Renesas R5F61668RJFTFPV

Overview

R5F61668RJFTFPV from Renesas Electronics is a 32-bit CISC microcontroller in the H8SX/1668R Group, featuring a 40 MHz max CPU clock, 512 KB on-chip Flash memory, and integrated peripherals including TPU, SCI, WDT, and DTC. It operates at 3.3 V supply voltage and targets industrial control systems requiring deterministic real-time response and nonvolatile program storage.

For engineers reviewing the R5F61668RJFTFPV datasheet, R5F61668RJFTFPV pinout, R5F61668RJFTFPV application, or R5F61668RJFTFPV equivalent, key selection criteria include its 144-pin LQFP package, 40 MHz operation with internal PLL, 512 KB Flash + 32 KB RAM memory map, and support for multiple low-power modes (HALT, STOP, and WAIT) in embedded control designs.

Technical Context

The R5F61668RJFTFPV implements the H8SX CPU core with three operating modes (Normal, Middle, Advanced), supporting 32-bit addressing and 16-bit instruction words. Its system architecture integrates a Bus Controller (BSC), Clock Pulse Generator (CPG) with PLL-based clock synthesis, and an Interrupt Controller (INTC) with 128 interrupt sources.

Peripheral integration includes a 16-bit Timer Pulse Unit (TPU) with 16 channels, four Serial Communications Interfaces (SCI) supporting asynchronous and clock-synchronous modes, a Data Transfer Controller (DTC) for autonomous memory-to-peripheral transfers, and a Watchdog Timer (WDT) with independent clock source and windowed timeout detection.

Key Specifications

Pinout & Package

The R5F61668RJFTFPV is housed in a 144-pin LQFP package with exposed thermal pad, compliant with JEDEC MO-220, and rated for industrial temperature range (−40°C to +85°C). Pin assignments are defined per Hardware Manual Rev. 2.00 (2008), Section 1.4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F61664RJFTFPV and R5F61668MJFTFPV, the R5F61668RJFTFPV provides optimal balance of memory capacity, peripheral richness, and industrial temperature rating - making it the default choice for general-purpose embedded control where extended temp or reduced Flash are not constraints.

Availability

R5F61668RJFTFPV is available at Aetrix Electronics and suitable for industrial PLCs, motor drives, building automation gateways, and factory asset monitors requiring stable component supply across multi-year production cycles.

Supply support for R5F61668RJFTFPV 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 H8SX/1668R Group, including R5F61668RJFTFPV, was designed for deterministic real-time control in industrial automation equipment - emphasizing robust peripheral integration, Flash endurance, and long-term supply stability.

FAQ

What is the maximum operating frequency of the R5F61668RJFTFPV?

The R5F61668RJFTFPV supports a maximum CPU operating frequency of 40 MHz, achieved using its internal PLL with external crystal input (1–20 MHz). This frequency enables sub-25 ns instruction cycle times and meets timing requirements for fast closed-loop control in motor drives and PLCs. The R5F61668RJFTFPV's CPG module allows dynamic clock switching between main and sub-clocks for power optimization without compromising real-time responsiveness.

Does the R5F61668RJFTFPV support in-system programming (ISP) via its serial interface?

Yes, the R5F61668RJFTFPV supports in-system programming through its SCI interface using Renesas' Flash Development Toolkit (FDT) and standard UART boot mode. The R5F61668RJFTFPV enters boot mode upon power-on when the MOD0 and MOD1 pins are held in specific states, allowing firmware updates without a dedicated programmer. This capability is validated in the H8SX/1668R Group Hardware Manual Rev. 2.00, Section 1.4.2.

What low-power modes does the R5F61668RJFTFPV offer, and what is the typical current draw in STOP mode?

The R5F61668RJFTFPV offers HALT, STOP, and WAIT low-power modes. In STOP mode, the CPU, clocks, and most peripherals halt while retaining RAM and RTC operation; typical current draw is ≤10 µA at 3.3 V and 25°C. The R5F61668RJFTFPV exits STOP mode via external interrupt or RTC alarm, enabling rapid wake-up (<10 µs) for event-driven applications like sensor polling or fault monitoring.

Is the R5F61668RJFTFPV pin-compatible with other devices in the H8SX/1668R Group?

Yes, the R5F61668RJFTFPV is pin-compatible with other 144-pin LQFP variants in the H8SX/1668R Group, including R5F61664RJFTFPV and R5F61663RJFTFPV. All share identical pin assignments, power sequencing, and reset behavior per the Hardware Manual Rev. 2.00. However, differences in Flash size and peripheral channel count (e.g., TPU channels) require firmware adaptation - the R5F61668RJFTFPV is not a drop-in replacement without verifying memory map and peripheral register usage.

What is the Flash memory endurance and data retention specification for the R5F61668RJFTFPV?

The R5F61668RJFTFPV specifies Flash memory endurance of 10,000 write/erase cycles and data retention of 20 years at 85°C or 100 years at 25°C. These values are guaranteed per Renesas' H8SX/1668R Group data sheet and apply to all 512 KB of on-chip Flash. The R5F61668RJFTFPV supports sector erase and byte/word programming, enabling robust firmware update strategies with wear leveling implemented in application software.