Renesas R5F51101ADNE#20

Overview

R5F51101ADNE#20 from Renesas is a 32-bit RX CPU core microcontroller operating at up to 32 MHz (50 DMIPS), featuring 32 KB flash, 10 KB SRAM, 12-bit A/D converter with 10 channels, RTC, and dual SCI interfaces - deployed in industrial sensor nodes requiring low-power operation and deterministic real-time control.

For engineers reviewing the R5F51101ADNE#20 datasheet, R5F51101ADNE#20 pinout, R5F51101ADNE#20 application, or R5F51101ADNE#20 equivalent, key selection criteria include its HWQFN-48 package, −40°C to +85°C temperature grade, 1.8–3.6 V supply range, software standby current of 0.35 μA, and integrated IEC 60730 safety functions for Class B compliance.

Technical Context

The R5F51101ADNE#20 implements a CISC Harvard architecture with five-stage pipeline and variable-length instructions, enabling ultra-compact code and single-cycle instruction execution. Its on-chip clock system includes a 32 MHz ±1% high-speed oscillator, sub-clock (32.768 kHz) for RTC, and dedicated 15 kHz IWDT oscillator - all managed via independent ICLK/PCLK/FCLK domains.

Peripheral integration centers on deterministic timing: MTU2 provides four 16-bit timer channels with input capture/output compare and phase counting; CMT offers two 16-bit match timers; and the DTC supports chain transfer triggered by 65 interrupt vectors - enabling autonomous data movement without CPU intervention during low-power modes.

Key Specifications

Pinout & Package

Packaged in a 48-pin HWQFN (PWQN0048KB-A), 7 × 7 mm, 0.5 mm pitch, with exposed thermal pad recommended to be connected to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F51103ADNE#U0 and R5F51101ADNF#U0, the R5F51101ADNE#20 delivers optimal balance of I/O count (34 pins), analog channel count (10), and package thermal performance (48-pin HWQFN) for mid-complexity industrial control designs.

Availability

R5F51101ADNE#20 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat controllers, programmable logic relays, and energy monitoring modules requiring stable component supply across extended product lifecycles.

Supply support for R5F51101ADNE#20 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 manufacturer specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RX110 Group, including R5F51101ADNE#20, is designed for cost-sensitive, low-power industrial and consumer applications demanding robust real-time performance, functional safety support, and compact packaging.

FAQ

What is the maximum operating frequency and CPU performance of the R5F51101ADNE#20?

The R5F51101ADNE#20 operates at a maximum frequency of 32 MHz and delivers 50 DMIPS of processing performance. Its RX CPU core features a five-stage pipeline, variable-length instruction encoding, and single-cycle execution for basic instructions - enabling efficient code density and deterministic real-time response critical for industrial control loops.

Does the R5F51101ADNE#20 support IEC 60730 functional safety requirements?

Yes, the R5F51101ADNE#20 includes hardware features required for Class B compliance under IEC 60730: a clock frequency accuracy measurement circuit (CAC), independent watchdog timer (IWDT) with dedicated oscillator, voltage detection circuits (LVD) with configurable thresholds, and built-in RAM test assist functions - reducing software certification burden for household and industrial appliances.

What are the memory resources available on the R5F51101ADNE#20?

The R5F51101ADNE#20 integrates 32 KB of on-chip flash memory (with no wait states at 32 MHz) and 10 KB of SRAM (also zero-wait-state). Flash supports programming at 1.8 V and is used for both instructions and operands; SRAM provides fast, deterministic access for stack, heap, and real-time data buffers.

Which communication interfaces does the R5F51101ADNE#20 provide?

The R5F51101ADNE#20 provides SCI × 2 (supporting asynchronous UART, clock-synchronous, simple I²C, and simple SPI modes), one I²C bus interface (RIIC) capable of 400 kbps and SMBus, and one serial peripheral interface (RSPI) operating up to 16 Mbps - enabling flexible connectivity to sensors, displays, wireless modules, and isolated communication ICs.

What package type and pin count does the R5F51101ADNE#20 use?

The R5F51101ADNE#20 uses a 48-pin HWQFN package (PWQN0048KB-A), measuring 7 × 7 mm with 0.5 mm pitch and an exposed thermal pad. This package provides 34 general-purpose I/O pins, supports 10 A/D channels, and is optimized for compact industrial PCB layouts with enhanced thermal dissipation versus smaller QFN variants.