Renesas R5F104GFGNA#20

Overview

R5F104GFGNA#20 from Renesas is a 48-pin HWQFN-packaged 16-bit RL78/G14 microcontroller with 96 KB flash, 12 KB RAM, and 8 KB data flash, operating from 1.6–5.5 V at -40 to +105°C (industrial G-grade). It delivers 44 DMIPS at 32 MHz, features ultra-low-power HALT/STOP/SNOOZE modes (0.60 μA RTC+LVD), and integrates 10-bit ADC (16 ch), UART/SCI/I²C interfaces, RTC, and on-chip debug.

For engineers reviewing the R5F104GFGNA#20 datasheet, R5F104GFGNA#20 pinout, R5F104GFGNA#20 application, or R5F104GFGNA#20 equivalent, key selection criteria include industrial temperature support, integrated data flash rewrite capability (1M cycles), low-voltage operation down to 1.6 V, and hardware event linking via ELC for deterministic peripheral coordination.

Technical Context

The R5F104GFGNA#20 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). Its Event Link Controller (ELC) enables direct hardware-triggered peripheral activation without CPU intervention across up to 26 event sources.

Power management includes on-chip POR, 14-level LVD with interrupt/reset options, and multiple low-power modes coordinated by dedicated clock control logic. The high-accuracy ±1.0% on-chip oscillator (64–1 MHz selectable) eliminates external crystal requirements for many timing-critical embedded applications.

Key Specifications

Pinout & Package

48-pin HWQFN (7 × 7 mm, 0.5 mm pitch) with exposed die pad recommended to be connected to VSS for thermal and electrical stability. REGC requires 0.47–1 µF capacitor to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104GFGNA#20, R5F104GGFNA#20 offers 33% more flash for protocol stack expansion, while R5F104GJFNA#20 adds 67% more RAM for real-time signal buffers - both retain identical pinout, peripherals, and low-power behavior, enabling scalable design reuse.

Availability

R5F104GFGNA#20 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, building automation sensor nodes, and portable medical monitors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F104GFGNA#20 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 targets cost-sensitive, ultra-low-power general-purpose embedded applications requiring robust industrial qualification, integrated analog peripherals, and simplified development with scalable memory options.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104GFGNA#20?

The R5F104GFGNA#20 operates at up to 32 MHz with a measured performance of 44 DMIPS. This rating is achieved using the RL78 CPU core's 3-stage pipeline and optimized instruction set, including multiply/divide operations. The high-speed on-chip oscillator supports this frequency without external components, and the device maintains full functionality across its entire 1.6–5.5 V supply range and -40 to +105°C temperature envelope.

Does the R5F104GFGNA#20 support background data flash rewriting while executing application code?

Yes, the R5F104GFGNA#20 supports Background Operation (BGO) for data flash rewriting. While the 8 KB data flash is being rewritten, the CPU can continue executing instructions from code flash memory. This capability enables seamless firmware parameter updates, event logging, or calibration storage without interrupting real-time tasks - critical for industrial controllers and medical devices requiring continuous operation.

What are the key low-power modes available on the R5F104GFGNA#20 and their typical current consumption?

The R5F104GFGNA#20 provides HALT, STOP, and SNOOZE modes. In STOP mode with only RTC and LVD active, it draws 0.60 μA (typical); HALT mode consumes 66 μA/MHz (e.g., ~2.1 μA at 32 MHz). SNOOZE mode allows selected peripherals (e.g., ADC, UART) to operate while CPU sleeps, reducing average power in duty-cycled sensor applications. All modes retain RAM content and support fast wake-up via interrupts or RTC alarm.

How many analog input channels and what ADC resolution does the R5F104GFGNA#20 provide?

The R5F104GFGNA#20 integrates a 10-bit successive-approximation ADC with up to 16 analog input channels (ANI0–ANI15 mapped across P20–P27 and other pins). It includes an internal 1.45 V reference voltage and on-die temperature sensor, enabling accurate voltage and thermal measurements without external references. Conversion time is programmable, and results are accessible via DMA or CPU read for real-time control loops.

Is the R5F104GFGNA#20 pin-compatible with other RL78/G14 variants in the same 48-pin HWQFN package?

Yes, all RL78/G14 devices in the 48-pin HWQFN package (including R5F104GFGNA#20, R5F104GGFNA#20, and R5F104GJFNA#20) share identical pinouts, electrical characteristics, and peripheral mappings. Differences are limited to flash/RAM capacity and factory-programmed features - enabling drop-in upgrades during design iteration or production ramp without PCB changes.