Renesas R5F104AEASP#V0

Overview

R5F104AEASP#V0 from Renesas is a 40-pin LSSOP-packaged RL78/G14 16-bit microcontroller with 48 KB flash, 5.5 KB RAM, and 4 KB data flash, operating from 1.6–5.5 V at -40°C to +85°C (A-grade). 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, 10-bit ADC (16 channels), RTC, and on-chip debug.

For engineers reviewing the R5F104AEASP#V0 datasheet, R5F104AEASP#V0 pinout, R5F104AEASP#V0 application, or R5F104AEASP#V0 equivalent, this MCU is selected for battery-powered sensor nodes, industrial control panels, and low-power HMI systems where code density, peripheral flexibility, and sub-1μA standby current are critical design requirements.

Technical Context

The R5F104AEASP#V0 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 includes a Data Transfer Controller (DTC) for autonomous memory transfers triggered by interrupts and an Event Link Controller (ELC) enabling hardware-triggered peripheral chaining without CPU intervention.

Its mixed-signal subsystem comprises a 10-bit SAR ADC with internal 1.45 V reference and temperature sensor, dual 8-bit DAC outputs (0–VDD range), two comparators with window/low-speed modes, and a real-time clock with calendar, alarm, and auto-correction functions - all operable in ultra-low-power STOP and SNOOZE modes.

Key Specifications

Pinout & Package

Package: 30-pin LSSOP (7.62 mm × 4.4 mm, 0.65 mm pitch), surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104BEASP#V0 and R5F104CEASP#V0, the R5F104AEASP#V0 provides optimal cost/performance balance for resource-constrained, battery-operated systems where 48 KB flash suffices and ultra-low standby current is prioritized over peripheral expansion.

Availability

R5F104AEASP#V0 is available at Aetrix Electronics and suitable for smart home sensor hubs, portable medical monitors, and energy harvesting nodes requiring stable component supply, long-term lifecycle assurance, and full traceability.

Supply support for R5F104AEASP#V0 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, and power solutions for automotive, industrial, and IoT markets.

The RL78/G14 product line targets cost-sensitive, ultra-low-power embedded applications - delivering high integration, robust toolchain support, and certified functional safety (IEC 61508 SIL2) for industrial control and sensing.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F104AEASP#V0?

The R5F104AEASP#V0 operates up to 32 MHz with a peak performance of 44 DMIPS. This is achieved using the RL78 CPU core's 3-stage pipeline and high-speed on-chip oscillator. At 32 MHz, the minimum instruction execution time is 0.03125 μs, enabling deterministic real-time response for motor control and communication protocols. The R5F104AEASP#V0 maintains this performance across its full 1.6–5.5 V supply range and -40°C to +85°C temperature grade.

Does the R5F104AEASP#V0 support in-system programming and secure firmware updates?

Yes, the R5F104AEASP#V0 supports full in-system programming via on-chip debug interface and includes flash shield window and boot swap functionality. These features enable secure over-the-air (OTA) updates with rollback capability and protection against unauthorized reprogramming. The R5F104AEASP#V0 also supports self-programming of both code and data flash memory while operating from VDD = 1.8–5.5 V, ensuring reliability during brown-out conditions.

How many analog-to-digital converter (ADC) channels does the R5F104AEASP#V0 provide, and what is its resolution?

The R5F104AEASP#V0 integrates a 10-bit successive approximation register (SAR) ADC with up to 16 analog input channels (ANI0–ANI18, excluding reserved pins). It includes an internal 1.45 V reference voltage and a built-in temperature sensor, allowing accurate ratiometric measurements without external components. The ADC operates across the full 1.6–5.5 V supply range and supports programmable sample-and-hold timing for noise immunity in noisy industrial environments.

What low-power modes are available on the R5F104AEASP#V0, and what is the lowest achievable current draw?

The R5F104AEASP#V0 offers HALT, STOP, and SNOOZE low-power modes. In STOP mode with only the real-time clock (RTC) and low-voltage detector (LVD) active, it draws just 0.60 μA (typical) at VDD = 3.0 V and TA = 25°C. This ultra-low standby current enables multi-year battery life in wireless sensor nodes. Wake-up from STOP mode occurs in under 4 μs via external interrupt or RTC alarm, preserving real-time responsiveness.

Is the R5F104AEASP#V0 pin-compatible with other RL78/G14 variants in the same LSSOP-30 package?

Yes, the R5F104AEASP#V0 is fully pin-compatible with all RL78/G14 devices in the 30-pin LSSOP package (e.g., R5F104BEASP#V0, R5F104CEASP#V0), sharing identical pin count, pitch, mechanical footprint, and core peripheral mapping. This allows direct substitution for capacity scaling - for example, upgrading to 64 KB flash without PCB redesign. All share the same REGC decoupling requirement and RESET behavior, ensuring seamless migration.