Renesas R5F104FEAFP#50

Overview

R5F104FEAFP#50 from Renesas is a 44-pin LQFP, 48 KB flash, 5.5 KB RAM RL78/G14 16-bit microcontroller with ultra-low-power operation (66 μA/MHz), integrated 10-bit ADC (16 channels), UART/SPI/I²C interfaces, and real-time clock - deployed in battery-powered industrial sensors and smart metering endpoints.

For engineers reviewing the R5F104FEAFP#50 datasheet, R5F104FEAFP#50 pinout, R5F104FEAFP#50 application, or R5F104FEAFP#50 equivalent, key selection criteria include its 44-pin LQFP-0.8 mm pitch package, -40°C to +85°C industrial temperature grade (D suffix), 48 KB code flash with data flash support, and integrated low-voltage detector with 14-level interrupt/reset capability.

Technical Context

The R5F104FEAFP#50 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), and includes multiply/divide/accumulate instructions. Its memory subsystem integrates 48 KB on-chip flash (1 KB block size), 5.5 KB RAM, and 4 KB data flash with background operation (BGO) and 1M-cycle rewrite endurance.

Peripheral integration includes 16-bit Timer Array Unit (TAU) with up to 8 channels, 12-bit interval timer, calendar RTC with alarm/correction, watchdog timer, 10-bit ADC (16 input channels, internal 1.45 V reference), 8-bit DAC (2-channel), two comparators, and serial interfaces: 3–4 UART/LIN channels, 3–8 CSI (SPI-compatible) channels, and 4–10 I²C/simplified I²C channels.

Key Specifications

Pinout & Package

Package: 44-pin LQFP (10 × 10 mm, 0.8 mm pitch), RoHS-compliant, plastic body with exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104GEAFP#50, the R5F104FEAFP#50 trades flash capacity for cost-sensitive deployments where firmware fits within 48 KB; versus R5F104FEAFB#50, it offers immediate drop-in compatibility on existing 44-pin LQFP layouts without footprint or routing changes.

Availability

R5F104FEAFP#50 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart utility meters, and home appliance control systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for R5F104FEAFP#50 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 delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated industrial and consumer applications demanding high integration, robustness, and long-term supply stability.

FAQ

What is the maximum operating frequency and corresponding power consumption of the R5F104FEAFP#50?

The R5F104FEAFP#50 operates up to 32 MHz using the high-speed on-chip oscillator. At this frequency, active current consumption is rated at 66 μA per MHz - resulting in approximately 2.1 mA total at 32 MHz under typical conditions. The device also supports lower-frequency subsystem clocks (e.g., 32.768 kHz RTC) drawing just 0.60 μA in STOP mode.

Does the R5F104FEAFP#50 support in-circuit debugging and programming?

Yes, the R5F104FEAFP#50 includes full on-chip debug functionality via the dedicated TOOLRxD/TOOLTxD pins (P50/P51). It supports Renesas E2 studio and CS+ IDEs using the E2 Lite or E2 emulator, enabling breakpoints, watchpoints, flash programming, and real-time variable monitoring without external JTAG hardware.

How many serial communication interfaces does the R5F104FEAFP#50 integrate, and what protocols do they support?

The R5F104FEAFP#50 integrates three UART/LIN channels, up to eight CSI (SPI-compatible) channels, and up to ten I²C/simplified I²C channels. UART supports LIN 2.2 frame formatting; CSI supports master/slave SPI with configurable polarity/phase; I²C supports standard/fast-mode (100/400 kbps) and slave addressing flexibility.

What is the data flash endurance and voltage range for reprogramming the R5F104FEAFP#50?

The R5F104FEAFP#50 features 4 KB of data flash with guaranteed endurance of 1,000,000 write/erase cycles (typical). Reprogramming is supported across the full VDD range of 1.8 V to 5.5 V, enabling reliable field updates even in brown-out conditions where main supply dips temporarily.

Can the R5F104FEAFP#50 operate from a 1.8 V supply, and what peripherals remain functional at that voltage?

Yes, the R5F104FEAFP#50 supports operation down to 1.6 V, so 1.8 V is fully within specification. At 1.8 V, all core peripherals function including the 10-bit ADC (with internal 1.45 V reference), 16-bit timers, RTC, UART, CSI, I²C, and data flash BGO - making it suitable for single-cell Li-ion or 2×AA battery systems.