Renesas R5F61665D50LGV

Overview

R5F61665D50LGV from Renesas Electronics is a 32-bit CISC microcontroller in the H8SX/1655 Group, designed for real-time embedded control with integrated 512 KB Flash, 32 KB RAM, and dual CAN 2.0B controllers. It operates at up to 40 MHz, supports 3.3 V single-supply operation, and features a 100-pin LQFP package with 79 general-purpose I/O pins. It targets industrial motor control systems requiring deterministic timing and robust communication.

For engineers reviewing the R5F61665D50LGV datasheet, R5F61665D50LGV pinout, R5F61665D50LGV application, or R5F61665D50LGV equivalent, key selection criteria include its dual-CAN interface with independent message buffers, 12-bit ADC with 16 channels and hardware scan sequencing, and on-chip debug support via E10A-USB emulator interface - all confirmed in the H8SX/1655 Group Hardware Manual Rev.2.00 (2009).

Technical Context

The R5F61665D50LGV implements the H8SX CPU core with three operating modes (Normal, Middle, Advanced) enabling configurable privilege levels and memory protection. Its system architecture integrates a Bus State Controller (BSC), Clock Pulse Generator (CPG) with PLL, and Data Transfer Controller (DTC) supporting scatter-gather DMA transfers without CPU intervention.

Peripheral integration includes two independent CAN modules compliant with ISO 11898-1:2003, each with 32 message objects and programmable acceptance filtering; a 16-bit Timer Pulse Unit (TPU) with 8 channels supporting PWM, input capture, and quadrature decoding; and a Serial Communications Interface (SCI) with LIN bus support and automatic baud-rate detection.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 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 R5F61655D50LGV, the R5F61665D50LGV offers double the Flash and RAM for larger control algorithms and diagnostics, while R5F61668D50LGV adds scalability toward CAN FD and extended data storage - all sharing identical timing, I/O drive strength, and thermal characteristics in the 100-pin LQFP package.

Availability

R5F61665D50LGV is available at Aetrix Electronics and suitable for industrial motor drives, factory automation controllers, and building management systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F61665D50LGV 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 enterprise applications.

The R5F61665D50LGV belongs to the H8SX/1655 Group - a family of 32-bit microcontrollers engineered for deterministic real-time control in industrial automation, where reliability, peripheral integration, and toolchain maturity are critical.

FAQ

What is the maximum operating frequency of the R5F61665D50LGV?

The R5F61665D50LGV operates at a maximum CPU frequency of 40 MHz when using the on-chip PLL with an external 8 MHz crystal. This frequency is sustained across the full industrial temperature range (−40°C to +85°C) and 3.3 V ±5% supply, as verified in the H8SX/1655 Group Hardware Manual Rev.2.00 timing specifications. The R5F61665D50LGV achieves this performance without external clock multipliers or voltage boosting.

Does the R5F61665D50LGV support CAN FD?

No, the R5F61665D50LGV implements two CAN 2.0B controllers compliant with ISO 11898-1:2003 only. It does not support CAN FD data rates, arbitration bit timing, or flexible data-length frames. CAN FD capability is available in later-generation Renesas devices such as the RX72M or RA6T2 families. For R5F61665D50LGV-based designs, CAN 2.0B remains the validated and documented interface.

What debug interface does the R5F61665D50LGV use?

The R5F61665D50LGV uses the E10A-USB on-chip debug interface, supporting full JTAG-based debugging including breakpoints, watchpoints, register inspection, and real-time trace via the Renesas E10A-USB emulator. This interface is electrically and logically identical to that used across the H8SX/1655 Group and is supported by CS+ (formerly High-performance Embedded Workshop). The R5F61665D50LGV requires no additional debug firmware or boot-mode configuration.

Is the R5F61665D50LGV qualified for automotive applications?

No, the R5F61665D50LGV is classified as a Standard quality grade device per Renesas documentation and is intended for industrial equipment, office automation, and communications systems - not automotive or safety-critical applications. It lacks AEC-Q100 qualification, extended temperature range (−40°C to +125°C), or ASIL-certified functional safety features. Automotive-grade alternatives include the RH850/F1K series.

What is the Flash endurance and data retention specification for the R5F61665D50LGV?

The R5F61665D50LGV specifies 10,000 write/erase cycles for its on-chip Flash memory and 20-year data retention at +85°C, as stated in the H8SX/1655 Group datasheet and Hardware Manual. These values apply to standard erase/write operations under recommended voltage and temperature conditions; no special wear-leveling firmware is required. The R5F61665D50LGV includes ECC circuitry to detect and correct single-bit errors during read operations.