Renesas R5F104GFAFB#X0

Overview

R5F104GFAFB#X0 from Renesas is a 48-pin LFQFP, 0.5 mm pitch, industrial-grade (G) RL78/G14 16-bit MCU with 96 KB flash, 12 KB RAM, and 8 KB data flash, operating from 1.6–5.5 V at −40 to +105°C. It delivers 44 DMIPS at 32 MHz, features ultra-low power consumption (66 μA/MHz active, 0.60 μA in RTC+LVD mode), and integrates UART, I²C, SPI, 16-bit timers, 10-bit ADC (16 ch), and RTC with calendar.

For engineers reviewing the R5F104GFAFB#X0 datasheet, R5F104GFAFB#X0 pinout, R5F104GFAFB#X0 application, or R5F104GFAFB#X0 equivalent, key selection criteria include its industrial temperature rating, LFQFP-48 package compatibility, integrated data flash with 1M rewrite cycles, low-power real-time clock operation, and peripheral flexibility for sensor interface, motor control, and battery-powered HMI designs.

Technical Context

The R5F104GFAFB#X0 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 on-chip debug, self-programming with boot swap, and background operation during data flash rewriting.

Its mixed-signal subsystem includes a 10-bit ADC with internal 1.45 V reference and temperature sensor, dual-channel 8-bit DAC with real-time output, two comparators (selectable reference), and event-driven peripherals coordinated via ELC and DTC-enabling deterministic low-latency response without CPU intervention.

Key Specifications

Pinout & Package

Package: 48-pin LFQFP, 7 mm × 7 mm, 0.5 mm pitch, exposed pad not present (non-HWQFN). 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 16-bit MCU applications.

Compared with R5F104GFAFB#X0, R5F104GGAFB#X0 offers 33% more flash for feature-rich firmware while maintaining identical pinout and power profile; R5F104GHAFB#X0 further increases RAM by 67%, enabling richer multitasking but with marginally higher active current.

Availability

R5F104GFAFB#X0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and medical infusion pumps requiring stable component supply across extended product lifecycles.

Supply support for R5F104GFAFB#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, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G14 product line targets cost-sensitive, ultra-low-power general-purpose embedded systems - balancing performance, integration, and energy efficiency for battery-operated and thermally constrained applications.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F104GFAFB#X0?

The R5F104GFAFB#X0 operates at up to 32 MHz, delivering 44 DMIPS of processing performance. This speed is achieved using the high-speed on-chip oscillator with ±1.0% accuracy across 1.8–5.5 V and −20 to +85°C. The R5F104GFAFB#X0 supports dynamic clock switching to lower frequencies (e.g., 32.768 kHz) for ultra-low-power RTC operation without sacrificing timing precision.

Does the R5F104GFAFB#X0 support in-system programming and secure firmware updates?

Yes, the R5F104GFAFB#X0 supports full in-system programming via its on-chip debug interface and includes flash shield window functionality to prevent unauthorized readout. It enables secure firmware updates through self-programming with boot swap capability - allowing validated new firmware to be written to a secondary bank while the primary bank remains operational, then atomically switching execution upon verification.

What analog peripherals are integrated into the R5F104GFAFB#X0, and how are they calibrated?

The R5F104GFAFB#X0 integrates a 10-bit ADC with 16 input channels, an 8-bit DAC with up to two outputs, two comparators, and an on-chip temperature sensor. ADC offset/gain calibration is supported via factory-trimmed values stored in ROM, accessible through the flash library API. The internal 1.45 V reference is used for both ADC and comparator operation, eliminating need for external references in most precision sensing applications.

How does the R5F104GFAFB#X0 manage power in battery-operated applications?

The R5F104GFAFB#X0 achieves industry-leading low-power operation: 66 μA/MHz in active mode and just 0.60 μA in STOP mode with RTC and LVD enabled. It supports three low-power modes - HALT (CPU stopped, peripherals active), STOP (all clocks halted except sub-system clock), and SNOOZE (selected peripherals active while CPU sleeps). Wake-up sources include RTC alarm, external interrupts, and serial reception - enabling responsive yet energy-efficient operation.

Is the R5F104GFAFB#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 - including R5F104GFAFB#X0, R5F104GGAFB#X0, and R5F104GHAFB#X0 - share identical pinouts and electrical characteristics. This allows direct hardware reuse across memory variants, simplifying design scalability and inventory management. Peripheral function assignment is managed via software-configurable PIOR registers, ensuring consistent layout across firmware versions.