Renesas R5F104CGALA#U0

Overview

R5F104CGALA#U0 from Renesas is a 36-pin WFLGA-packaged RL78/G14 16-bit microcontroller with 96 KB flash, 12 KB RAM, and 8 KB data flash, operating from 1.6–5.5 V at -40 to +105°C (industrial G-grade). It delivers 44 DMIPS at 32 MHz, features a 12-bit RTC with calendar/alarm, 10-bit 20-channel ADC, and ultra-low-power HALT/STOP/SNOOZE modes for battery-powered industrial control nodes.

For engineers reviewing the R5F104CGALA#U0 datasheet, R5F104CGALA#U0 pinout, R5F104CGALA#U0 application, or R5F104CGALA#U0 equivalent, key selection criteria include its 36-pin WFLGA (4 × 4 mm) footprint, integrated LVD with 14-level interrupt/reset, dual UART/LIN support, and hardware DTC/ELC for deterministic peripheral event handling in resource-constrained embedded systems.

Technical Context

The R5F104CGALA#U0 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) activated by 19–26 event sources and an Event Link Controller (ELC) for direct peripheral-to-peripheral signal routing without CPU intervention.

Its memory subsystem includes 96 KB code flash (1 KB block size), 8 KB data flash with background operation (BGO) and 1M rewrite cycles, and 12 KB on-chip RAM. Power management includes on-chip POR, 14-level LVD, and multiple low-power modes achieving 66 μA/MHz active current and 0.60 μA RTC+LVD retention.

Key Specifications

Pinout & Package

Package: 36-pin WFLGA (4 × 4 mm, 0.5 mm pitch), lead-free, moisture-sensitive level 3 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104BGALA#U0 and R5F104EGALA#U0, the R5F104CGALA#U0 provides optimal balance of memory (96 KB flash, 12 KB RAM), industrial temperature rating (-40°C to +105°C), and ultra-low-power retention (0.60 μA), making it ideal for mid-complexity industrial edge nodes where cost, size, and longevity are jointly constrained.

Availability

R5F104CGALA#U0 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, automotive body electronics, and home appliance control requiring stable component supply across extended product lifecycles.

Supply support for R5F104CGALA#U0 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 applications - delivering high integration, robust industrial qualification, and toolchain compatibility with e2 studio and CS+ IDEs.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F104CGALA#U0?

The R5F104CGALA#U0 operates up to 32 MHz using its high-speed on-chip oscillator, delivering 44 DMIPS of processing performance. Its minimum instruction execution time is 0.03125 µs at this speed, and it supports dynamic clock scaling down to 32.768 kHz for ultra-low-power RTC operation. This frequency agility allows the R5F104CGALA#U0 to balance real-time responsiveness with energy efficiency across diverse workloads.

Does the R5F104CGALA#U0 support LIN bus communication, and how is it implemented?

Yes, the R5F104CGALA#U0 supports LIN bus communication through its UART peripherals, which include hardware-assisted LIN break detection, sync field generation, and identifier verification per ISO 17987-4. The UART channels (e.g., UART2 on P13/P14) can be configured as LIN master or slave without external transceivers, and the on-chip LVD ensures reliable operation across automotive battery voltage fluctuations - a key requirement for R5F104CGALA#U0 deployments in body electronics.

What are the data flash endurance and rewrite voltage requirements for the R5F104CGALA#U0?

The R5F104CGALA#U0 includes 8 KB of data flash rated for 1,000,000 rewrite cycles (typical) and supports rewriting across the full operating voltage range of 1.8 V to 5.5 V. Background operation (BGO) allows program execution from code flash during data flash writes, enabling seamless firmware updates or parameter storage without halting application logic - a critical capability for R5F104CGALA#U0 in always-on industrial devices.

How does the R5F104CGALA#U0 achieve ultra-low-power operation, and what are the key low-power modes?

The R5F104CGALA#U0 achieves ultra-low-power operation via three primary modes: HALT (66 μA/MHz active current), STOP (0.60 μA with RTC and LVD active), and SNOOZE (low-power peripheral operation with CPU halted). These modes leverage the on-chip low-voltage detector, optimized power gating, and clock domain isolation. For R5F104CGALA#U0 designs targeting >10-year battery life, STOP mode with RTC wake-up is typically used to minimize quiescent current while maintaining timekeeping integrity.

Is the R5F104CGALA#U0 pin-compatible with other RL78/G14 variants in the same package?

Yes, the R5F104CGALA#U0 is pin-compatible with all other RL78/G14 variants offered in the 36-pin WFLGA package (e.g., R5F104BGALA#U0, R5F104EGALA#U0), sharing identical pin count, pitch, mechanical footprint, and I/O assignment. This allows drop-in replacement across memory variants during prototyping or production ramp, provided firmware is recompiled for the target flash/RAM configuration - a key advantage of the R5F104CGALA#U0 within the scalable RL78/G14 family.