Renesas R5F101LJAFB#V0

Overview

R5F101LJAFB#V0 from Renesas is a 64-pin LFQFP-0.5mm-pitch 16-bit RL78/G13 microcontroller with 192 KB flash, 8 KB data flash, 16 KB RAM, 52-channel 10-bit ADC, and real-time clock - designed for low-power industrial control systems operating from 1.6 V to 5.5 V.

For engineers reviewing the R5F101LJAFB#V0 datasheet, R5F101LJAFB#V0 pinout, R5F101LJAFB#V0 application, or R5F101LJAFB#V0 equivalent, key selection criteria include ultra-low power consumption (66 μA/MHz active, 0.57 μA RTC+LVD mode), integrated LIN-capable UARTs, hardware multiplier/divider, and support for background data flash rewriting.

Technical Context

The R5F101LJAFB#V0 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 subsystem clock). It integrates dual DMA channels, 16-bit timer array (12 channels), and a calendar-mode real-time clock with alarm and correction functions.

Its peripheral set includes up to 10 I²C/Simplified I²C channels, 4 UART/LIN interfaces, 8 CSI/SPI channels, and a 12-bit interval timer - all configurable via on-chip SFRs without external components. Power management includes HALT, STOP, and SNOOZE modes with independent voltage detector (LVD) interrupt/reset levels.

Key Specifications

Pinout & Package

Package: 64-pin LFQFP (10 × 10 mm, 0.5 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 R5F101LJAFB#V0, the #X0 variant offers identical electrical and functional behavior in tape format for automated assembly, while the R5F101LKAFB#V0 provides scalable memory headroom for feature-rich firmware without changing PCB layout or peripheral configuration.

Availability

R5F101LJAFB#V0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC controllers, and programmable logic relays requiring stable component supply and long-term lifecycle assurance.

Supply support for R5F101LJAFB#V0 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, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The RL78/G13 product line delivers true low-power performance for general-purpose embedded applications - optimized for cost-sensitive, battery-operated, and thermally constrained industrial control systems.

FAQ

What is the maximum operating frequency and voltage range supported by the R5F101LJAFB#V0?

The R5F101LJAFB#V0 operates up to 32 MHz using its high-accuracy on-chip oscillator and supports a wide supply voltage range of 1.6 V to 5.5 V. Its ±1.0% oscillator accuracy over –20 to +85°C eliminates need for external crystal in many timing-critical applications, and the broad VDD range enables direct interfacing with diverse power domains including Li-ion, 3.3 V, and 5 V systems.

Does the R5F101LJAFB#V0 include data flash memory, and what are its endurance and voltage requirements?

Yes, the R5F101LJAFB#V0 includes 8 KB of on-chip data flash memory rated for 1,000,000 write/erase cycles (typical) and programmable at VDD = 1.8 V to 5.5 V. It supports background operation (BGO), allowing code execution from program memory while rewriting data flash - essential for robust firmware updates and nonvolatile parameter storage in mission-critical R5F101LJAFB#V0 deployments.

How many analog input channels does the R5F101LJAFB#V0 ADC support, and what resolution and references are available?

The R5F101LJAFB#V0 integrates a 10-bit successive-approximation ADC with up to 52 analog input channels. It supports internal 1.45 V reference voltage and an on-chip temperature sensor (usable only in HS mode), enabling accurate sensor measurements without external reference components. The ADC operates across the full 1.6–5.5 V supply range, maintaining linearity and monotonicity per specification.

What low-power modes are available on the R5F101LJAFB#V0, and what is the lowest achievable current draw?

The R5F101LJAFB#V0 supports HALT, STOP, and SNOOZE modes. In STOP mode with only RTC and LVD active, it draws just 0.57 μA - verified at VDD = 3.0 V and TA = 25°C. This ultra-low quiescent current enables decade-scale battery life in intermittently active applications such as wireless sensor nodes and energy harvesters, while retaining calendar timekeeping and brown-out detection.

Is the R5F101LJAFB#V0 pin-compatible with other RL78/G13 variants in the same 64-pin LFQFP package?

Yes, all RL78/G13 devices in the 64-pin LFQFP (FB) package - including R5F101LJAFB#V0, R5F101LKAFB#V0, and R5F101LLAFB#V0 - share identical pinouts and electrical characteristics. This allows hardware reuse across memory variants, simplifying design scalability and reducing qualification effort when upgrading flash/RAM capacity without modifying the PCB layout of the R5F101LJAFB#V0-based platform.