Renesas R5F104BEANA#20

Overview

R5F104BEANA#20 from Renesas is a 32-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 +85°C (A-grade), delivering 44 DMIPS at 32 MHz for low-power industrial control and sensor interface applications.

For engineers reviewing the R5F104BEANA#20 datasheet, R5F104BEANA#20 pinout, R5F104BEANA#20 application, or R5F104BEANA#20 equivalent, key selection criteria include its 32-pin 5×5 mm HWQFN package, integrated 10-bit 16-channel ADC, real-time clock with calendar function, and ultra-low-power STOP mode consuming just 0.60 μA with RTC + LVD active.

Technical Context

The R5F104BEANA#20 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 µs (32 MHz high-speed oscillator) to 30.5 µs (32.768 kHz subsystem clock). It integrates a Data Transfer Controller (DTC) for autonomous memory transfers triggered by 19–26 event sources via the Event Link Controller (ELC).

Peripheral integration includes up to 12 × 16-bit timers (TAU, RJ, RD, RG), 3–4 UART/LIN channels, 4–10 I²C interfaces, and 3–8 CSI/SPI channels - all configurable via peripheral I/O redirection registers (PIOR0/1) to support flexible pin assignment without PCB redesign.

Key Specifications

Pinout & Package

32-pin plastic HWQFN (5 × 5 mm, 0.5 mm pitch) with exposed die pad - requires 0.47–1 µF capacitor between REGC and VSS per datasheet Caution.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104CEANA#20 and R5F104BDANA#20, the R5F104BEANA#20 delivers optimal balance of memory (48 KB flash), ultra-low-power operation (0.60 μA STOP), and peripheral count (16-channel ADC, 3 UART/LIN) for mid-complexity industrial control - avoiding overdesign while ensuring headroom for feature upgrades.

Availability

R5F104BEANA#20 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, home appliance control, and automotive body electronics requiring stable component supply across extended production lifecycles.

Supply support for R5F104BEANA#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 industrial, automotive, and IoT markets.

The RL78/G14 product line delivers true low-power performance (66 μA/MHz, 0.60 μA STOP) with rich analog and communication peripherals - designed specifically for cost-sensitive, battery-operated, and energy-efficient embedded control applications.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104BEANA#20?

The R5F104BEANA#20 operates at up to 32 MHz using its high-speed on-chip oscillator, achieving 44 DMIPS performance. This metric is measured under standard conditions (VDD = 1.8–5.5 V, TA = -40 to +85°C) and reflects the RL78 CPU core's 3-stage pipeline efficiency. The R5F104BEANA#20 supports lower frequencies down to 32.768 kHz for ultra-low-power RTC operation.

Does the R5F104BEANA#20 support LIN bus communication, and which UART channels implement it?

Yes, the R5F104BEANA#20 supports LIN 2.2A protocol through its UART channels - specifically UART0 (P50/P51), UART1 (P00/P01), and UART2 (P13/P14). Each includes hardware support for LIN break detection, sync field generation, and checksum calculation. The R5F104BEANA#20 requires no external transceiver for basic LIN slave functionality.

What are the flash memory configuration details - size, block structure, and security features - for the R5F104BEANA#20?

The R5F104BEANA#20 contains 48 KB of code flash memory organized in 1 KB blocks, with 4 KB of data flash supporting background rewriting (1 million cycles, VDD = 1.8–5.5 V). Security features include programmable block erase/write prohibition and flash shield window protection - preventing unauthorized access to firmware during debugging or field operation.

How does the R5F104BEANA#20 achieve its 0.60 μA STOP mode current, and what peripherals remain active?

The R5F104BEANA#20 achieves 0.60 μA in STOP mode by halting the CPU and most peripherals while retaining power to the real-time clock (RTC) and low-voltage detector (LVD). The RTC maintains calendar time and alarm functions; the LVD monitors VDD at one of 14 selectable thresholds. All other clocks, RAM, and I/O are disabled unless explicitly configured for wake-up events.

Is the R5F104BEANA#20 pin-compatible with other RL78/G14 variants in the same 32-pin HWQFN package?

Yes, the R5F104BEANA#20 shares identical pinout, electrical characteristics, and package dimensions (PWQN0032KB-A / PWQN0032KE-A) with all other 32-pin RL78/G14 devices including R5F104BAANA#20 through R5F104BGANA#20. Pin compatibility enables direct substitution within the same memory grade - verified across Renesas' official ordering tables and package drawings.