programming - and are documented in Renesas User's Manual U18279EJ3V0UD and related tool manuals.