Renesas R5F10366DSP#V0

Overview

R5F10366DSP#V0 from Renesas Electronics is a 20-pin LSSOP ultra-low-power 16-bit RL78/G12 microcontroller designed for cost-sensitive consumer and industrial embedded control. It features 2 KB code flash, 256 B RAM, 10-bit A/D converter (8 channels), single UART, and operates from 1.8 V to 5.5 V at –40°C to +85°C - ideal for battery-powered sensor nodes and appliance sub-systems.

For engineers reviewing the R5F10366DSP#V0 datasheet, R5F10366DSP#V0 pinout, R5F10366DSP#V0 application, or R5F10366DSP#V0 equivalent, key selection considerations include its lack of data flash memory, absence of DMA and safety functions (CRC/SFR guard), reduced serial interface count (1 UART, 1 CSI, no I²C), and ±5.0% high-speed on-chip oscillator accuracy over temperature - all confirmed for this exact variant.

Technical Context

The R5F10366DSP#V0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting minimum instruction execution time of 0.04167 µs at 24 MHz (high-speed on-chip oscillator). Its clock system integrates selectable high-speed on-chip oscillator (1–24 MHz) and low-speed 15 kHz on-chip oscillator, with power management modes including HALT, STOP, and SNOOZE.

Peripheral integration includes one 16-bit timer array (TAU0) with 4 channels, one 12-bit interval timer, one window watchdog timer, and programmable clock/buzzer output (PCLBUZ0). The device lacks DMA, data flash, CRC engine, and RAM/SFR guard - distinguishing it from R5F102x counterparts per Renesas' documented R5F103 product differentiation.

Key Specifications

Pinout & Package

Package: 20-pin plastic LSSOP (4.4 × 6.5 mm, 0.65-mm pitch), RoHS-compliant, tray packaging (#V0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10266DSP#V0, R5F10366DSP#V0 trades data flash, DMA, and tighter oscillator tolerance for lower cost and simpler qualification; versus R5F10368DSP#V0, it offers identical functionality at reduced memory capacity - enabling cost-optimized designs where firmware footprint is tightly constrained.

Availability

R5F10366DSP#V0 is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial panel controllers, and appliance sub-systems requiring stable component supply across multi-year production cycles.

Supply support for R5F10366DSP#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 Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for automotive, industrial, and IoT markets.

The RL78/G12 product line delivers ultra-low-power 16-bit MCUs targeting cost-sensitive embedded control applications - emphasizing energy efficiency, integrated peripherals, and simplified development for consumer and industrial equipment.

FAQ

What is the maximum operating frequency of the R5F10366DSP#V0?

The R5F10366DSP#V0 supports a maximum high-speed on-chip oscillator frequency of 24 MHz, delivering 31 DMIPS performance. External crystal operation is limited to 20 MHz in HS mode (VDD ≥ 2.7 V) or 16 MHz (VDD ≥ 2.4 V), and 8 MHz in LS mode (VDD ≥ 1.8 V). The actual achievable frequency depends on supply voltage and oscillator configuration.

Does the R5F10366DSP#V0 include data flash memory?

No, the R5F10366DSP#V0 does not include data flash memory. This is a defining characteristic of the R5F103 product family per Renesas documentation. The device contains only 2 KB of code flash memory and 256 B of RAM. Applications requiring nonvolatile parameter storage must use external EEPROM or utilize code flash sectors with self-programming - though self-programming is explicitly disabled for R5F10366.

What are the key differences between R5F10366DSP#V0 and R5F10266DSP#V0?

The R5F10366DSP#V0 omits data flash memory, DMA controller, CRC engine, and RAM/SFR guard features present in R5F10266DSP#V0. Its high-speed on-chip oscillator accuracy is ±5.0% (vs. ±1.0% for R5F10266), and it lacks simplified I²C and second CSI channel. Both share identical 20-pin LSSOP package, pinout, and core architecture.

Can the R5F10366DSP#V0 operate from a 1.8 V supply?

Yes, the R5F10366DSP#V0 is fully specified to operate from 1.8 V to 5.5 V. At 1.8 V, the high-speed on-chip oscillator supports frequencies up to 8 MHz, and the low-speed on-chip oscillator runs at 15 kHz. All I/O pins tolerate 1.8 V logic levels, and the 10-bit A/D converter remains functional with internal 1.45 V reference - enabling true single-supply operation in ultra-low-voltage systems.

Which development tools support the R5F10366DSP#V0?

The R5F10366DSP#V0 is supported by Renesas' CS+ IDE, e² studio (with GCC-RL78 toolchain), and the Renesas Flash Programmer. Hardware debug interfaces include the E2 emulator Lite and E2 emulator standard. The on-chip debug function enables full flash programming, breakpoint setting, and real-time variable monitoring without external debug probes - verified for R5F10366DSP#V0 in the RL78/G12 User's Manual.