Renesas R5F101FEAFP#10

Overview

R5F101FEAFP#10 from Renesas is a 44-pin LQFP-packaged RL78/G13 16-bit microcontroller with 64 KB flash, 4 KB data flash, 4 KB RAM, 32 MHz max CPU speed, and true low-power operation (66 μA/MHz active, 0.57 μA RTC+LVD). It targets battery-powered industrial sensors, smart metering interfaces, and embedded control systems requiring robust timing, analog sensing, and serial connectivity.

For engineers reviewing the R5F101FEAFP#10 datasheet, R5F101FEAFP#10 pinout, R5F101FEAFP#10 application, or R5F101FEAFP#10 equivalent, key selection criteria include its 44-pin LQFP-0.8 mm pitch package, absence of on-chip data flash (R5F101x series), -40°C to +85°C industrial temperature grade (D suffix), and integrated 10-bit ADC with 12-channel analog input support.

Technical Context

The R5F101FEAFP#10 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 μs (32 MHz high-speed mode) to 30.5 μs (32.768 kHz ultra-low-speed mode). Its memory subsystem includes 64 KB code flash (1 KB block size), 4 KB RAM, and no on-chip data flash-distinguishing it from R5F100x variants.

Peripheral integration includes one 12-bit interval timer, one real-time clock with calendar/alarm, eight 16-bit timers, up to ten I²C/Simplified I²C channels, four UART/LIN channels, two to eight CSI (SPI-compatible) channels, and an 8/10-bit A/D converter with internal 1.45 V reference and temperature sensor-enabling self-contained sensor node designs without external precision references.

Key Specifications

Pinout & Package

Package: 44-pin LQFP (10 × 10 mm, 0.8 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100FEAFP#10, the R5F101FEAFP#10 trades data flash persistence for simplified flash management and lower cost; versus R5F104FEAFP#10, it offers proven stability and reduced qualification effort for cost-sensitive volume production.

Availability

R5F101FEAFP#10 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering interfaces, and appliance control systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for R5F101FEAFP#10 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 is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The RL78/G13 family was designed for ultra-low-power general-purpose embedded control-balancing energy efficiency, peripheral richness, and toolchain maturity for rapid development of battery-operated and cost-sensitive devices.

FAQ

Does R5F101FEAFP#10 include on-chip data flash memory?

No, R5F101FEAFP#10 does not include on-chip data flash memory. The "101" in the part number explicitly denotes absence of data flash, unlike "100" variants (e.g., R5F100FEAFP#10) which integrate 4 KB. This simplifies flash programming workflows and reduces cost for applications that store configuration in external EEPROM or use code flash for parameter storage.

What is the maximum operating frequency and corresponding performance of R5F101FEAFP#10?

R5F101FEAFP#10 operates at up to 32 MHz, delivering 41 DMIPS of processing performance. This is achieved using the high-speed on-chip oscillator with ±1.0% accuracy across 1.8–5.5 V and –40°C to +85°C, enabling deterministic real-time response in motor control and sensor fusion applications without external crystal dependency.

Which analog features are supported by R5F101FEAFP#10's A/D converter?

R5F101FEAFP#10 integrates an 8/10-bit successive approximation A/D converter with up to 12 analog input channels, internal 1.45 V reference voltage, and on-chip temperature sensor. The ADC supports scan mode, window comparison, and conversion trigger via timer or external interrupt-making it suitable for standalone environmental monitoring without external references.

Is R5F101FEAFP#10 pin-compatible with other RL78/G13 44-pin LQFP variants?

Yes, R5F101FEAFP#10 shares identical 44-pin LQFP (10 × 10 mm, 0.8 mm pitch) mechanical and electrical pinout with all RL78/G13 44-pin LQFP members, including R5F100FAAFP#10 and R5F104FEAFP#10. This allows drop-in replacement during prototyping or migration-provided firmware accounts for differences in flash size, RAM layout, and peripheral enablement.

What low-power modes are available on R5F101FEAFP#10, and what is the lowest achievable current draw?

R5F101FEAFP#10 supports HALT, STOP, and SNOOZE modes. In STOP mode with only RTC and LVD active, it draws just 0.57 μA at VDD = 1.8–5.5 V and TA = –40°C to +85°C. This enables multi-year battery operation in wireless sensor nodes where periodic wake-up (e.g., every 30 seconds) suffices for data logging or transmission.