Renesas R5F104EFGNA#20

Overview

R5F104EFGNA#20 from Renesas is a 40-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 (G-grade). It delivers 44 DMIPS at 32 MHz, features ultra-low-power HALT/STOP/SNOOZE modes (66 μA/MHz active, 0.60 μA RTC+LVD), and integrates UART, I²C, SPI, 16-bit timers, 10-bit ADC (16 ch), and RTC for industrial control and sensor interface applications.

For engineers reviewing the R5F104EFGNA#20 datasheet, R5F104EFGNA#20 pinout, R5F104EFGNA#20 application, or R5F104EFGNA#20 equivalent, key selection criteria include its G-grade temperature rating, 40-pin 6×6 mm HWQFN package with exposed pad, integrated data flash rewrite capability (1M cycles), and support for background operation during flash programming.

Technical Context

The R5F104EFGNA#20 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and configurable instruction timing (0.03125 µs @ 32 MHz to 30.5 µs @ 32.768 kHz). It supports multiply/divide/accumulate instructions and 1 MB address space.

Its peripheral set includes 16-bit Timer Array Unit (TAU) with up to 8 channels, 12-bit interval timer, calendar RTC with alarm/correction, 10-bit ADC with internal reference (1.45 V) and temperature sensor, and Event Link Controller (ELC) enabling hardware-triggered peripheral chaining without CPU intervention.

Key Specifications

Pinout & Package

Package: 40-pin HWQFN (6 × 6 mm, 0.5 mm pitch) with exposed die pad recommended to be connected to VSS for thermal and EMI performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104EFGNA#20, R5F104EGGNA#20 provides scalable memory for future firmware growth, while R5F104FDGNA#20 offers a leaner, lower-cost option for fixed-function implementations - both share identical pinout, peripheral set, and G-grade qualification.

Availability

R5F104EFGNA#20 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, automotive body electronics, and home appliance control requiring stable component supply across extended temperature ranges.

Supply support for R5F104EFGNA#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 applications requiring robust peripheral integration and long-term supply stability - especially where extended temperature operation and flash endurance are critical.

FAQ

What is the maximum operating frequency and processing performance of the R5F104EFGNA#20?

The R5F104EFGNA#20 operates at up to 32 MHz and delivers 44 DMIPS of processing performance. This is achieved using the RL78 CPU core's 3-stage pipeline and optimized instruction set, enabling deterministic execution of real-time control algorithms such as PID loops and sensor fusion within tight timing budgets.

Does the R5F104EFGNA#20 support in-system programming and secure firmware updates?

Yes, the R5F104EFGNA#20 supports self-programming with boot swapping and flash shield window protection. This allows safe firmware updates by maintaining a validated backup image while writing new code to the active bank, preventing corruption during power loss - a key requirement for remote or unattended devices.

What are the low-power capabilities of the R5F104EFGNA#20, and how do they benefit battery-operated designs?

The R5F104EFGNA#20 achieves 66 μA/MHz in HALT mode and just 0.60 μA in STOP mode with only RTC and LVD active. These ultra-low quiescent currents significantly extend battery life in intermittently active applications like wireless sensors, enabling multi-year operation on coin-cell batteries without compromising real-time wake-up responsiveness.

How does the R5F104EFGNA#20 handle analog signal acquisition, and what ADC resources are available?

The R5F104EFGNA#20 integrates a 10-bit successive-approximation ADC with up to 16 input channels, internal 1.45 V reference, and on-chip temperature sensor. Its design supports simultaneous sampling and conversion with minimal CPU overhead, making it suitable for precision monitoring of motor currents, battery voltages, and environmental parameters.

Is the R5F104EFGNA#20 pin-compatible with other RL78/G14 variants in the same package?

Yes, all RL78/G14 devices in the 40-pin HWQFN package - including R5F104EFGNA#20, R5F104EGGNA#20, and R5F104FDGNA#20 - share identical pinouts and electrical characteristics. This enables seamless memory-scaling upgrades or downgrades without PCB redesign, provided peripheral usage aligns with the selected variant's feature set.