Renesas R5F3651TNFC#U0

Overview

R5F3651TNFC#U0 from Renesas Electronics is a 16-bit M16C/60 Series CPU core microcontroller with 768 KB program ROM, 16 KB RAM, and 47 KB data flash, operating at up to 32 MHz (VCC1 = 2.7–5.5 V). It integrates 111 CMOS I/O ports, 10-bit A/D converter (26 channels), dual 8-bit D/A converters, CEC interface, and three-phase motor control timers - used in industrial HMI, audio/video subsystems, and embedded appliance control.

For engineers reviewing the R5F3651TNFC#U0 datasheet, R5F3651TNFC#U0 pinout, R5F3651TNFC#U0 application, or R5F3651TNFC#U0 equivalent, key selection criteria include its 128-pin LQFP package, -20°C to +85°C operating temperature, integrated CEC transceiver for HDMI-CEC compliance, and on-chip dead-time timer for inverter gate drive.

Technical Context

The R5F3651TNFC#U0 implements the M16C/60 CPU core with 16×16-bit multiplier and MAC instruction support, enabling deterministic real-time motor control loops. Its clock system includes main/sub oscillators, 125 kHz on-chip oscillator, 40 MHz ±10% high-speed oscillator, and PLL frequency synthesizer with selectable divide ratios (1/2/4/8/16).

Peripheral integration includes six UART/serial interfaces (UART0–2, UART5–7), multi-master I²C-bus, two remote control signal receivers (32 kHz operation), CRC-CCITT/CRC-16 calculator, and DMAC with four channels supporting single/repeat transfer modes triggered by 43 sources.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (PLQP0128KB-A), 20 mm × 20 mm, 0.5 mm lead pitch, exposed pad not specified. Dual power supply: VCC1 (core/I/O), VCC2 (external bus), AVCC/AVSS (analog domain).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F3651EDFC and R5F3651RNFC, the R5F3651TNFC#U0 provides the largest program ROM (768 KB) in the -20°C to +85°C grade, enabling complex GUI stacks, multiple communication protocols, and field-upgradable firmware without external memory expansion.

Availability

R5F3651TNFC#U0 is available at Aetrix Electronics and suitable for industrial HMI panels, HDMI-CEC consumer electronics, and appliance motor control units requiring stable component supply and long-term lifecycle support.

Supply support for R5F3651TNFC#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 solutions for automotive, industrial, and IoT markets.

The M16C/65 Group targets cost-sensitive, real-time embedded applications requiring high integration, low EMI, and mixed-signal capability - especially in audio/video, home appliances, and industrial control.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F3651TNFC#U0?

The R5F3651TNFC#U0 operates at up to 32 MHz with a supply voltage range of 2.7 V to 5.5 V on both VCC1 and VCC2 pins. The minimum instruction execution time is 31.25 ns under these conditions, and the device supports wait states (0–8) for slower external memory interfaces. This voltage range accommodates both 3.3 V and 5 V system designs without level-shifting.

Does the R5F3651TNFC#U0 include hardware support for HDMI Consumer Electronics Control (CEC)?

Yes, the R5F3651TNFC#U0 includes dedicated CEC circuitry compliant with HDMI CEC standards. It supports CEC transmit/receive, arbitration loss detection, and automatic ACK output at 32 kHz. Pin P8_5 serves as the CEC data line, and the hardware handles protocol timing and collision detection - reducing CPU overhead versus bit-banged implementations.

How many analog-to-digital converter (ADC) channels does the R5F3651TNFC#U0 support, and what is its resolution?

The R5F3651TNFC#U0 features a 10-bit resolution A/D converter with 26 input channels, including sample-and-hold functionality. Channels are distributed across ports P0, P2, P10, and P9 (AN0_0–AN0_7, AN2_0–AN2_7, AN4–AN7, ADTRG), enabling simultaneous sampling of multiple sensors such as temperature, current, and position feedback in motor control applications.

What package type and pin count does the R5F3651TNFC#U0 use?

The R5F3651TNFC#U0 uses a 128-pin LQFP package designated PLQP0128KB-A (formerly 128P6Q-A), measuring 20 mm × 20 mm with 0.5 mm lead pitch. It is RoHS-compliant and designed for reflow soldering. This package provides full access to all peripherals, including external bus interface, 111 I/O lines, and analog functions - unlike the 100-pin variants which reduce I/O count and bus width.

Can the R5F3651TNFC#U0 perform three-phase motor control without external gate driver ICs?

Yes, the R5F3651TNFC#U0 integrates a three-phase motor control circuit with on-chip dead-time timer and complementary PWM outputs on timers TA1, TA2, TA4, and TB2. These resources allow direct generation of six PWM signals with programmable dead time, enabling full-bridge inverter control without external timing logic - though external gate drivers are still required for MOSFET/IGBT switching.