Renesas R5F104ECGNA#20

Overview

R5F104ECGNA#20 from Renesas is a 40-pin HWQFN-packaged 16-bit RL78/G14 microcontroller with 48 KB flash, 5.5 KB RAM, and 4 KB data flash, operating from 1.6–5.5 V at -40 to +105°C (industrial G-grade), delivering 44 DMIPS at 32 MHz for low-power embedded control in motor drives, sensor nodes, and industrial HMI.

For engineers reviewing the R5F104ECGNA#20 datasheet, R5F104ECGNA#20 pinout, R5F104ECGNA#20 application, or R5F104ECGNA#20 equivalent, key selection criteria include its 40-pin 6×6 mm HWQFN-0.5 mm pitch package, integrated RTC+LVD+DTC+ELC, and support for UART/LIN, I²C, CSI, and 10-channel 10-bit ADC - all critical for space-constrained, battery-aware designs requiring high peripheral integration and thermal robustness.

Technical Context

The R5F104ECGNA#20 implements the RL78 CPU core with 3-stage pipeline, supporting instruction execution times from 0.03125 µs (32 MHz) to 30.5 µs (32.768 kHz), plus multiply/divide/accumulate instructions and 1 MB address space. It integrates a 12-bit interval timer, real-time clock with calendar/alarm, and watchdog timer with dedicated low-speed oscillator.

Its peripheral set includes up to 10-channel 10-bit ADC with internal 1.45 V reference and temperature sensor, two 8-bit DAC channels, two comparators, and serial interfaces: 3–4 UART/LIN channels, 4–10 I²C/simplified I²C channels, and 3–8 CSI (SPI-compatible) channels - all configurable via Event Link Controller (ELC) for hardware-triggered event chaining without CPU intervention.

Key Specifications

Pinout & Package

Package: 40-pin HWQFN (6 × 6 mm, 0.5 mm pitch), exposed die pad recommended to be connected to VSS. Compliant with JEDEC MO-220, RoHS and MSL Level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104EDGNA#20 and R5F104EGGNA#20, the R5F104ECGNA#20 provides optimal balance of cost, footprint, and resource allocation for fixed-function industrial controls where 48 KB flash and 5.5 KB RAM suffice - avoiding over-provisioning while maintaining full peripheral compatibility and thermal rating.

Availability

R5F104ECGNA#20 is available at Aetrix Electronics and suitable for industrial motor drives, smart appliance HMIs, battery-powered sensor nodes, and DIN-rail PLC modules requiring stable component supply across extended product lifecycles.

Supply support for R5F104ECGNA#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 family targets cost-sensitive, ultra-low-power general-purpose embedded applications - emphasizing energy efficiency, peripheral integration, and industrial-grade reliability in compact packages like the R5F104ECGNA#20.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F104ECGNA#20?

The R5F104ECGNA#20 operates up to 32 MHz using its high-speed on-chip oscillator, delivering 44 DMIPS. Its minimum instruction execution time is 0.03125 µs at this frequency, and it supports dynamic clock scaling down to 32.768 kHz (30.5 µs/instruction) for ultra-low-power RTC operation - all within the same R5F104ECGNA#20 device without external components.

Does the R5F104ECGNA#20 support LIN bus communication, and how is it implemented?

Yes, the R5F104ECGNA#20 supports LIN bus communication via its UART peripherals (channels 0–3), with built-in LIN-specific features including automatic sync field detection, checksum calculation, and break signal generation. The UART's LIN mode is configured through dedicated control registers, and the R5F104ECGNA#20's ELC can trigger LIN frame transmission upon timer or GPIO events - eliminating software overhead.

What are the data flash endurance and voltage requirements for rewriting the R5F104ECGNA#20?

The R5F104ECGNA#20 includes 4 KB of data flash rated for 1,000,000 write/erase cycles (typical). Rewriting is supported across the full operating voltage range of 1.8–5.5 V, and background operation (BGO) allows CPU code execution from program flash during data flash writes - a capability confirmed in the R5F104ECGNA#20's flash library documentation and verified in its R01DS0053EJ0370 datasheet.

How does the R5F104ECGNA#20 achieve its 0.60 μA STOP mode current specification?

The R5F104ECGNA#20 achieves 0.60 μA in STOP mode by powering down the CPU core, flash, RAM, and most peripherals while retaining only the real-time clock (RTC), low-voltage detector (LVD), and associated wakeup logic. This state is entered via software command and exited by RTC alarm, LVD event, or external interrupt - all validated for the R5F104ECGNA#20 under -40 to +105°C conditions per its G-grade industrial specification.

Can the R5F104ECGNA#20's analog-to-digital converter use an internal reference voltage, and what is its accuracy?

Yes, the R5F104ECGNA#20's 10-bit ADC supports an internal 1.45 V reference voltage, specified with ±3% accuracy over temperature and supply voltage. This eliminates the need for external reference components in cost-sensitive applications like thermostat sensing or basic power monitoring - a feature explicitly documented for the R5F104ECGNA#20 in Section 1.1 "Features" of its official datasheet R01DS0053EJ0370.