Renesas R5F104GEAFB#X0

Overview

R5F104GEAFB#X0 from Renesas Electronics is a 48-pin LFQFP (7 × 7 mm, 0.5 mm pitch), industrial-grade RL78/G14 16-bit microcontroller with 48 KB flash, 5.5 KB RAM, and 4 KB data flash. It operates from 1.6–5.5 V, delivers 44 DMIPS at 32 MHz, and supports ultra-low-power modes (66 μA/MHz active, 0.60 μA RTC+LVD). It targets battery-powered industrial sensors and smart metering interfaces requiring integrated analog peripherals and secure firmware updates.

For engineers reviewing the R5F104GEAFB#X0 datasheet, R5F104GEAFB#X0 pinout, R5F104GEAFB#X0 application, or R5F104GEAFB#X0 equivalent, key selection criteria include its 48-pin LFQFP-0.5 mm package, 48 KB code flash with self-programming and boot swap, dual 10-bit ADC (20-channel), real-time clock with calendar, and LIN-capable UART channels for robust fieldbus communication in constrained environments.

Technical Context

The R5F104GEAFB#X0 implements the RL78 CPU core-a CISC architecture with 3-stage pipeline and configurable instruction timing (0.03125 μs @ 32 MHz to 30.5 μs @ 32.768 kHz). It integrates a Data Transfer Controller (DTC) for autonomous memory transfers triggered by interrupts and an Event Link Controller (ELC) enabling hardware-level peripheral event chaining without CPU intervention.

Its analog subsystem includes two independent 10-bit A/D converters (up to 20 total input channels), an 8-bit D/A converter (2-channel output), and two comparators with selectable reference sources (internal 1.45 V or external). The on-chip high-accuracy oscillator offers ±1.0% stability across –40°C to +105°C, eliminating need for external crystals in many applications.

Key Specifications

Pinout & Package

Package: 48-pin LFQFP (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, industrial-grade (G-field), tape-and-reel packaging (#X0).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F104GEAFB#X0, both alternatives share identical flash/RAM/ADC/peripheral configuration and industrial temperature rating, differing solely in packaging format-making them functionally interchangeable where mechanical handling and reel compatibility permit.

Availability

R5F104GEAFB#X0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering interfaces, and home appliance control systems requiring stable component supply across extended product lifecycles.

Supply support for R5F104GEAFB#X0 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 industrial, automotive, and IoT markets.

The RL78/G14 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and industrial control applications demanding high integration, security, and long-term supply assurance.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F104GEAFB#X0?

The R5F104GEAFB#X0 operates at up to 32 MHz, delivering 44 DMIPS of processing performance. Its RL78 CPU core achieves this with a 3-stage pipeline and supports configurable instruction timing - from 0.03125 μs at full speed to 30.5 μs in ultra-low-speed mode using the 32.768 kHz subsystem clock. This flexibility allows the R5F104GEAFB#X0 to balance real-time responsiveness with energy efficiency in diverse embedded roles.

Does the R5F104GEAFB#X0 support in-system programming and secure firmware updates?

Yes, the R5F104GEAFB#X0 supports full in-system programming via its on-chip debug interface and self-programming flash functionality. It includes boot swap capability and flash shield window protection to prevent unauthorized access during updates. The 48 KB code flash allows dual-image storage, enabling fail-safe over-the-air or field firmware upgrades - a key requirement for deployed R5F104GEAFB#X0-based industrial controllers.

What analog peripherals are integrated into the R5F104GEAFB#X0?

The R5F104GEAFB#X0 integrates dual 10-bit A/D converters supporting up to 20 analog input channels, an 8-bit D/A converter with up to two output channels, two analog comparators with selectable internal (1.45 V) or external reference, and an on-die temperature sensor. These peripherals are fully operational across the full 1.6–5.5 V supply range and –40°C to +105°C temperature range, making the R5F104GEAFB#X0 suitable for precision sensing without external signal conditioning.

Is the R5F104GEAFB#X0 pin-compatible with other RL78/G14 variants in the same package?

Yes - all RL78/G14 devices in the 48-pin LFQFP-0.5 mm package (e.g., R5F104GKAFB, R5F104GLAFB, R5F104GEAFB) share identical pinouts and electrical characteristics. This allows hardware reuse across memory variants: designers can scale flash (48–384 KB) and RAM (5.5–32 KB) without modifying the PCB layout, simplifying platform development for the R5F104GEAFB#X0 and related members.

What is the purpose of the REGC pin on the R5F104GEAFB#X0, and how must it be connected?

The REGC pin on the R5F104GEAFB#X0 is the regulator bypass capacitor terminal for the on-chip voltage regulator. 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 voltage regulation, leading to erratic reset behavior, flash programming errors, or degraded ADC accuracy - all verified failure modes documented in the R5F104GEAFB#X0 hardware design guidelines.