Renesas R5F61668RD50FPV

Overview

R5F61668RD50FPV from Renesas Electronics is a 32-bit CISC microcontroller in the H8SX/1668R Group, featuring a 50 MHz maximum CPU clock, 1 MB on-chip Flash memory, and integrated peripherals including TPU, SCI, WDT, and DTC. It operates from a 3.0–3.6 V supply and targets industrial control and motor drive applications requiring deterministic real-time response.

For engineers reviewing the R5F61668RD50FPV datasheet, R5F61668RD50FPV pinout, R5F61668RD50FPV application, or R5F61668RD50FPV equivalent, key selection criteria include its 144-pin LQFP package, 50 MHz operation with no external PLL required, 1 MB Flash with 10,000 write/erase cycles, and support for single-cycle instruction execution in Advanced Mode.

Technical Context

The R5F61668RD50FPV implements the H8SX CPU core with three operating modes (Normal, Middle, Advanced), enabling configurable performance vs. power trade-offs. Its system architecture integrates a Bus Controller (BSC), Clock Pulse Generator (CPG), and Interrupt Controller (INTC) to coordinate memory access, clock domain management, and priority-based interrupt handling.

Peripheral integration includes a 16-bit Timer Pulse Unit (TPU) with 16 channels, four Serial Communications Interfaces (SCI) supporting asynchronous and clock-synchronous modes, and a Data Transfer Controller (DTC) that offloads CPU for memory-to-peripheral transfers. All peripherals are memory-mapped and accessible via 32-bit addressing space.

Key Specifications

Pinout & Package

Package: 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch), RoHS-compliant, plastic body with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F61668RD50FPV, the R5F61668MD50FPV offers identical pinout and basic functionality but trades Flash endurance and clock stability for lower cost, while the R5F566TEADFP delivers significantly higher compute capability at the expense of legacy peripheral compatibility and increased BOM complexity.

Availability

R5F61668RD50FPV is available at Aetrix Electronics and suitable for industrial PLC modules, motor drive controllers, factory HMI panels, and power supply monitoring units requiring stable component supply across multi-year production cycles.

Supply support for R5F61668RD50FPV 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 headquartered in Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The R5F61668RD50FPV belongs to the H8SX/1668R Group - a mature 32-bit MCU family engineered for deterministic real-time control in industrial equipment where reliability, long-term availability, and toolchain stability are prioritized over raw performance scaling.

FAQ

What is the maximum operating frequency of the R5F61668RD50FPV?

The R5F61668RD50FPV supports a maximum CPU clock frequency of 50 MHz under specified 3.0–3.6 V supply and −40°C to +85°C ambient conditions. This frequency is achieved using the on-chip clock pulse generator with an external crystal or clock source applied to CLKIN, and does not require an external PLL. The R5F61668RD50FPV maintains timing compliance across all operating modes, including Advanced Mode where most instructions execute in a single cycle.

Does the R5F61668RD50FPV include on-chip Flash memory, and what is its endurance rating?

Yes, the R5F61668RD50FPV integrates 1 MB of on-chip Flash memory rated for 10,000 write/erase cycles and data retention of 20 years at 85°C. This Flash supports block erase, page programming, and secure lock-bit protection to prevent unauthorized access. The R5F61668RD50FPV uses this memory for both program storage and configurable parameter tables, eliminating the need for external nonvolatile storage in many industrial designs.

Which communication interfaces are integrated into the R5F61668RD50FPV?

The R5F61668RD50FPV includes four independent Serial Communications Interface (SCI) modules, each configurable as UART, LIN, or clock-synchronous serial (SPI-like) interface. It also supports IEBus (Inter-Equipment Bus) via dedicated pins and provides full-duplex capability with programmable baud rates, parity, and stop-bit settings. No external transceivers are needed for RS-232 or RS-485 physical layers when paired with appropriate driver ICs. The R5F61668RD50FPV does not integrate CAN or USB controllers.

What package type and pin count does the R5F61668RD50FPV use?

The R5F61668RD50FPV is housed in a 144-pin LQFP package measuring 20 mm × 20 mm with 0.5 mm lead pitch. This RoHS-compliant package exposes 112 general-purpose I/O pins, plus dedicated power, ground, clock, and reset terminals. The R5F61668RD50FPV's pinout matches other members of the H8SX/1668R Group, enabling layout reuse across variants with differing memory sizes or peripheral configurations.

Is the R5F61668RD50FPV suitable for automotive applications?

No, the R5F61668RD50FPV is classified as a Standard-grade Renesas product intended for industrial, office, and consumer equipment - not automotive or safety-critical systems. It is not AEC-Q100 qualified, lacks automotive temperature range support (−40°C to +125°C), and does not include features such as error-correcting code (ECC) memory or lockstep cores required for ASIL-B/C compliance. For automotive use, Renesas recommends RX23T or RH850/F1L series devices instead of the R5F61668RD50FPV.