Renesas R5F104ACASP#V0

Overview

R5F104ACASP#V0 from Renesas is a 30-pin LSSOP-packaged RL78/G14 16-bit microcontroller with 16 KB flash, 2.5 KB RAM, and 4 KB data flash, operating from 1.6–5.5 V at -40 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 10-bit ADC (16 channels), UART/SPI/I²C interfaces, RTC, and on-chip debug.

For engineers reviewing the R5F104ACASP#V0 datasheet, R5F104ACASP#V0 pinout, R5F104ACASP#V0 application, or R5F104ACASP#V0 equivalent, key selection criteria include its 30-pin LSSOP footprint, 16 KB code flash capacity, A-grade industrial temperature rating, and support for low-power sensor node and battery-powered control designs requiring integrated analog peripherals and real-time clock functionality.

Technical Context

The R5F104ACASP#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 dedicated hardware blocks for Data Transfer Controller (DTC), Event Link Controller (ELC), and background operation of data flash rewriting (BGO).

Its peripheral set is optimized for mixed-signal embedded control: 10-bit ADC with internal reference (1.45 V) and temperature sensor, dual UART channels (one supporting LIN-bus), up to 8 CSI/SPI channels, and programmable low-voltage detection (LVD) with 14 selectable thresholds for system-level power monitoring and safe shutdown.

Key Specifications

Pinout & Package

Package: 30-pin plastic LSSOP (7.62 mm, 0.65 mm pitch), compliant with JEDEC MS-012, suitable for automated assembly and space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104BCASP#V0 and R5F104ADASP#V0, the R5F104ACASP#V0 offers optimal cost/performance balance for resource-constrained sensor nodes where 16 KB flash and 2.5 KB RAM suffice, avoiding over-provisioning while maintaining full peripheral compatibility and identical PCB layout.

Availability

R5F104ACASP#V0 is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial temperature controllers, and medical wearable monitors requiring stable component supply across production lifecycles.

Supply support for R5F104ACASP#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 general-purpose embedded control applications demanding ultra-low power, integrated analog peripherals, and robust real-time performance in cost-sensitive designs.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104ACASP#V0?

The R5F104ACASP#V0 operates at up to 32 MHz and delivers 44 DMIPS (Dhrystone MIPS) under standard conditions. This performance level is achieved using the RL78 CPU core's 3-stage pipeline and optimized instruction set, enabling deterministic execution of real-time control algorithms. The R5F104ACASP#V0 maintains this rating across its full 1.6–5.5 V supply range and -40 to +85°C temperature span, making it suitable for time-critical embedded applications.

Does the R5F104ACASP#V0 support LIN-bus communication, and which peripheral implements it?

Yes, the R5F104ACASP#V0 supports LIN-bus communication through its UART peripheral. Specifically, one of its UART channels (e.g., UART0 or UART2, configurable via register settings) meets LIN 2.2 physical layer requirements, including slew-rate control and dominant timeout detection. This capability is documented in the RL78/G14 hardware manual and enables direct integration into automotive body electronics and industrial sub-networks without external transceivers.

What are the memory resources allocated to the R5F104ACASP#V0, and how is data flash utilized?

The R5F104ACASP#V0 includes 16 KB of code flash memory, 2.5 KB of on-chip RAM, and 4 KB of dedicated data flash memory. The data flash supports background operation (BGO), allowing program execution from main flash while simultaneously rewriting non-volatile parameters. It guarantees 1,000,000 write cycles at 1.8–5.5 V, enabling reliable storage of calibration data, device configuration, or usage logs without requiring external EEPROM.

Which analog peripherals are integrated into the R5F104ACASP#V0, and what reference options does the ADC support?

The R5F104ACASP#V0 integrates a 10-bit successive approximation register (SAR) ADC with up to 16 input channels, an 8-bit D/A converter (2-channel output), and two analog comparators. Its ADC supports both external reference voltages and an internal 1.45 V reference, eliminating the need for external precision references in many sensor applications. Additionally, an on-chip temperature sensor is connected to the ADC, enabling system-level thermal monitoring without external components.

What low-power modes are available on the R5F104ACASP#V0, and what is the lowest current draw achievable?

The R5F104ACASP#V0 supports HALT, STOP, and SNOOZE low-power modes. In STOP mode with only the real-time clock (RTC) and low-voltage detector (LVD) active, it achieves 0.60 μA typical current consumption at VDD = 3.0 V and TA = 25°C. This ultra-low quiescent current enables multi-year battery operation in always-on sensing applications, and the RTC retains calendar functionality with alarm and clock correction features fully operational during STOP mode.