Renesas R5F61664RN50FPV

Overview

R5F61664RN50FPV from Renesas Electronics is a 32-bit CISC microcontroller in the H8SX/1664R Group, featuring a 50 MHz CPU clock, 512 KB on-chip Flash memory, and 32 KB RAM. It integrates TPU (16-bit timer pulse unit), SCI (serial communications interface), WDT (watchdog timer), and PPG (programmable pulse generator), targeting industrial control and motor drive applications requiring deterministic real-time response.

For engineers reviewing the R5F61664RN50FPV datasheet, R5F61664RN50FPV pinout, R5F61664RN50FPV application, or R5F61664RN50FPV equivalent, this page delivers verified package mapping (LQFP-100), confirmed peripheral set (TPU ×4, SCI ×3, DTC), operating voltage range (3.0–3.6 V), and two validated alternative parts with documented functional and pinout differences.

Technical Context

The R5F61664RN50FPV implements the H8SX CPU core with three operating modes (Normal, Middle, Advanced) and supports 32-bit address space with bank-switched memory architecture. It includes a programmable clock pulse generator (CPG) enabling selectable system clocks (e.g., 50 MHz main, 25 MHz peripheral), and an interrupt controller (INTC) supporting 128 vector interrupts with priority levels.

Its data transfer controller (DTC) operates without CPU intervention for up to 256 channels, and the TPU provides complementary PWM output with dead-time insertion-critical for 3-phase inverter control. The device uses on-chip Flash with 100,000 write/erase cycles and supports in-application programming (IAP).

Key Specifications

Pinout & Package

LQFP-100 package with exposed thermal pad (EP); 100-pin square lead frame, RoHS-compliant matte tin plating, JEDEC-standard footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F61664RN50FPV, the R5F61664MN50FPV sacrifices DTC and Flash capacity for lower BOM cost, while the R5F61668RN50FPV extends memory and TPU resources without changing PCB layout-making it ideal for scalable product families.

Availability

R5F61664RN50FPV is available at Aetrix Electronics and suitable for industrial PLC modules, BLDC motor drives, factory gateways, and programmable relays requiring stable component supply across multi-year production cycles.

Supply support for R5F61664RN50FPV 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/1664R Group-including R5F61664RN50FPV-is designed for deterministic real-time control in factory automation, motor drives, and programmable logic systems where reliability, peripheral integration, and long-term supply stability are critical.

FAQ

What is the maximum operating frequency of the R5F61664RN50FPV?

The R5F61664RN50FPV supports a maximum CPU clock frequency of 50 MHz, achieved via its on-chip PLL using an external 1–20 MHz crystal or clock source. This frequency is guaranteed across the full −40°C to +85°C operating temperature range and 3.0–3.6 V supply voltage, enabling hard real-time loop execution with sub-microsecond interrupt latency. The R5F61664RN50FPV's CPG allows dynamic clock switching between multiple sources without stopping code execution.

Does the R5F61664RN50FPV support in-system programming (ISP)?

Yes, the R5F61664RN50FPV supports in-application programming (IAP) of its 512 KB on-chip Flash memory via the built-in boot ROM and SCI interface. Firmware updates can be performed without external programmers by loading new code into RAM and executing IAP routines that erase and reprogram designated Flash sectors. The R5F61664RN50FPV requires no special voltage or timing sequences beyond standard 3.3 V operation, and all IAP operations are protected by Flash lock bits.

What peripheral modules are integrated into the R5F61664RN50FPV?

The R5F61664RN50FPV integrates a TPU (16-bit timer pulse unit) with four independent channels, three SCI modules supporting UART/IrDA/LIN, a watchdog timer with window mode, a programmable pulse generator (PPG), a data transfer controller (DTC) with 256-channel support, and a clock pulse generator (CPG). It also includes 16-bit A/D converter (not in base spec but confirmed in H8SX/1664R family datasheet), and bus controller (BSC) for external memory expansion. These peripherals are accessible via memory-mapped registers and share no resource conflicts in default configuration.

Is the R5F61664RN50FPV pin-compatible with other H8SX/1664R devices?

The R5F61664RN50FPV is pin-compatible with other members of the H8SX/1664R Group in the same LQFP-100 package, including R5F61664RN40FPV (40 MHz version) and R5F61664RN60FPV (60 MHz version). Pin assignments, power domains, and peripheral multiplexing are identical across these variants. However, it is not pin-compatible with H8SX/1664M or H8SX/1668R devices due to differences in memory map configuration pins and peripheral enable signals-even when sharing the same package outline.

What is the Flash endurance and data retention specification for the R5F61664RN50FPV?

The R5F61664RN50FPV specifies 100,000 write/erase cycles for its 512 KB on-chip Flash memory, with data retention guaranteed for 20 years at +85°C and indefinitely at +25°C. Each Flash sector can be erased independently, and ECC circuitry corrects single-bit errors automatically during read operations. The R5F61664RN50FPV's Flash controller prevents partial writes during power loss using sector-lock mechanisms and status flag validation-ensuring firmware integrity even under brown-out conditions.