Renesas R5F12047ASP#70

Overview

R5F12047ASP#70 from Renesas Electronics is a 16-pin, 4 KB code flash, 1 KB RAM RL78/G15 8-bit microcontroller with RL78 CPU core, operating at 2.4–5.5 V and supporting −40°C to +105°C industrial ambient temperature (G-grade). It integrates an 8/10-bit A/D converter (7 channels), 8-channel 16-bit timer array, UART, simplified I²C (2 channels), simplified SPI (2 channels), and on-chip debug. It targets compact industrial control modules requiring low-power operation and integrated analog peripherals.

For engineers reviewing the R5F12047ASP#70 datasheet, R5F12047ASP#70 pinout, R5F12047ASP#70 application, or R5F12047ASP#70 equivalent, this page delivers verified technical context, package-validated pin functions, real-world use scenarios, and two confirmed alternative parts for design flexibility in cost-sensitive, space-constrained embedded systems.

Technical Context

The R5F12047ASP#70 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 memory subsystem includes 4 KB code flash (1 KB block size), 1 KB data flash (512 B block, 1M rewrite cycles), and 1 KB on-chip RAM - all accessible within a 1 MB address space.

Peripherals are tightly coupled to the TAU0 timer array (8 channels), SAU0 serial array unit (2 channels), and dedicated hardware blocks for 8/10-bit A/D conversion (7 inputs), comparator (1 channel), and programmable clock/buzzer output (PCLBUZ0). Clock generation supports X1/X2 crystal (1–12 MHz), EXCLK input (1–16 MHz), and selectable high-speed on-chip oscillator (1–16 MHz, ±1.0% accuracy at −20°C to +85°C).

Key Specifications

Pinout & Package

Package: 16-pin plastic SSOP (4.4 × 5.0 mm, 0.65-mm pitch), RoHS-compliant, G-grade (−40°C to +105°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F12047ASP#70, R5F12048ASP#70 offers double code flash capacity for larger firmware while maintaining identical timing, I/O, and power characteristics; R5F12047GSP#70 is a packaging variant with no functional deviation, simplifying procurement logistics without design impact.

Availability

R5F12047ASP#70 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat controllers, motor control modules, and PLC I/O expansion units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F12047ASP#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 Corporation is a global semiconductor leader headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G15 product line delivers ultra-low-power 8-bit MCUs optimized for cost-sensitive, space-constrained industrial control applications - emphasizing integrated analog peripherals, robust flash reliability, and simplified development.

FAQ

What is the maximum operating temperature range supported by the R5F12047ASP#70?

The R5F12047ASP#70 is rated for industrial operation from −40°C to +105°C (G-grade). This is confirmed in the datasheet's "Operating ambient temperature" section and applies to all specified electrical characteristics under TA = −40°C to +105°C conditions. The device maintains full functionality-including A/D accuracy, oscillator stability, and flash write endurance-within this range.

Does the R5F12047ASP#70 support in-system programming via its UART interface?

Yes, the R5F12047ASP#70 supports self-programming of its 4 KB code flash and 1 KB data flash using the on-chip debug interface or user firmware routines. While UART (RxD0/TxD0 on P01/P00) is commonly used for host communication, actual flash programming requires the dedicated TOOLRxD/TOOLTxD pins or the on-chip debug ROM bootloader - not raw UART commands alone.

How many analog input channels does the R5F12047ASP#70 provide, and what is their resolution?

The R5F12047ASP#70 provides 7 analog input channels (ANI0–ANI6) with selectable 8-bit or 10-bit resolution. This is explicitly stated in Table 1-4 (Multiplexed Functions of 16-pin Products) and Section 1.6 (Outline of Functions). The A/D converter operates across the full 2.4–5.5 V supply range and includes an internal 0.815 V reference voltage.

Is the R5F12047ASP#70 pin-compatible with other RL78/G15 variants in the 16-pin SSOP package?

Yes, the R5F12047ASP#70 shares identical pin configuration and function mapping with all 16-pin RL78/G15 devices in SSOP (e.g., R5F12048ASP#70, R5F12047GSP#70), as defined in Figure 1-1 and Table 1-4 of the datasheet. All share the same 16-pin SSOP mechanical outline and multiplexed I/O assignments, enabling drop-in replacement where flash size or grade permits.

What oscillator options are available for the R5F12047ASP#70, and which is recommended for lowest BOM cost?

The R5F12047ASP#70 supports three oscillator sources: external crystal (X1/X2, 1–12 MHz), external clock input (EXCLK, 1–16 MHz), and high-speed on-chip oscillator (1–16 MHz). For lowest BOM cost, the high-speed on-chip oscillator is recommended - it requires no external components and delivers ±1.0% accuracy over −20°C to +85°C, sufficient for most non-precision timing applications.