Renesas R5F51105ADNE#20

Overview

R5F51105ADNE#20 from Renesas is a 32-bit RX CPU-based microcontroller operating at up to 32 MHz (50 DMIPS), featuring 128 KB on-chip flash, 16 KB SRAM, 14-channel 12-bit ADC with 1.0 µs conversion time, RTC, and dual SCI + I²C + RSPI interfaces - deployed in industrial sensor nodes and low-power HMI control units.

For engineers reviewing the R5F51105ADNE#20 datasheet, R5F51105ADNE#20 pinout, R5F51105ADNE#20 application, or R5F51105ADNE#20 equivalent, this page delivers verified package mapping (PWQN0048KB-A, 48-pin HWQFN), confirmed peripheral channel counts per package, supply voltage range (1.8–3.6 V), software standby current (0.35 µA), and real-world timing roles for MTU2-triggered ADC sampling.

Technical Context

The R5F51105ADNE#20 implements a CISC Harvard architecture with five-stage pipeline and variable-length instructions, enabling ultra-compact code density. Its RX CPU core supports 64-bit accumulator results from 32×32 multiply operations and executes basic instructions in one clock cycle at 32 MHz.

It integrates dedicated clock domains: ICLK (system, up to 32 MHz), PCLK (peripherals, up to 32 MHz), and FCLK (FlashIF, up to 32 MHz), each independently configurable via clock dividers. The on-chip high-speed oscillator delivers 32 MHz ±1% accuracy across −40°C to +85°C.

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. Pin functions are multiplexed via the Multi-function Pin Controller (MPC) to support flexible peripheral routing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit MCU applications.

Compared with R5F51105AGNE#U0, the R5F51105ADNE#20 trades extended temperature rating for lower unit cost and same functionality at −40°C to +85°C; versus R5F51104ADNE#U0, it adds 32 KB flash for future firmware expansion or cryptographic libraries without changing PCB layout.

Availability

R5F51105ADNE#20 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostats, motor control subsystems, and energy monitoring modules requiring stable component supply across multi-year production cycles.

Supply support for R5F51105ADNE#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 leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RX110 Group, including the R5F51105ADNE#20, was designed for cost-sensitive, low-power embedded applications demanding rich peripheral integration, functional safety readiness, and compact 48-pin packaging.

FAQ

What is the maximum operating frequency and CPU performance of the R5F51105ADNE#20?

The R5F51105ADNE#20 operates at a maximum frequency of 32 MHz and delivers 50 DMIPS of processing performance. Its RX CPU core achieves this through a five-stage pipeline, variable-length instruction encoding, and single-cycle execution of basic instructions. This performance level supports real-time tasks such as motor control loops, sensor fusion algorithms, and protocol stacks in resource-constrained designs.

Which package type does the R5F51105ADNE#20 use, and what are its key mechanical features?

The R5F51105ADNE#20 uses the PWQN0048KB-A package: a 48-pin HWQFN measuring 7 × 7 mm with 0.5 mm pitch and an exposed thermal pad. The pad must be connected to VSS for optimal thermal dissipation and EMI suppression. This compact, lead-free package supports high-density PCB layouts while maintaining signal integrity for mixed-signal applications.

Does the R5F51105ADNE#20 support functional safety standards like IEC 60730?

Yes, the R5F51105ADNE#20 includes hardware features required for IEC 60730 Class B compliance, including a clock frequency accuracy measurement circuit (CAC), independent watchdog timer (IWDT) with dedicated oscillator, and built-in RAM test assist functions. These capabilities enable developers to implement self-test routines and fault detection mechanisms without external components.

How many communication interfaces does the R5F51105ADNE#20 integrate, and what are their configurations?

The R5F51105ADNE#20 integrates five communication channels: two SCI interfaces (SCI1 and SCI5 supporting asynchronous, clock-synchronous, and simple I²C/SPI modes), one I²C bus interface (RIIC) capable of 400 kbps and SMBus, and one RSPI interface supporting up to 16 Mbps master operation. All interfaces are accessible via multiplexed pins controlled by the MPC.

What are the low-power consumption characteristics of the R5F51105ADNE#20 in standby mode?

In software standby mode, the R5F51105ADNE#20 draws only 0.35 µA typical supply current and recovers in 4.8 µs - enabling rapid wake-up from external interrupts or RTC alarms. This ultra-low quiescent current, combined with three configurable low-power modes (sleep, deep sleep, software standby), makes it ideal for battery-powered endpoints in industrial IoT deployments.