Renesas R5F12047GNA#20

Overview

R5F12047GNA#20 from Renesas Electronics is a 16-pin HWQFN-packaged RL78/G15 16-bit microcontroller with 4 KB code flash, 1 KB RAM, and 1 KB data flash, operating at 2.4–5.5 V. It integrates an 8-channel 16-bit timer array, 7-channel 8/10-bit ADC, dual comparators, UART, two simplified SPI (CSI) channels, two simplified I²C channels, and supports industrial temperature range −40°C to +105°C for motor control and sensor interface applications.

For engineers reviewing the R5F12047GNA#20 datasheet, R5F12047GNA#20 pinout, R5F12047GNA#20 application, or R5F12047GNA#20 equivalent, key selection criteria include its 16-pin HWQFN (3 × 3 mm, 0.5-mm pitch) package, 4 KB flash / 1 KB RAM memory configuration, dual comparator support, 7-channel analog input capability, and industrial-grade thermal rating up to +105°C.

Technical Context

The R5F12047GNA#20 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, enabling minimum instruction execution time of 0.0625 μs at 16 MHz using the high-speed on-chip oscillator. Its clock system includes selectable 1–16 MHz high-speed on-chip oscillator (±1.0% accuracy at −20°C to +85°C), 15 kHz low-speed on-chip oscillator, and external crystal support (X1/X2, 1–12 MHz).

Peripheral integration centers on the TAU0 timer array (8 channels), SAU0 serial array unit (2 channels supporting CSI/UART/I²C), and dual independent comparators (COMP0/COMP1) with selectable internal/external reference voltage. The device uses peripheral I/O redirection registers (PIOR) to assign multiplexed functions-including PCLBUZ0, VCOUT0/VCOUT1, and multiple interrupt sources-without hardware redesign.

Key Specifications

Pinout & Package

Package: 16-pin HWQFN (3 × 3 mm, 0.5-mm pitch) with exposed die pad requiring PCB thermal pad connection per datasheet Remark 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F12047GNA#20, R5F12048GNA#20 offers double flash capacity without layout change, while R5F12047GSP#20 retains full functionality in a larger, leaded package suitable for hand-assembly - both preserve identical peripheral sets and industrial temperature qualification.

Availability

R5F12047GNA#20 is available at Aetrix Electronics and suitable for motor control, sensor interface, smart power outlet, and industrial PLC I/O module applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for R5F12047GNA#20 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/G15 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive industrial and consumer applications requiring integrated analog peripherals, robust timing, and extended temperature operation - with R5F12047GNA#20 targeting compact, thermally demanding embedded nodes.

FAQ

What is the maximum operating frequency and clock source flexibility of the R5F12047GNA#20?

The R5F12047GNA#20 supports a maximum operating frequency of 16 MHz using its high-speed on-chip oscillator, which is selectable in steps of 1, 2, 4, 8, or 16 MHz. It also accepts external crystal (X1/X2, 1–12 MHz) or external clock input (EXCLK, 1–16 MHz). The ±1.0% oscillator accuracy at −20°C to +85°C ensures reliable UART and PWM timing without external crystals in many applications. R5F12047GNA#20 maintains full functionality across all clock sources.

Does the R5F12047GNA#20 support in-system programming and data retention during power loss?

Yes, the R5F12047GNA#20 supports self-programming of both code and data flash memory without requiring a boot swap mechanism. Data flash endurance is rated at 1,000,000 write/erase cycles (TYP.), with rewrite voltage matching the operating supply (VDD = 2.4–5.5 V). While background operation (BGO) is not supported - meaning code execution halts during data flash writes - the device includes a selectable power-on-reset (SPOR) circuit with four voltage thresholds to ensure safe initialization after brown-out events. R5F12047GNA#20 guarantees data integrity across its full industrial temperature range.

How many analog input channels and comparators does the R5F12047GNA#20 provide, and what reference options are available?

The R5F12047GNA#20 provides 7 analog input channels (ANI0–ANI6) and two independent comparators (COMP0 and COMP1). Each comparator supports selection between internal reference voltage (0.815 V TYP.) and external reference applied to IVREF0/IVREF1 pins. This dual-comparator architecture enables simultaneous high- and low-threshold detection - for example, overvoltage and undervoltage monitoring on the same analog rail - without additional external components. R5F12047GNA#20's analog subsystem operates across the full −40°C to +105°C range with specified accuracy.

What communication interfaces are integrated into the R5F12047GNA#20, and how are they mapped to pins?

The R5F12047GNA#20 integrates one UART channel, two simplified SPI (CSI) channels, two simplified I²C channels, and one standard I²C channel. These are mapped across pins P00–P07, P40–P41, and P121–P122 using peripheral I/O redirection (PIOR) registers - for example, UART uses P00 (TxD0) and P01 (RxD0), while CSI00 uses P02 (SCK00), P03 (SO00), and P04 (SI00). All interfaces operate at full speed with the 16 MHz system clock. R5F12047GNA#20 supports concurrent use of multiple interfaces via software-configurable pin assignment.

What is the package type and thermal specification of the R5F12047GNA#20, and how does it impact PCB design?

The R5F12047GNA#20 uses a 16-pin HWQFN package (3 × 3 mm, 0.5-mm pitch) with an exposed die pad that must be soldered to a non-electrical thermal pad on the PCB per datasheet Remark 3. Its industrial-grade temperature rating is −40°C to +105°C, qualified for continuous operation at full speed across this range. PCB layout requires 100 nF ceramic decoupling capacitance near VDD/VSS pins and adherence to QFN thermal pad guidelines to ensure reliability in high-temperature environments. R5F12047GNA#20's compact footprint supports high-density industrial control modules.