Renesas R5F104EEANA#20

Overview

R5F104EEANA#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 at 1.6–5.5 V and delivering 44 DMIPS at 32 MHz. It integrates a 10-bit ADC (20 channels), RTC, UART/SPI/I²C interfaces, and ultra-low-power modes (0.60 μA in RTC+LVD mode) for battery-powered industrial sensor nodes and smart home controllers.

For engineers reviewing the R5F104EEANA#20 datasheet, R5F104EEANA#20 pinout, R5F104EEANA#20 application, or R5F104EEANA#20 equivalent, key selection criteria include its 40-pin 6×6 mm HWQFN package, 48 KB code flash with self-programming support, 10-bit ADC with internal temperature sensor, and dual UART/LIN capability for embedded control and telemetry systems.

Technical Context

The R5F104EEANA#20 implements the RL78 CPU core with a 3-stage pipeline, 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 comprises 48 KB on-chip flash (1 KB block size), 4 KB data flash with background operation (BGO), and 5.5 KB RAM.

Peripheral integration includes an Event Link Controller (ELC) for hardware-triggered peripheral chaining, Data Transfer Controller (DTC) with chain transfer, and configurable serial interfaces: up to 3 UART/LIN channels, 3 CSI (SPI-compatible) channels, and 4 I²C/simplified I²C channels - all accessible via flexible I/O redirection registers.

Key Specifications

Pinout & Package

Package: 40-pin HWQFN (6 × 6 mm, 0.5 mm pitch), exposed die pad recommended to be connected to VSS. Pin functions support multiplexing via Peripheral I/O Redirection Registers (PIOR0/1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104EGANA#20 and R5F104BEANA#20, the R5F104EEANA#20 delivers optimal balance of memory resources and power efficiency for mid-complexity embedded applications-offering sufficient flash for feature-rich firmware while maintaining lower unit cost than higher-density variants.

Availability

R5F104EEANA#20 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart home controllers, and portable medical devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R5F104EEANA#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, and power solutions for automotive, industrial, and IoT markets.

The RL78/G14 product line targets general-purpose embedded applications demanding ultra-low power, rich analog integration, and robust real-time control-designed specifically for cost-sensitive, battery-operated, and industrial edge devices.

FAQ

What is the maximum operating frequency and associated DMIPS rating for the R5F104EEANA#20?

The R5F104EEANA#20 operates at a maximum frequency of 32 MHz and delivers 44 DMIPS (Dhrystone MIPS) under those conditions. This performance level is achieved using the RL78 CPU core's 3-stage pipeline and high-speed on-chip oscillator. The R5F104EEANA#20 maintains consistent timing behavior across its supported voltage range (1.6–5.5 V) and temperature grade (-40 to +85°C).

Does the R5F104EEANA#20 include a built-in temperature sensor and what is its accuracy?

Yes, the R5F104EEANA#20 integrates an on-chip temperature sensor usable with the 10-bit ADC. It provides calibrated readings referenced to the internal 1.45 V bandgap voltage, enabling direct temperature measurement without external components. The sensor supports typical accuracy within ±3°C over the full operating range, as specified in the RL78/G14 datasheet. This functionality is accessible through dedicated ADC channels in the R5F104EEANA#20.

Can the R5F104EEANA#20 support LIN bus communication, and which peripheral handles it?

Yes, the R5F104EEANA#20 supports LIN bus communication via its integrated UART peripherals. Specifically, UART channels (e.g., UART0 on P50/P51 or UART2 on P13/P14) can be configured for LIN 2.2 protocol operation-including break detection, sync field handling, and checksum calculation-in firmware. No external LIN transceiver is required for basic node functionality, though one is needed for physical layer compliance in automotive networks. This capability is confirmed in the R5F104EEANA#20's peripheral specification table.

What package type and pin count does the R5F104EEANA#20 use, and is the exposed pad internally connected?

The R5F104EEANA#20 uses a 40-pin HWQFN package measuring 6 × 6 mm with 0.5 mm pitch and an exposed die pad. According to the official Renesas datasheet, the exposed pad is not electrically connected to any internal circuit but is thermally and mechanically tied to the die. It is strongly recommended to connect this pad to VSS (ground) on the PCB to improve thermal dissipation and electrical stability. This requirement is explicitly stated in the "Caution" notes for 40-pin HWQFN products in the R5F104EEANA#20 documentation.

How many rewrites are guaranteed for the data flash memory in the R5F104EEANA#20?

The data flash memory in the R5F104EEANA#20 is rated for 1,000,000 rewrite cycles (typical value) across its full operating voltage range (VDD = 1.8–5.5 V). This endurance specification applies to the 4 KB data flash block and is validated under standard industrial temperature conditions. The R5F104EEANA#20 supports background operation (BGO), allowing program execution from main flash memory while data flash is being rewritten-a key enabler for reliable field firmware updates.