Renesas R5F61645N50FPV

Overview

R5F61645N50FPV from Renesas Electronics is a 32-bit CISC microcontroller in the H8SX/1645 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 50 MHz, supports 5 V tolerant I/O, and targets industrial automation and motor control systems requiring deterministic timing and robust peripheral integration.

For engineers reviewing the R5F61645N50FPV datasheet, R5F61645N50FPV pinout, R5F61645N50FPV application, or R5F61645N50FPV equivalent, key selection criteria include its 144-pin LQFP package, on-chip debug support via JTAG, 12-bit ADC with 16 channels, and dual CAN interfaces with independent message buffers - all confirmed in the H8SX/1645 Group Hardware Manual Rev.2.00 (2009).

Technical Context

The R5F61645N50FPV implements the H8SX CPU core with three operating modes (Normal, Middle, Advanced) and supports memory-mapped I/O across 4 GB address space. Its system architecture integrates a Clock Pulse Generator (CPG) with PLL for flexible clock synthesis, Bus Controller (BSC) with wait-state control, and Data Transfer Controller (DTC) for autonomous peripheral-to-memory transfers without CPU intervention.

Peripheral subsystems include dual Serial Communication Interfaces (SCI) with LIN support, 16-bit Timer Pulse Unit (TPU) with PWM and input capture, Watchdog Timer (WDT) with windowed operation, and Programmable Pulse Generator (PPG). All peripherals are register-mapped in dedicated SFR areas and share interrupt vectors managed by the Interrupt Controller (INTC) with 128 priority levels.

Key Specifications

Pinout & Package

Package: 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch), RoHS-compliant, standard JEDEC MO-220 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F61645N50FPV-G, the base part lacks halogen-free certification but offers identical functionality; compared with R5F61643N50FPV, it adds 128 KB Flash, 8 KB RAM, and full dual-CAN - making it optimal for complex, networked industrial controllers requiring field-upgradable firmware and redundancy.

Availability

R5F61645N50FPV is available at Aetrix Electronics and suitable for industrial motor drives, building automation controllers, and programmable logic controller (PLC) modules requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp-up.

Supply support for R5F61645N50FPV 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 R5F61645N50FPV belongs to the H8SX/1645 Group - a 32-bit microcontroller line engineered for deterministic real-time control in harsh industrial environments, with emphasis on integrated communication (dual CAN), precision analog (12-bit ADC), and robust debug capabilities.

FAQ

What is the maximum operating frequency of the R5F61645N50FPV?

The R5F61645N50FPV operates at a maximum CPU frequency of 50 MHz, achieved using its on-chip Clock Pulse Generator (CPG) with PLL multiplier. This frequency is validated across the full industrial temperature range (−40°C to +85°C) and supports real-time execution of complex control algorithms such as Field-Oriented Control without external clock sources. The R5F61645N50FPV maintains timing compliance under worst-case voltage and temperature conditions per the H8SX/1645 Group Hardware Manual Rev.2.00.

Does the R5F61645N50FPV support JTAG debugging?

Yes, the R5F61645N50FPV includes full IEEE 1149.1-compliant JTAG support for boundary-scan testing, flash programming, and real-time debugging. Its JTAG interface enables non-intrusive breakpoints, register inspection, and memory access during active operation - critical for validating timing-critical firmware in motor control applications. The R5F61645N50FPV's debug architecture is documented in Section 15 of the H8SX/1645 Group Hardware Manual.

What are the key differences between R5F61645N50FPV and R5F61643N50FPV?

The R5F61645N50FPV includes 512 KB Flash, 32 KB RAM, and dual CAN 2.0B controllers, while the R5F61643N50FPV has 384 KB Flash, 24 KB RAM, and only one CAN interface. Both share identical CPU core, ADC, TPU, pinout, and package. The R5F61645N50FPV is suited for networked, feature-rich industrial controllers; the R5F61643N50FPV serves cost-optimized single-bus applications. Firmware developed for R5F61645N50FPV can run on R5F61643N50FPV with memory mapping adjustments.

Is the R5F61645N50FPV qualified for automotive applications?

No, the R5F61645N50FPV is classified as a "Standard" quality grade device per Renesas documentation and is intended for industrial, office, and consumer equipment - not automotive or safety-critical systems. It lacks AEC-Q100 qualification, extended temperature range (−40°C to +125°C), and automotive-specific failure-in-time (FIT) data. For automotive use, Renesas recommends RH850 or RL78/F1x families. The R5F61645N50FPV datasheet explicitly excludes transportation equipment per Notice #7 in the Hardware Manual.

What package type and pin count does the R5F61645N50FPV use?

The R5F61645N50FPV uses a 144-pin LQFP package (20 mm × 20 mm, 0.5 mm pitch) with exposed thermal pad. This package is mechanically and electrically identical across the H8SX/1645 Group and supports standard reflow soldering profiles. Pin assignments - including dedicated CAN differential pairs, ADC inputs, and JTAG signals - are fully documented in Section 1.4 of the H8SX/1645 Group Hardware Manual Rev.2.00. The R5F61645N50FPV's footprint is compatible with automated PCB assembly processes.