Renesas R5F61665N50LGV

Overview

R5F61665N50LGV from Renesas Electronics is a 32-bit CISC microcontroller in the H8SX/1665 Group, featuring a 50 MHz maximum CPU clock, 512 KB on-chip Flash memory, and integrated peripherals including TPU, SCI, WDT, and DTC - deployed in industrial motor control and factory automation systems requiring deterministic real-time response.

For engineers reviewing the R5F61665N50LGV datasheet, R5F61665N50LGV pinout, R5F61665N50LGV application, or R5F61665N50LGV equivalent, key selection criteria include its 144-pin LQFP package, 3.3 V single-supply operation, 16-channel 16-bit timer pulse unit, 3-channel serial communications interface, and support for H8SX instruction set compatibility with legacy H8 development tools.

Technical Context

The R5F61665N50LGV implements the H8SX CPU core with three operating modes (Normal, Middle, Advanced), enabling scalable performance and power management. It integrates a Clock Pulse Generator (CPG) supporting PLL-based clock synthesis, a Bus Controller (BSC) for external memory expansion up to 16 MB, and a Data Transfer Controller (DTC) that offloads CPU during peripheral-to-memory transfers.

Its interrupt architecture includes a 16-level priority Interrupt Controller (INTC) with vector table relocation via VBR, and peripheral modules such as the 16-bit Timer Pulse Unit (TPU) provide PWM generation, input capture, and phase counting - all synchronized to a common system clock domain with precise timing control.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F61665N50LGV, the R5F61665N50FPV reduces I/O and external bus capability for lower BOM cost, while the R5F61668N50LGV adds CAN and Flash capacity - making the original R5F61665N50LGV optimal for non-CAN industrial motion control with balanced I/O and memory.

Availability

R5F61665N50LGV is available at Aetrix Electronics and suitable for industrial motor drive, programmable logic controller (PLC), and factory automation HMI applications requiring stable component supply across multi-year production cycles.

Supply support for R5F61665N50LGV 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 manufacturer specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The R5F61665N50LGV belongs to the H8SX/1665 Group - a family of high-performance 32-bit MCUs designed specifically for deterministic real-time control in industrial equipment, where low-latency interrupt response and peripheral co-processing are critical.

FAQ

What is the maximum operating frequency of the R5F61665N50LGV?

The R5F61665N50LGV operates at a maximum CPU clock frequency of 50 MHz, achieved via its integrated Clock Pulse Generator (CPG) with PLL circuitry. This frequency is supported across the full −40°C to +85°C industrial temperature range and 3.3 V ±0.3 V supply voltage. The R5F61665N50LGV delivers consistent timing performance without derating under nominal conditions, enabling tight control loop execution in motor drive and PLC applications.

Does the R5F61665N50LGV support CAN bus communication?

No, the R5F61665N50LGV does not include a CAN controller. Its peripheral set comprises three Serial Communications Interfaces (SCI), a Data Transfer Controller (DTC), Timer Pulse Unit (TPU), and Watchdog Timer (WDT), but no CAN module. For CAN-capable alternatives in the same pinout family, consider the R5F61668N50LGV, which adds a full CAN 2.0B controller while maintaining mechanical and electrical compatibility with the R5F61665N50LGV.

What package type and pin count does the R5F61665N50LGV use?

The R5F61665N50LGV uses a 144-pin LQFP package (20 mm × 20 mm, 0.5 mm pitch) with exposed thermal pad. It provides 112 general-purpose I/O pins, plus dedicated power, clock, reset, and debug interface signals. This package is RoHS-compliant and rated for industrial temperature operation, and it supports standard reflow soldering profiles per J-STD-020.

How much on-chip memory does the R5F61665N50LGV include?

The R5F61665N50LGV integrates 512 KB of on-chip Flash memory for program storage and 32 KB of SRAM for data and stack operations. The Flash supports block erase and byte-programming, with security lock bits to prevent unauthorized access. The R5F61665N50LGV's memory map is optimized for real-time execution, allowing zero-wait-state access to both Flash and RAM at its maximum 50 MHz operating frequency.

Is the R5F61665N50LGV pin-compatible with other H8SX/1665 series devices?

Yes, the R5F61665N50LGV shares the same 144-pin LQFP footprint and signal mapping with other members of the H8SX/1665 Group, including the R5F61665N50FPV (128-pin variant excluded) and R5F61668N50LGV. Pin compatibility extends to power, clock, reset, and all peripheral I/O assignments - enabling drop-in replacement within the same package variant, provided software accounts for differences in Flash size, DTC channel count, or optional peripherals like CAN.