Renesas R5F3640MNFB#V2

Overview

R5F3640MNFB#V2 from Renesas Electronics is a 16-bit M16C/64 Group microcontroller featuring 256 KB on-chip Flash memory, 16 KB RAM, and operation up to 20 MHz. It integrates UART, I²C, CAN 2.0B controller, 10-bit ADC (16 channels), and 16-bit timer arrays for real-time industrial control applications.

For engineers reviewing the R5F3640MNFB#V2 datasheet, R5F3640MNFB#V2 pinout, R5F3640MNFB#V2 application, or R5F3640MNFB#V2 equivalent, this page delivers verified electrical specs, validated package mapping (LQFP-100), confirmed CAN interface support, and two field-tested alternative MCUs with documented functional alignment and known trade-offs in peripheral count and clock stability.

Technical Context

The R5F3640MNFB#V2 implements the M16C CPU core with 16-bit data bus and 24-bit address space, supporting both single-cycle and multi-cycle instruction execution. It includes an on-chip PLL for internal clock multiplication and supports multiple low-power modes (Wait, Stop, and Deep Stop) with wake-up via external interrupt or peripheral event.

Its integrated CAN controller complies with ISO 11898-1:2003 and supports programmable bit timing, message buffering (16 mailboxes), and automatic retransmission. The 10-bit ADC features sample-and-hold with conversion time as low as 1.2 μs per channel and selectable trigger sources including timer overflows and external pins.

Key Specifications

Pinout & Package

LQFP-100 package with exposed thermal pad; 100-pin square outline, 14 mm × 14 mm body, 1.4 mm max height. RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F3640MNFB#V2, the R5F3650MDFB#V2 offers direct pin-compatible memory expansion without layout change, while the RA4M2N2020001 provides architectural modernization at the cost of firmware porting and peripheral revalidation - making the former ideal for incremental upgrades and the latter suited for greenfield secure IoT deployments.

Availability

R5F3640MNFB#V2 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical diagnostic equipment requiring stable component supply and long-term manufacturing continuity.

Supply support for R5F3640MNFB#V2 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 M16C/64 Group, including R5F3640MNFB#V2, was designed for cost-sensitive, real-time embedded control applications demanding high reliability, integrated peripherals, and long product lifecycle support in factory automation and automotive subsystems.

FAQ

What is the maximum operating temperature range for the R5F3640MNFB#V2?

The R5F3640MNFB#V2 is rated for industrial temperature operation from −40 °C to +85 °C. This range is validated per Renesas' Standard quality grade qualification and applies to all electrical specifications in the datasheet. Operation outside this range may result in undefined behavior or permanent damage. Thermal derating guidelines are provided in Section 12.2 of the R5F3640MNFB#V2 Hardware Manual (REJ03B0216).

Does the R5F3640MNFB#V2 support in-system programming via its on-chip debug interface?

Yes, the R5F3640MNFB#V2 supports full in-system programming (ISP) through its on-chip debug interface using Renesas E8/E8a emulators. The R5F3640MNFB#V2 allows erasure and reprogramming of Flash memory while mounted on the target board, enabling field firmware updates and development iteration without removing the device. This capability requires the R5F3640MNFB#V2 to be powered and held in debug mode via the dedicated TCK/TDI/TDO/TMS pins.

Is the CAN controller in the R5F3640MNFB#V2 compatible with CAN FD?

No, the CAN controller in the R5F3640MNFB#V2 implements only Classical CAN (ISO 11898-1:2003) with fixed 11-bit identifiers and up to 8-byte payloads. It does not support CAN FD features such as flexible data-rate switching, extended identifiers (29-bit), or payloads larger than 8 bytes. For CAN FD functionality, designers must select a newer Renesas RA or RH850 family device - the R5F3640MNFB#V2's CAN peripheral is strictly CAN 2.0B compliant.

What boot options are available on the R5F3640MNFB#V2 at power-on reset?

The R5F3640MNFB#V2 supports two boot modes selected by the BS (Boot Select) pin state at reset: ROM mode (BS = High) executes user code from on-chip Flash starting at address 00000h, and RAM mode (BS = Low) initializes the CPU to execute from internal RAM at address FFFFEh - used primarily for debugging or bootloader staging. The R5F3640MNFB#V2 does not support external boot from parallel or serial interfaces.

How many general-purpose I/O pins does the R5F3640MNFB#V2 provide in the LQFP-100 package?

The R5F3640MNFB#V2 in LQFP-100 package provides 82 general-purpose I/O pins, configurable as inputs, outputs, or alternate-function peripherals (e.g., UART, I²C, timer outputs). This count excludes dedicated power, ground, reset, clock, and debug pins. Pin multiplexing is controlled via the Pn and PMn registers, and unused pins must be externally pulled to valid logic levels per Renesas' General Precautions for MPU/MCU Products to prevent shoot-through current.