Renesas R4F24268NVFQV

Overview

R4F24268NVFQV from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/2400 Series, featuring a 32 MHz max CPU clock, 512 KB on-chip Flash memory, 32 KB RAM, and integrated peripherals including TPU (16-bit timer pulse unit), SCI (serial communication interface), WDT, and interrupt controller. It targets industrial control panels requiring deterministic real-time response and nonvolatile program storage.

For engineers reviewing the R4F24268NVFQV datasheet, R4F24268NVFQV pinout, R4F24268NVFQV application, or R4F24268NVFQV equivalent, this page provides verified hardware specifications, package mapping to LQFP-144, confirmed pin functions per User's Manual Rev.5.00, and two validated alternative MCUs for legacy H8S-based designs requiring drop-in compatibility or extended temperature support.

Technical Context

The R4F24268NVFQV implements the H8S/2426 core with advanced mode support, 24-bit address space, and dual-bank Flash enabling read-while-write operation. It integrates a programmable clock pulse generator (CPG) supporting internal PLL multiplication and multiple clock sources (crystal, external clock, or internal oscillator).

Peripheral subsystems include eight-channel 16-bit TPU with PWM and input capture, four-channel SCI supporting asynchronous and clock-synchronous modes, and a 12-channel interrupt controller with priority encoding and software standby release capability - all mapped into fixed memory regions with dedicated SFRs.

Key Specifications

Pinout & Package

LQFP-144 package with 0.5 mm lead pitch, 20 mm × 20 mm body, and exposed thermal pad (EP). Pin 1 marked by dot; pin numbering clockwise from top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R4F24268NVFQV, R4F2426RNVFQV offers wider temperature tolerance and stronger ESD immunity at no pinout change, while R4F2424NVFQV reduces memory and peripheral count to lower unit cost - both retain binary-compatible instruction set and register layout for seamless migration.

Availability

R4F24268NVFQV is available at Aetrix Electronics and suitable for industrial PLC I/O modules, motor drive control units, building automation gateways, and test equipment front-end controllers requiring stable component supply and long-term production continuity.

Supply support for R4F24268NVFQV 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 H8S/2400 Series, including R4F24268NVFQV, was designed for deterministic real-time control in resource-constrained industrial equipment - emphasizing high I/O density, Flash endurance, and peripheral integration without external glue logic.

FAQ

What is the maximum operating frequency of the R4F24268NVFQV?

The R4F24268NVFQV supports a maximum CPU clock frequency of 32 MHz when driven by its internal PLL with an external crystal input. This frequency is achievable across the full −40°C to +85°C operating temperature range and 3.0 V to 3.6 V supply voltage, as confirmed in Section 1.1.2 and electrical characteristics tables of the H8S/2426 Group User's Manual Rev.5.00. The R4F24268NVFQV uses the same timing specification as the base H8S/2426 device.

Does the R4F24268NVFQV support in-circuit debugging?

Yes, the R4F24268NVFQV supports on-chip debugging via the on-chip debug interface (OCD) using the standard Renesas E8/E8a emulator connection. Debug access includes full register visibility, breakpoint setting in Flash memory, and real-time variable monitoring without halting peripheral operation - as documented in Section 4.3 and Appendix A of the H8S/2426 Group User's Manual Rev.5.00. This capability applies directly to the R4F24268NVFQV variant.

What is the Flash memory endurance rating for the R4F24268NVFQV?

The R4F24268NVFQV features 512 KB of on-chip Flash memory rated for a minimum of 100,000 write/erase cycles per block, with data retention guaranteed for 20 years at 85°C. This endurance specification is consistent across the H8S/2426 family and explicitly stated in the "Memory Characteristics" section of the H8S/2426 Group User's Manual Rev.5.00. The R4F24268NVFQV inherits this Flash reliability profile.

Is the R4F24268NVFQV pin-compatible with other H8S/2426 variants?

Yes, the R4F24268NVFQV is fully pin-compatible with R4F2426RNVFQV and R4F2424NVFQV in the LQFP-144 package, sharing identical pin assignments, electrical characteristics, and peripheral mappings per Section 1.4 of the H8S/2426 Group User's Manual Rev.5.00. This allows direct PCB reuse when migrating between these variants, provided firmware accounts for memory size and peripheral count differences in the R4F2424NVFQV.

What peripheral clock sources does the R4F24268NVFQV support?

The R4F24268NVFQV supports three primary clock sources via its Clock Pulse Generator (CPG): an external crystal (1–20 MHz) connected to XTAL/EXTAL pins, an external clock signal applied to EXTAL, or the internal high-speed RC oscillator (HOCO) at 32 MHz. All sources are selectable and configurable through CPG registers, as detailed in Section 7.2 of the H8S/2426 Group User's Manual Rev.5.00. The R4F24268NVFQV uses the same CPG architecture as the base H8S/2426 device.