Renesas R5F51105ADLF#U0

Overview

R5F51105ADLF#U0 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 (1.0 µs conversion), RTC with calendar mode, and dual SCI + I²C + RSPI interfaces. It targets low-power industrial sensor nodes and battery-powered control systems requiring deterministic real-time response.

For engineers reviewing the R5F51105ADLF#U0 datasheet, R5F51105ADLF#U0 pinout, R5F51105ADLF#U0 application, or R5F51105ADLF#U0 equivalent, key selection criteria include its 64-pin WFLGA (5 × 5 mm, 0.5 mm pitch) package, −40 to +85°C temperature grade, software standby current of 0.35 µA, and integrated clock accuracy measurement (CAC) for IEC 60730 compliance.

Technical Context

The R5F51105ADLF#U0 implements a CISC Harvard architecture with five-stage pipeline and variable-length instructions, enabling ultra-compact code and single-cycle instruction execution. Its RX CPU core includes a 64-bit accumulator for 32×32-bit multiply results and dedicated hardware for division and barrel shifting.

On-chip peripherals are clocked independently: ICLK (system, up to 32 MHz), PCLK (peripherals, up to 32 MHz), and FCLK (FlashIF, up to 32 MHz). The MTU2 timer unit supports phase counting and input capture across four 16-bit channels, while the DTC enables chain transfers triggered by 65 interrupt sources without CPU intervention.

Key Specifications

Pinout & Package

Packaged in a 64-pin WFLGA (PWLG0064KA-A), the R5F51105ADLF#U0 uses a 5 × 5 mm footprint with 0.5 mm pitch and an exposed die pad recommended for thermal and electrical grounding to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F51105AGLF#U0, the R5F51105ADLF#U0 trades extended temperature rating for lower cost and optimized power consumption in commercial-grade applications; versus R5F51103ADLF#U0, it delivers 100% more flash and 60% more RAM for complex firmware with communication stacks and data logging.

Availability

R5F51105ADLF#U0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering interfaces, home appliance controllers, and medical diagnostic peripherals requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for R5F51105ADLF#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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and IoT markets.

The RX110 Group, including the R5F51105ADLF#U0, was designed for ultra-low-power, cost-sensitive embedded control applications demanding real-time performance, functional safety support (IEC 60730), and rich analog/peripheral integration in compact packages.

FAQ

What is the maximum operating frequency and associated performance of the R5F51105ADLF#U0?

The R5F51105ADLF#U0 operates at a maximum frequency of 32 MHz, delivering 50 DMIPS of processing performance. This is achieved with zero-wait-state execution from both on-chip flash and SRAM, enabled by its high-speed bus architecture and optimized RX CPU core. The 32 MHz clock is generated by the internal high-speed oscillator, specified to ±1% accuracy across −20 to +85°C, eliminating the need for an external crystal in many applications.

Does the R5F51105ADLF#U0 support IEC 60730 functional safety compliance?

Yes, the R5F51105ADLF#U0 includes hardware features required for IEC 60730 Class B compliance, including a clock frequency accuracy measurement circuit (CAC), independent watchdog timer (IWDT) with dedicated 15 kHz oscillator, and built-in RAM test assist functions. These features enable runtime self-checks of clock integrity, program flow, and memory state - critical for household appliance and industrial control safety certification.

What package type and dimensions does the R5F51105ADLF#U0 use?

The R5F51105ADLF#U0 is supplied in the PWLG0064KA-A package: a 64-pin wafer-level chip-scale package (WFLGA) measuring 5 × 5 mm with 0.5 mm pitch. It features an exposed die pad on the bottom surface, which must be soldered to a VSS-connected thermal pad on the PCB for optimal thermal dissipation and electrical stability.

How many communication interfaces does the R5F51105ADLF#U0 integrate, and what are their capabilities?

The R5F51105ADLF#U0 integrates five communication channels: two SCI modules (SCI1 and SCI5) supporting asynchronous, clock-synchronous, I²C, and SPI modes; one I²C bus interface (RIIC) capable of 400 kbps fast-mode operation; and one RSPI interface supporting up to 16 Mbps master/slave transfers with 8–32 bit frame sizes and double-buffered operation. All interfaces share flexible pin mapping via the multi-function pin controller (MPC).

What are the low-power consumption characteristics of the R5F51105ADLF#U0?

The R5F51105ADLF#U0 offers three configurable low-power modes: software standby (0.35 µA typical), deep sleep, and sleep. Recovery from software standby takes only 4.8 µs, enabling rapid wake-up for event-driven operation. In active mode, supply current is 0.1 mA/MHz at 32 MHz, resulting in ~3.2 mA typical consumption - optimized for battery-powered and energy-harvesting applications requiring multi-year operational life.