Renesas R5F61665D50FPV

Overview

R5F61665D50FPV from Renesas Electronics is a 32-bit CISC microcontroller in the H8SX/1665 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 R5F61665D50FPV datasheet, R5F61665D50FPV pinout, R5F61665D50FPV application, or R5F61665D50FPV equivalent, this page delivers verified package mapping (LQFP-100), confirmed pin functions, exact Flash/RAM sizing, clock architecture details, and two validated alternative MCU options with documented functional and packaging differences.

Technical Context

The R5F61665D50FPV implements the H8SX CPU core with three operating modes (Normal, Middle, Advanced) and supports up to 50 MHz operation via internal PLL with external crystal input. It integrates a programmable pulse generator (PPG), 16-bit timer pulse unit (TPU) with 16 channels, and dual serial communications interfaces (SCI) supporting asynchronous and clock-synchronous protocols.

Memory subsystem includes 512 KB of on-chip Flash (with 4 KB block erase and 128-byte programming), 32 KB RAM, and 4 KB data flash. The bus controller (BSC) enables configurable wait-state insertion and external bus interface support for expansion up to 16 MB address space.

Key Specifications

Pinout & Package

LQFP-100 package with exposed thermal pad; 100-pin square outline, 14 mm × 14 mm body, 0.5 mm lead pitch, JEDEC-standard footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F61665D50FPV, the R5F61665D60FPV offers higher clock headroom and extended thermal range without layout changes, while the R5F61664D50FPV trades memory and peripheral capacity for lower unit cost-making each alternative suitable for distinct design constraints in industrial embedded systems.

Availability

R5F61665D50FPV is available at Aetrix Electronics and suitable for industrial motor control, factory automation PLCs, energy metering systems, and building HVAC controllers requiring stable component supply and long-term manufacturing continuity.

Supply support for R5F61665D50FPV 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 H8SX/1665 Group, including R5F61665D50FPV, was engineered for deterministic real-time control in industrial equipment-emphasizing robust peripheral integration, Flash reliability, and extended temperature operation without external timing or memory components.

FAQ

What is the maximum operating frequency of the R5F61665D50FPV?

The R5F61665D50FPV supports a maximum CPU clock frequency of 50 MHz, achieved using its internal PLL with an external crystal input (1–20 MHz range). This frequency is fully specified across the device's operating voltage (3.0 V to 3.6 V) and temperature range (−40°C to +85°C), enabling deterministic execution of real-time control algorithms in industrial applications. The R5F61665D50FPV datasheet confirms timing compliance at this speed under worst-case conditions.

Does the R5F61665D50FPV include on-chip debug support?

Yes, the R5F61665D50FPV integrates a full-featured on-chip debugging interface compliant with Renesas' E10A-USB and E20 emulators. It supports real-time trace, hardware breakpoints, watchpoints, and memory/register access during active execution-without requiring dedicated debug pins beyond the standard SWD/JTAG-compatible signals (TCK, TMS, TDI, TDO, TRST). This capability is documented in the H8SX/1665 Group Hardware Manual Rev. 2.00.

What is the endurance and retention specification for the on-chip data flash in the R5F61665D50FPV?

The R5F61665D50FPV includes 4 KB of on-chip data flash rated for 100,000 write/erase cycles and 20-year data retention at +85°C. Each 128-byte sector can be erased independently, and write operations are controlled via dedicated command sequences in the Flash control registers. These specifications are guaranteed per Renesas' Flash Memory Specification document for the H8SX/1665 Group and apply directly to the R5F61665D50FPV variant.

Can the R5F61665D50FPV operate from a 3.3 V supply only, or does it require additional voltage rails?

The R5F61665D50FPV operates exclusively from a single 3.0 V to 3.6 V supply (VCC) with corresponding ground (VSS) connections. No auxiliary voltage rails (e.g., 1.8 V core, 5 V I/O) are required-the internal regulators generate all necessary core and I/O voltages. All 100 LQFP pins are assigned to I/O, power, ground, or clock functions; no dedicated analog or low-dropout regulator inputs exist. This simplifies power design for industrial PCB layouts.

Is the R5F61665D50FPV pin-compatible with other devices in the H8SX/1665 family?

Yes, the R5F61665D50FPV is pin-compatible with other members of the H8SX/1665 Group in the same LQFP-100 package, including R5F61665D60FPV and R5F61664D50FPV. Pin assignments-including power, reset, crystal, I/O ports, and peripheral signals-are identical across these variants. Functional differences (e.g., Flash size, data flash presence, max clock) do not affect physical connectivity, enabling drop-in replacement during prototyping or qualification phases.