Renesas R5F104LDAFB#X0

Overview

R5F104LDAFB#X0 from Renesas is a 64-pin LFQFP (10 × 10 mm, 0.5 mm pitch), industrial-grade RL78/G14 16-bit MCU with 32 KB flash, 4 KB data flash, and 4 KB RAM, operating from 1.6–5.5 V at –40 to +85°C. It delivers 44 DMIPS at 32 MHz, integrates a real-time clock, 10-bit ADC (16 channels), UART/SPI/I²C interfaces, and ultra-low-power HALT/STOP/SNOOZE modes-used in battery-powered industrial sensors and smart metering endpoints.

For engineers reviewing the R5F104LDAFB#X0 datasheet, R5F104LDAFB#X0 pinout, R5F104LDAFB#X0 application, or R5F104LDAFB#X0 equivalent, key selection criteria include its 64-pin LFQFP-0.5mm package, 32 KB code flash with self-programming, 10-bit ADC with internal reference, RTC calendar function, and support for LIN-bus UART - all validated for industrial ambient operation without external crystal dependency.

Technical Context

The R5F104LDAFB#X0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 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 19–26 event sources via the Event Link Controller (ELC), enabling low-CPU-overhead peripheral coordination.

Its power management includes on-chip POR and LVD with 14 selectable voltage detection levels, plus ultra-low-power STOP mode (0.60 μA with RTC + LVD active). The high-speed on-chip oscillator supports 12 selectable frequencies (1–64 MHz) with ±1.0% accuracy across full voltage and temperature range.

Key Specifications

Pinout & Package

Package: 64-pin LFQFP (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3. Pin 1 marked with dot; exposed pad not present (unlike HWQFN variants).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104LDAFB#X0, the R5F104LEAFB#X0 offers 50% more flash and +37.5% RAM within identical footprint and power profile, while R5F104LGAFB#X0 adds functional headroom for multi-protocol gateways - all three share identical LFQFP-64 pin mapping and industrial temperature rating.

Availability

R5F104LDAFB#X0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, and home appliance controllers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F104LDAFB#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 industrial, automotive, and IoT markets.

The RL78/G14 product line targets cost-sensitive, ultra-low-power general-purpose applications - designed to replace legacy 8-bit MCUs with enhanced performance, integrated peripherals, and robust industrial qualification.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104LDAFB#X0?

The R5F104LDAFB#X0 achieves a maximum operating frequency of 32 MHz using its high-speed on-chip oscillator, delivering 44 DMIPS (Dhrystone MIPS) performance. This is confirmed in the RL78/G14 datasheet Rev. 3.40, Section 1.1, and applies directly to the R5F104LDAFB#X0 variant with its 32 KB flash configuration and industrial-grade timing characteristics.

Does the R5F104LDAFB#X0 support hardware LIN bus communication?

Yes, the R5F104LDAFB#X0 supports hardware LIN bus communication via its UART peripheral, which includes dedicated LIN-mode features such as automatic sync-break detection, checksum generation, and identifier filtering per ISO 17987. This capability is documented in Section 1.1 "Serial Interfaces" of the R01DS0053EJ0340 datasheet and applies to all RL78/G14 devices including the R5F104LDAFB#X0.

What is the flash memory organization and write endurance specification for the R5F104LDAFB#X0?

The R5F104LDAFB#X0 contains 32 KB of code flash memory organized in 1 KB blocks, and 4 KB of data flash memory rated for 1,000,000 write/erase cycles (typical). Both memories support background operation (BGO), allowing program execution during data flash rewriting. These values are specified in Table "ROM, RAM capacities" on page 2 of R01DS0053EJ0340 and apply specifically to the R5F104LDAFB#X0's "LD" flash capacity code.

Can the R5F104LDAFB#X0 operate without an external crystal?

Yes, the R5F104LDAFB#X0 can operate entirely without an external crystal, using its high-accuracy on-chip oscillator (±1.0% from –20 to +85°C) for main system clock and its dedicated low-speed on-chip oscillator for watchdog and STOP-mode RTC. External crystals are optional - only required if higher timing precision (e.g., <±100 ppm) or specific frequency synthesis is needed beyond the 12 factory-calibrated on-chip frequencies.

What is the meaning of the "D" suffix and "#X0" packaging code in R5F104LDAFB#X0?

The "D" in R5F104LDAFB#X0 indicates industrial temperature grade (–40°C to +85°C), while "#X0" specifies embossed tape packaging for LFQFP packages per Renesas ordering conventions. This matches Table 1-1 (page 5) of R01DS0053EJ0340, where "#X0" is explicitly assigned to LFQFP/LQFP/LSSOP tape-and-reel formats - confirming R5F104LDAFB#X0 is supplied in tape for automated SMT placement.