Renesas R5F12008GNS#70

Overview

R5F12008GNS#70 from Renesas Electronics is an 8-pin, industrial-grade RL78/G15 16-bit microcontroller with 8 KB code flash, 1 KB RAM, and 1 KB data flash. It operates from 2.4 V to 5.5 V, supports HALT/STOP low-power modes, and integrates an 8/10-bit A/D converter (3 channels), 8-channel 16-bit timer array, UART, simplified I²C, and simplified SPI - deployed in smart sensors and industrial control nodes requiring extended temperature operation.

For engineers reviewing the R5F12008GNS#70 datasheet, R5F12008GNS#70 pinout, R5F12008GNS#70 application, or R5F12008GNS#70 equivalent, key selection criteria include its −40°C to +105°C industrial temperature rating, 8-pin WDFN package (3 × 3 mm, 0.65-mm pitch), high-speed on-chip oscillator accuracy (±1.0% at TA = −20 to +85°C), and integrated comparator with internal reference voltage.

Technical Context

The R5F12008GNS#70 implements the RL78 CPU core with a 3-stage pipeline CISC architecture, 1 MB address space, and selectable minimum instruction execution time (0.0625 μs @ 16 MHz or 1.0 μs @ 1 MHz). Its clock system combines a high-speed on-chip oscillator (1–16 MHz, ±1.0% accuracy over −20 to +85°C) and a dedicated 15 kHz low-speed on-chip oscillator for watchdog timing.

Peripheral integration includes a single-channel 8/10-bit A/D converter with 3 analog inputs (ANI0, ANI2, ANI3), one comparator (IVCMP0/IVREF0), programmable clock/buzzer output (PCLBUZ0), and serial interfaces: UART0 (1 channel), simplified I²C (1 channel), and simplified SPI (CSI00, 1 channel) - all mapped to its 6 usable I/O pins in the 8-pin WDFN configuration.

Key Specifications

Pinout & Package

Package: 8-pin WDFN (3 × 3 mm, 0.65-mm pitch), exposed pad for thermal dissipation (no electrical connection required).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F12007GNS#70, the R5F12008GNS#70 offers double code flash for complex algorithms; compared with R5F12018GSP#70, it trades one analog input and dedicated TxD for smaller footprint and lower component count in space-constrained nodes.

Availability

R5F12008GNS#70 is available at Aetrix Electronics and suitable for industrial motor controllers, smart sensor nodes, programmable logic relays, and power monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F12008GNS#70 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/G15 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive industrial control, sensor interfacing, and appliance applications - emphasizing minimal footprint, integrated analog, and robust operation from −40°C to +125°C.

FAQ

What is the maximum operating frequency and instruction execution time of the R5F12008GNS#70?

The R5F12008GNS#70 supports a maximum high-speed on-chip oscillator frequency of 16 MHz, yielding a minimum instruction execution time of 0.0625 μs. This timing is achievable under VDD = 2.4–5.5 V and TA = −20 to +85°C, with oscillator accuracy maintained at ±1.0%. The device also supports lower frequencies (1–8 MHz) for reduced power consumption.

Does the R5F12008GNS#70 support crystal oscillator input, and what are the requirements?

The R5F12008GNS#70 does not support external crystal oscillator input. Its 8-pin WDFN variant lacks X1/X2 pins - only the 16-pin and 20-pin RL78/G15 packages include crystal oscillator connections. This part relies exclusively on its high-speed on-chip oscillator (1–16 MHz) and low-speed on-chip oscillator (15 kHz), eliminating need for external crystals or load capacitors.

How many analog input channels are available on the R5F12008GNS#70, and what reference voltage options does it support?

The R5F12008GNS#70 provides three analog input channels: ANI0, ANI2, and ANI3. It supports both internal and external reference voltages - the internal reference is fixed at 0.815 V (typical), while external references can be applied via the IVREF0 pin. No separate VREF pin is present; IVREF0 serves as the analog reference input for the A/D converter.

Can the R5F12008GNS#70 perform background data flash writes while executing code from main flash?

No, the R5F12008GNS#70 does not support background operation (BGO) for data flash writes. During data flash rewriting, code execution from the main flash memory is halted. The device requires explicit firmware coordination to enter a safe state before initiating flash write operations, and no instructions may be fetched from code flash during the rewrite cycle.

What debug interface is supported by the R5F12008GNS#70, and how is it physically implemented?

The R5F12008GNS#70 supports on-chip debug via the TOOL0 pin (P40), which serves as the bidirectional debug data line. Debug clock is derived internally; no dedicated debug clock pin is required. This single-wire interface enables full program download, breakpoint setting, and real-time variable inspection using Renesas E2 studio and compatible debug probes - all within the constraints of its 8-pin WDFN package.