Renesas R5F51306ADFK#50

Overview

R5F51306ADFK#50 from Renesas is a 32-bit RX CPU-based microcontroller with 256 KB flash, 32 KB SRAM, and 8 KB data flash, operating at up to 32 MHz (50 DMIPS), featuring 12-bit A/D (14 channels), dual 8-bit D/A, capacitive touch sensing (32 channels), RTC, and IEC60730 compliance for industrial control and appliance HMI applications.

For engineers reviewing the R5F51306ADFK#50 datasheet, R5F51306ADFK#50 pinout, R5F51306ADFK#50 application, or R5F51306ADFK#50 equivalent, key selection criteria include its LQFP-64 (0.8 mm pitch) package, –40°C to +85°C temperature grade, integrated CTSU with mutual capacitance support, and ELC-driven low-power peripheral coordination without CPU wake-up.

Technical Context

The R5F51306ADFK#50 implements the 32-bit RXv1 core with Harvard architecture, 5-stage pipeline, and variable-length instructions, delivering 50 DMIPS at 32 MHz. It integrates an Event Link Controller (ELC) enabling direct inter-module triggering-e.g., MTU timer events initiating A/D conversion-while the CPU remains in deep sleep mode.

Its clock system includes a high-speed on-chip oscillator (32 MHz ±1%), PLL (4–8 MHz input), sub-clock (32.768 kHz), and CAC for real-time frequency accuracy monitoring. Power management supports three low-power modes, including software standby with 0.37 µA supply current and 4.8 µs wake-up time using the low-power timer (LPT).

Key Specifications

Pinout & Package

LQFP-64 package (PLQP0064GA-A), 14 × 14 mm body, 0.8 mm pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F51306ADFK#50, R5F51306BDFK#30 offers identical functionality with updated manufacturing, while R5F51305ADFK#30 reduces memory capacity by half-enabling lower-cost deployment where firmware size permits-without sacrificing CTSU, A/D, or low-power features.

Availability

R5F51306ADFK#50 is available at Aetrix Electronics and suitable for industrial HMI, appliance control, and medical front-end applications requiring stable component supply, long lifecycle support, and IEC60730-compliant firmware execution.

Supply support for R5F51306ADFK#50 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 automotive, industrial, and IoT markets.

The RX130 Group-including R5F51306ADFK#50-is designed for cost-effective, low-power human-machine interface and sensor-processing applications demanding robust touch sensing, safety certification, and flexible communication interfaces.

FAQ

What is the maximum operating frequency and CPU performance of the R5F51306ADFK#50?

The R5F51306ADFK#50 operates at a maximum frequency of 32 MHz and delivers 50 DMIPS of processing performance using the 32-bit RXv1 CPU core. Its 5-stage pipeline, variable-length instruction set, and on-chip multiplier/divider enable efficient execution of real-time control and signal processing tasks without external acceleration.

Does the R5F51306ADFK#50 support capacitive touch sensing, and how many keys can it handle?

Yes, the R5F51306ADFK#50 integrates a Capacitive Touch Sensing Unit (CTSU) supporting up to 32 keys in mutual capacitance mode using its TS0–TS31 pins. The hardware-accelerated CTSU provides noise immunity, automatic baseline adjustment, and configurable scan parameters-enabling robust touch interfaces without host CPU overhead.

What are the memory resources available on the R5F51306ADFK#50?

The R5F51306ADFK#50 includes 256 KB of on-chip flash memory (zero wait states at 32 MHz), 32 KB of SRAM, and 8 KB of data flash rated for 1,000,000 program/erase cycles. The data flash supports Background Operation (BGO), allowing concurrent code execution and non-volatile parameter storage or firmware updates.

Is the R5F51306ADFK#50 qualified for industrial temperature operation?

Yes, the R5F51306ADFK#50 is rated for operation from –40°C to +85°C (D-grade), making it suitable for industrial control panels, building automation systems, and outdoor equipment where extended thermal reliability is required. Its on-chip temperature sensor and voltage monitoring circuits further enhance environmental robustness.

Which communication interfaces does the R5F51306ADFK#50 support, and how many channels are available?

The R5F51306ADFK#50 supports up to seven Serial Communications Interface (SCI) channels (including SCIg and SCIh variants), one I²C bus interface (RIIC), one Serial Peripheral Interface (RSPI), and one Remote Control Signal Receiver (REMC). These interfaces collectively enable asynchronous UART, I²C master/slave, SPI master/slave, LIN, and infrared remote decoding in a single device.