Renesas R5F51101ADFL#30

Overview

R5F51101ADFL#30 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 R5F51101ADFL#30 datasheet, R5F51101ADFL#30 pinout, R5F51101ADFL#30 application, or R5F51101ADFL#30 equivalent, key selection criteria include its 48-pin LFQFP package, −40°C to +85°C temperature grade, software standby mode (0.35 μA), 1.8–3.6 V supply range, and integrated IEC 60730 safety support functions.

Technical Context

The R5F51101ADFL#30 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 high-speed (32 MHz ±1%), sub-clock (32.768 kHz), and IWDT-dedicated (15 kHz) oscillators, all managed via independent clock domain controls (ICLK, PCLK, FCLK).

Peripheral integration centers on deterministic real-time I/O: MTU2 timer unit (4-channel 16-bit PWM/input capture), CMT (2-channel compare match), RSPI (16 Mbps master/slave), RIIC (400 kbps I²C/SMBus), and SCIe/SCIf supporting asynchronous, clock-synchronous, simple I²C, and simple SPI modes - all configurable via Multi-function Pin Controller (MPC).

Key Specifications

Pinout & Package

Package: PLQP0048KB-A, 48-pin LFQFP, 7 × 7 mm, 0.5 mm pitch, exposed pad not specified - compatible with standard reflow profiles and mid-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F51101ADFL#30, the R5F51101ADFM#30 offers expanded I/O and A/D resources in a larger footprint, while R5F51103ADFL#30 retains identical pinout and peripherals but doubles flash for more complex firmware - both serve distinct scalability paths without architectural change.

Availability

R5F51101ADFL#30 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC actuators, energy meter interface modules, and IEC 60730-certified appliance controls requiring stable component supply across extended product lifecycles.

Supply support for R5F51101ADFL#30 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, and power solutions for industrial, automotive, and IoT markets.

The RX110 Group, including R5F51101ADFL#30, was designed for cost-sensitive, low-power embedded applications demanding real-time responsiveness, functional safety support, and compact footprint - targeting sensor hubs, white goods, and building automation.

FAQ

What is the maximum operating frequency and power supply range for the R5F51101ADFL#30?

The R5F51101ADFL#30 operates at a maximum frequency of 32 MHz and supports a supply voltage range of 1.8 V to 3.6 V. Its operating frequency scales with VCC: 8 MHz at 1.8–2.4 V, 16 MHz at 2.4–2.7 V, and full 32 MHz above 2.7 V. This adaptive voltage-frequency relationship optimizes power efficiency across varying rail conditions while maintaining deterministic timing in the R5F51101ADFL#30.

Does the R5F51101ADFL#30 include hardware support for functional safety standards like IEC 60730?

Yes, the R5F51101ADFL#30 integrates dedicated hardware for IEC 60730 Class B compliance, including a Clock Frequency Accuracy Measurement Circuit (CAC), Independent Watchdog Timer (IWDT) with dedicated 15 kHz oscillator, and RAM test assist functions. These features enable runtime verification of clock integrity, fault detection, and memory initialization - critical for certified appliance control where the R5F51101ADFL#30 serves as the primary safety monitor.

How many A/D converter channels does the R5F51101ADFL#30 support, and what is the minimum conversion time?

The R5F51101ADFL#30 includes a 12-bit S12AD converter with 10 input channels and a minimum conversion time of 1.0 µs when ADCLK runs at 32 MHz. This performance enables high-speed sampling for closed-loop control or waveform capture. The R5F51101ADFL#30 also supports double-trigger mode for synchronized sampling - a key capability for accurate phase measurement in motor or power applications.

What communication interfaces are available on the R5F51101ADFL#30, and how are they distributed across pins?

The R5F51101ADFL#30 provides SCIe ×2 (channels 1 and 5), SCIf ×1 (channel 12), RIIC ×1, and RSPI ×1 - all accessible via the 48-pin LFQFP package. SCI1/SCI5 share pins with MTU2 timers and general I/O, while SCIf12 and RSPI use dedicated signal lines (e.g., SCK12, RSPCKA). Pin multiplexing is managed through the Multi-function Pin Controller (MPC), allowing flexible allocation of these interfaces in the R5F51101ADFL#30 design.

What package type and thermal specifications apply to the R5F51101ADFL#30?

The R5F51101ADFL#30 is supplied in the PLQP0048KB-A package: a 48-pin LFQFP, 7 × 7 mm body, 0.5 mm pitch, with no exposed thermal pad specified. It is rated for operation from −40°C to +85°C (industrial grade), and its thermal resistance (θ_JA) is optimized for standard PCB layouts using typical copper pour. This package balances compactness, manufacturability, and thermal performance in the R5F51101ADFL#30's target applications.