Renesas R5F10366ASP#35

Overview

R5F10366ASP#35 from Renesas Electronics is a 20-pin LSSOP ultra-low-power 16-bit RL78/G12 microcontroller for consumer-grade embedded control, featuring 2 KB code flash, 256 B RAM, 1.8–5.5 V operation, 24 MHz max CPU speed (31 DMIPS), and 63 μA/MHz active current. It integrates an 8/10-bit 11-channel ADC, UART, CSI, on-chip debug, and operates across –40°C to +85°C.

For engineers reviewing the R5F10366ASP#35 datasheet, R5F10366ASP#35 pinout, R5F10366ASP#35 application, or R5F10366ASP#35 equivalent, this page delivers verified technical context, package mapping, real-world use cases, and validated alternative options for cost-sensitive, battery-powered general-purpose MCU selection.

Technical Context

The R5F10366ASP#35 implements the RL78 CPU core with 3-stage pipeline CISC architecture, 1 MB address space, and selectable instruction execution time (0.04167 µs at 24 MHz). It supports HALT, STOP, and SNOOZE low-power modes without data flash-distinguishing it from R5F102xx variants.

Its peripheral set includes one UART channel, one simplified SPI (CSI) channel, no simplified I²C, four 16-bit timer channels, one watchdog timer, and 18 I/O pins (including two 6-V-tolerant N-ch open-drain outputs). The high-speed on-chip oscillator offers ±5.0% accuracy over –40°C to +85°C.

Key Specifications

Pinout & Package

Package: 20-pin plastic LSSOP (4.4 × 6.5 mm, 0.65-mm pitch), JEDEC standard PLSP0020JB-A footprint, compatible with automated SMT assembly and reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10266ASP#35, the R5F10366ASP#35 trades data flash and tighter oscillator tolerance for lower cost and simpler qualification; versus R5F10368ASP#35, it offers minimal flash footprint for deeply embedded, fixed-function tasks with strict BOM constraints.

Availability

R5F10366ASP#35 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, smart lighting controllers, and consumer IoT remotes requiring stable component supply and long-term production continuity.

Supply support for R5F10366ASP#35 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 true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and general-purpose embedded control applications with integrated analog and communication peripherals.

FAQ

What is the maximum operating frequency of the R5F10366ASP#35?

The R5F10366ASP#35 supports a maximum CPU clock frequency of 24 MHz using the high-speed on-chip oscillator, delivering 31 DMIPS performance. External crystal operation is limited to 20 MHz (1.8–5.5 V) or 16 MHz (1.8–2.7 V), and the minimum instruction execution time is 0.04167 µs under 24 MHz conditions. This frequency is fully supported across its –40°C to +85°C operating range.

Does the R5F10366ASP#35 include data flash memory?

No, the R5F10366ASP#35 does not include data flash memory. As confirmed in the RL78/G12 datasheet Section 1.3.1, R5F103 products-including R5F10366ASP#35-have no mounted data flash, unlike R5F102 variants which include 2 KB. This simplifies firmware architecture but requires external EEPROM or FRAM if non-volatile parameter storage is needed.

What package type and pin count does the R5F10366ASP#35 use?

The R5F10366ASP#35 uses a 20-pin plastic LSSOP package (4.4 × 6.5 mm, 0.65-mm pitch), identified by the "SP" suffix and JEDEC code PLSP0020JB-A. It is supplied in tray packaging per ordering code #35, and shares footprint compatibility with other 20-pin RL78/G12 variants like R5F10266ASP#35 and R5F10368ASP#35.

Can the R5F10366ASP#35 operate from a 1.8 V supply?

Yes, the R5F10366ASP#35 is fully specified to operate from 1.8 V to 5.5 V, enabling direct interface with 1.8 V logic families and low-voltage sensors. At 1.8 V, the maximum allowed CPU frequency is 8 MHz (LS mode), and the high-speed on-chip oscillator remains functional with ±5.0% accuracy across the full –40°C to +85°C range.

How many analog input channels does the R5F10366ASP#35 support?

The R5F10366ASP#35 supports 11 analog input channels: ANI0 through ANI3 and ANI16 through ANI22. These are accessible via dedicated pins (e.g., P20–P23, P10–P14, P41–P42) and share internal 8/10-bit ADC resources with internal reference (1.45 V) and temperature sensor. Channel selection is software-configurable via the ADCSR register.