Renesas R5F61645LN50FPV

Overview

R5F61645LN50FPV from Renesas Electronics is a 32-bit CISC microcontroller in the H8SX/1645L Group, featuring a 50 MHz max CPU clock, 512 KB on-chip Flash memory, and integrated peripherals including TPU, SCI, WDT, and DTC for real-time industrial control applications.

For engineers reviewing the R5F61645LN50FPV datasheet, R5F61645LN50FPV pinout, R5F61645LN50FPV application, or R5F61645LN50FPV equivalent, this page delivers verified technical context, package mapping, functional specifications, and validated alternative options aligned with Renesas' official Hardware Manual Rev.2.00 (2009).

Technical Context

The R5F61645LN50FPV implements the H8SX CPU core with three operating modes (Normal, Middle, Advanced), supports up to 50 MHz operation via internal PLL, and integrates a programmable pulse generator (PPG), 16-bit timer pulse unit (TPU) with 16 channels, and dual serial communication interfaces (SCI) with baud rate generation and framing error detection.

It features a 32-bit address space, 16-bit data bus width in maximum mode, on-chip RAM (32 KB), and memory protection unit (MPU) support for secure code execution - all confirmed in the H8SX/1645 Group Hardware Manual Rev.2.00.

Key Specifications

Pinout & Package

Package: 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch), lead-free and RoHS-compliant per Renesas documentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F61645LN50FPV, the R5F61645MN50FPV extends thermal reliability for harsh environments, while the R5F61643LN50FPV offers identical footprint and peripherals at reduced memory capacity - both enable reuse of existing layout and driver libraries.

Availability

R5F61645LN50FPV is available at Aetrix Electronics and suitable for industrial PLC controllers, motor drive control units, smart energy meters, and factory automation gateways requiring stable component supply across multi-year production cycles.

Supply support for R5F61645LN50FPV 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.

The R5F61645LN50FPV belongs to the H8SX/1645L Group - a family of high-performance 32-bit MCUs designed for deterministic real-time control in industrial automation, motion control, and metering applications.

FAQ

What is the maximum operating frequency of the R5F61645LN50FPV?

The R5F61645LN50FPV operates at a maximum CPU frequency of 50 MHz, achieved using its internal PLL with an external crystal (1–20 MHz) or oscillator input. This frequency is fully supported across the specified industrial temperature range (−40°C to +85°C) and voltage range (3.0 V to 3.6 V). The R5F61645LN50FPV maintains timing compliance without wait states for on-chip Flash and RAM access at this speed.

Does the R5F61645LN50FPV include on-chip debug capability?

Yes, the R5F61645LN50FPV integrates a full on-chip debug system (OCDS) compliant with Renesas' standard debug protocol. It supports real-time program execution control, hardware breakpoints, memory/register read/write, and trace buffer capture - all without requiring external JTAG emulators. This capability is built into the R5F61645LN50FPV silicon and enabled via dedicated debug pins (TCK, TMS, TDI, TDO, TDO).

What package type and pin count does the R5F61645LN50FPV use?

The R5F61645LN50FPV is housed in a 144-pin LQFP package (20 mm × 20 mm, 0.5 mm pitch), with exposed pad for thermal dissipation. All pin assignments - including power, ground, I/O, clock, reset, and debug signals - are defined in Section 1.4 of the H8SX/1645 Group Hardware Manual Rev.2.00. This package is RoHS-compliant and compatible with standard reflow soldering profiles.

How much Flash and RAM memory does the R5F61645LN50FPV provide?

The R5F61645LN50FPV integrates 512 KB of on-chip Flash memory and 32 KB of on-chip SRAM. Flash endurance is rated for 100,000 write/erase cycles with 20-year data retention at +85°C. SRAM is directly accessible by the CPU at full 50 MHz speed with zero wait states. Both memory blocks are protected by the R5F61645LN50FPV's configurable memory protection unit (MPU).

Is the R5F61645LN50FPV qualified for automotive applications?

No, the R5F61645LN50FPV is classified as a "Standard" quality grade device per Renesas' product grading system and is intended for industrial, office, and consumer applications - not automotive. It is not AEC-Q100 qualified, lacks automotive-specific qualification testing, and does not meet the extended temperature or reliability requirements for vehicle subsystems. For automotive use, Renesas recommends the RH850 or RL78/F1x families instead of the R5F61645LN50FPV.