Renesas R5F3650NNFA#U0

Overview

R5F3650NNFA#U0 from Renesas is a 16-bit M16C/65 microcontroller with 512 KB Flash ROM, 32 KB RAM, 10-bit ADC (26 channels), 8-bit DAC (2 channels), and integrated UART/I²C/SSU serial interfaces. It operates at up to 50 MHz across 3.0–5.5 V and supports industrial motor control, power supply management, and embedded instrumentation.

For engineers reviewing the R5F3650NNFA#U0 datasheet, R5F3650NNFA#U0 pinout, R5F3650NNFA#U0 application, or R5F3650NNFA#U0 equivalent, key selection criteria include its 50 MHz CPU performance, 24-channel PWM capability with dead-time control, intelligent I/O timer functions, on-chip oscillator with subclock RTC support, and PLQP0100KB-A 100-pin LQFP package for high-density industrial PCBs.

Technical Context

The R5F3650NNFA#U0 implements the M16C/65 core - a 108-instruction-set 16-bit CPU with 20 ns minimum instruction execution time at 50 MHz. It integrates DMACII for peripheral-triggered data transfers and four independent clock sources: main clock, PLL, subclock (125 kHz), and on-chip oscillator.

Its timer subsystem includes TimerA and TimerB (11 channels total), Intelligent I/O (19 input capture/output compare channels), and dedicated 3-phase inverter control logic with shared dead-time timer. The ADC features sample-and-hold and simultaneous conversion capability across 26 channels.

Key Specifications

Pinout & Package

PLQP0100KB-A is a 100-pin LQFP package with exposed thermal pad, rated for -40°C to +85°C operation. Pin functions include VCC/VSS pairs distributed for noise suppression, dedicated reset and oscillation stop detection pins, and grouped peripheral signals (e.g., UART0–UART8 TX/RX on dedicated port blocks).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F64165DFB and R5F64175DFB, the R5F3650NNFA#U0 offers higher Flash capacity (512 KB) and larger RAM (32 KB), enabling more complex control algorithms, larger lookup tables, and extended diagnostic logging - making it optimal for next-generation industrial drives and programmable power systems.

Availability

R5F3650NNFA#U0 is available at Aetrix Electronics and suitable for industrial motor control, switch-mode power supply design, and programmable logic controller development requiring stable component supply and long-term manufacturing continuity.

Supply support for R5F3650NNFA#U0 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 is a global semiconductor leader specializing in microcontrollers, analog, and power management solutions for industrial, automotive, and infrastructure markets.

The R5F3650NNFA#U0 belongs to the M16C/65 family - designed specifically for real-time embedded control in resource-constrained industrial environments where deterministic timing, mixed-signal integration, and long product lifecycles are essential.

FAQ

What is the maximum operating frequency of the R5F3650NNFA#U0?

The R5F3650NNFA#U0 operates at a maximum frequency of 50 MHz, achieving a 20 ns minimum instruction execution time. This performance level supports real-time control loops in motor drives and digital power supplies. The device uses an on-chip PLL to multiply the input clock, and its timing specifications are guaranteed across the full industrial temperature range (-40°C to +85°C) and 3.0–5.5 V supply voltage.

Does the R5F3650NNFA#U0 include on-chip debug support?

Yes, the R5F3650NNFA#U0 integrates on-chip debug functionality compliant with Renesas' E8/E8a debug interface standard. This allows full JTAG-based debugging including breakpoints, watchpoints, and real-time register/memory access without requiring external emulators. The R5F3650NNFA#U0 supports both flash programming and in-circuit debugging via the dedicated TCK/TMS/TDI/TDO pins.

What package type and pin count does the R5F3650NNFA#U0 use?

The R5F3650NNFA#U0 is housed in the PLQP0100KB-A package: a 100-pin LQFP with 14 mm × 14 mm body size, 0.5 mm lead pitch, and exposed thermal pad. This package meets JEDEC MS-026 standards and is qualified for industrial temperature operation (-40°C to +85°C). Its pin layout separates analog/digital supplies and groups high-speed peripherals to minimize noise coupling.

How many ADC channels and what resolution does the R5F3650NNFA#U0 provide?

The R5F3650NNFA#U0 features a 10-bit successive-approximation ADC with 26 input channels and integrated sample-and-hold circuitry. It supports simultaneous sampling across multiple channels and hardware-triggered conversions synchronized to timer events or PWM periods - essential for current sensing in 3-phase motor control. Conversion time is 1.2 μs per channel under typical conditions.

Is the R5F3650NNFA#U0 pin-compatible with other M16C/65 family members?

No, the R5F3650NNFA#U0 is not pin-compatible with other M16C/65 variants. While it shares the PLQP0100KB-A package footprint with several R32C-series devices (e.g., R5F64165DFB), pin assignments for peripherals such as UART, ADC, and PWM differ significantly between families. Migration requires PCB redesign and firmware adaptation due to differences in register mapping, interrupt vectors, and peripheral module implementation.