Renesas R5F104LKGFA#30

Overview

R5F104LKGFA#30 from Renesas is a 64-pin LQFP-0.65 mm pitch, industrial-grade (G: −40°C to +105°C) RL78/G14 16-bit MCU with 512 KB flash, 8 KB data flash, 24 KB RAM, 48 MHz max CPU speed, and integrated peripherals including 12-channel 10-bit ADC, dual DAC, RTC, and multiple serial interfaces (UART, I²C, CSI). It targets battery-powered industrial control and sensor nodes requiring ultra-low power operation (0.60 μA in STOP mode).

For engineers reviewing the R5F104LKGFA#30 datasheet, R5F104LKGFA#30 pinout, R5F104LKGFA#30 application, or R5F104LKGFA#30 equivalent, key selection criteria include its 512 KB code flash capacity, 64-pin LQFP-0.65 mm package with full peripheral I/O remapping, industrial temperature rating, and support for background data flash rewriting (BGO) at VDD = 1.8–5.5 V.

Technical Context

The R5F104LKGFA#30 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 µs (@32 MHz) to 30.5 µs (@32.768 kHz), and includes multiply/divide/accumulate instructions. Its memory subsystem integrates 512 KB on-chip flash with 1 KB block erase granularity and security lock, plus 8 KB data flash rated for 1,000,000 rewrite cycles.

Peripherals include a 12-channel 10-bit ADC with internal 1.45 V reference and temperature sensor, two 8-bit DACs with real-time output, 12× 16-bit timers (including TAU, Timer RJ/RD/RG), RTC with calendar/alarm/correction, and 7 serial interface channels (3× UART/LIN, 4× I²C/CSI). Event Link Controller (ELC) enables hardware-triggered peripheral chaining without CPU intervention.

Key Specifications

Pinout & Package

Package: 64-pin LQFP, 12 × 12 mm body, 0.65 mm pitch, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104LLGFA#30, the R5F104LKGFA#30 offers guaranteed operation up to +105°C for demanding thermal environments; compared with R5F104LKAFB#30, it provides easier hand-soldering and test access due to larger 0.65 mm pitch and 12 × 12 mm body, improving yield in medium-volume production.

Availability

R5F104LKGFA#30 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and energy metering front-ends requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for R5F104LKGFA#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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G14 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and thermally demanding industrial applications-balancing performance, integration, and energy efficiency.

FAQ

What is the maximum operating frequency and corresponding instruction timing for the R5F104LKGFA#30?

The R5F104LKGFA#30 supports a maximum CPU clock of 32 MHz (with high-speed on-chip oscillator) and 48 MHz (via PLL from 8 MHz external source). At 32 MHz, the minimum instruction execution time is 0.03125 µs. The RL78 core allows dynamic switching between high-speed and ultra-low-speed modes (e.g., 32.768 kHz for RTC), enabling adaptive power/performance trade-offs in the R5F104LKGFA#30.

Does the R5F104LKGFA#30 support background data flash rewriting (BGO), and what are the voltage requirements?

Yes, the R5F104LKGFA#30 supports Background Operation (BGO) for data flash rewriting, allowing program execution from code flash while concurrently writing to data flash. Rewriting is supported across the full VDD range of 1.8 V to 5.5 V, and the data flash is rated for 1,000,000 write/erase cycles. This capability is essential for reliable firmware updates and parameter storage in the R5F104LKGFA#30 without halting application logic.

How many analog input channels and what ADC resolution does the R5F104LKGFA#30 provide?

The R5F104LKGFA#30 integrates a 10-bit successive approximation ADC with up to 12 analog input channels (ANI0–ANI11, plus ANI16–ANI19 depending on pin mapping). It includes an internal 1.45 V reference voltage and an on-die temperature sensor, enabling accurate sensor signal acquisition and thermal compensation without external components in the R5F104LKGFA#30.

What is the purpose of the REGC pin on the R5F104LKGFA#30, and how must it be connected?

The REGC pin on the R5F104LKGFA#30 connects to the internal voltage regulator's stabilization capacitor. It must be connected to VSS via a 0.47 µF to 1.0 µF ceramic capacitor placed as close as possible to the pin. Failure to properly decouple REGC risks unstable internal regulation, leading to erratic reset behavior or flash programming errors in the R5F104LKGFA#30.

Can the R5F104LKGFA#30 operate without an external crystal, and what is the accuracy of its on-chip oscillator?

Yes, the R5F104LKGFA#30 can operate entirely from its high-accuracy on-chip oscillator, selectable from 1 MHz to 64 MHz. At 32 MHz, the oscillator achieves ±1.0% accuracy across VDD = 1.8–5.5 V and TA = −20°C to +85°C. For RTC-critical applications, a 32.768 kHz crystal is still recommended on X1/X2, but general-purpose timing and communication (e.g., UART baud generation) function reliably using the on-chip oscillator in the R5F104LKGFA#30.