Renesas R5F12008MNS#50

Overview

R5F12008MNS#50 from Renesas Electronics is an 8-pin industrial-grade RL78/G15 microcontroller with 8 KB code flash, 1 KB RAM, and 1 KB data flash, operating from 2.4 V to 5.5 V across −40°C to +125°C. It integrates an 8/10-bit ADC (3 channels), 8-channel 16-bit timer array, UART, simplified I²C, and simplified SPI - deployed in motor control feedback loops, sensor interface modules, and low-power industrial HMI nodes.

For engineers reviewing the R5F12008MNS#50 datasheet, R5F12008MNS#50 pinout, R5F12008MNS#50 application, or R5F12008MNS#50 equivalent, key selection criteria include its M-grade temperature rating (+125°C), 8-pin LSSOP/SOP/WDFN package compatibility, on-chip debug support, and verified 1 MB address space with RL78 CPU core instruction timing down to 0.0625 μs.

Technical Context

The R5F12008MNS#50 implements the RL78-S2 CPU core - a CISC architecture with 3-stage pipeline and 1 MB address space - executing instructions at minimum 0.0625 μs (16 MHz high-speed on-chip oscillator) or up to 1.0 μs (1 MHz). Its clock system supports selectable high-speed on-chip oscillator (1–16 MHz, ±1.0% accuracy at −20°C to +85°C), low-speed on-chip oscillator (15 kHz), and external crystal input (X1/X2, 1–12 MHz).

Power management includes HALT and STOP modes, selectable power-on-reset (SPOR) with four voltage thresholds (2.25–4.45 V), and true low-power operation down to 54 µA/MHz at 125°C. Peripheral integration centers on TAU0 timer array (8 channels), SAU0 serial array (2 channels), and dedicated comparator (1 channel) with internal/external reference selection.

Key Specifications

Pinout & Package

Package: 8-pin plastic SOP (SOIC, 3.9 × 4.9 mm, 1.27-mm pitch) or 8-pin WDFN (3 × 3 mm, 0.65-mm pitch), both compatible with #50 embossed tape packaging specification.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F12007MNS#50, the R5F12008MNS#50 provides double code flash capacity for robust bootloader+application partitioning; versus R5F12018MSP#50, it trades one analog input and one interrupt for smaller 8-pin footprint and lower assembly cost in space-constrained modules.

Availability

R5F12008MNS#50 is available at Aetrix Electronics and suitable for industrial motor control, sensor interface, HMI keypad, smart actuator, and embedded telemetry applications requiring stable component supply across extended temperature ranges.

Supply support for R5F12008MNS#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 Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G15 product line delivers ultra-low-power, cost-optimized MCUs targeting industrial sensors, motor control, and appliance HMI - designed for seamless migration from legacy 8-bit platforms while supporting modern toolchains and security features.

FAQ

What is the maximum operating frequency and instruction timing of the R5F12008MNS#50?

The R5F12008MNS#50 supports a maximum high-speed on-chip oscillator frequency of 16 MHz, enabling minimum instruction execution time of 0.0625 μs. This timing is achievable with the high-speed on-chip oscillator enabled and no wait states - confirmed in the RL78/G15 datasheet Rev.1.40 Section 1.1. The actual sustained frequency depends on VDD (2.4–5.5 V) and ambient temperature (−40°C to +125°C).

Does the R5F12008MNS#50 support in-system programming of its flash memory?

Yes, the R5F12008MNS#50 supports self-programming of both code flash and data flash memory without requiring external programming hardware. The datasheet confirms "Self-programming (with no boot swap function/flash shield window function)" and specifies 1,000,000 rewrite cycles for data flash. Firmware updates can be performed via UART using the on-chip debug interface - no external programmer needed for field deployment.

What package options are available for the R5F12008MNS#50, and what does the #50 suffix indicate?

The R5F12008MNS#50 is offered in 8-pin plastic SOP (SOIC) and 8-pin WDFN packages, both conforming to the #50 packaging specification - meaning embossed tape packaging for automated SMT placement. The "NS" in the part number denotes 8-pin WDFN or SOP variants, while "M" indicates the industrial +125°C temperature grade. Pin compatibility is maintained across both packages per Table 1-2 in the datasheet.

How many analog input channels does the R5F12008MNS#50 support, and what ADC resolution is available?

The R5F12008MNS#50 supports three analog input channels (ANI0, ANI2, ANI3) with an 8/10-bit successive approximation ADC. Resolution is selectable per conversion, and the internal reference voltage is 0.815 V (typical). All three channels are accessible on the 8-pin package - confirmed in Figure 1-1 and Table 1-2 of the R01DS0420EJ0140 datasheet - enabling compact analog front-end designs without external muxing.

What communication interfaces are integrated into the R5F12008MNS#50, and how are they mapped to pins?

The R5F12008MNS#50 integrates one UART channel (RxD0/TxD0), one simplified I²C channel (SCLA0/SDAA0), and one simplified SPI (CSI) channel (SCK00/SI00/SO00). These are multiplexed onto P01 (RxD0/SDA00/SDAA0), P03 (TxD0/SCLA0), and P04 (SCK00/SCL00) - as detailed in Table 1-2. No dedicated I²C or SPI pins exist; all serial functions share the same physical pins and require software configuration of the serial array unit (SAU0).