Renesas R5F10368ASP#35

Overview

R5F10368ASP#35 from Renesas Electronics is a 20-pin RL78/G12 16-bit microcontroller designed for ultra-low-power embedded control in consumer-grade applications (–40°C to +85°C). It features 8 KB code flash, 512 B RAM, 10-bit 8-channel ADC, 4-channel 16-bit TAU timer, and single UART with 1.8–5.5 V operation - deployed in battery-powered sensor nodes and smart home peripherals.

For engineers reviewing the R5F10368ASP#35 datasheet, R5F10368ASP#35 pinout, R5F10368ASP#35 application, or R5F10368ASP#35 equivalent, key selection criteria include its TSSOP20 package, absence of data flash and DMA, ±5% high-speed on-chip oscillator accuracy over –40°C to +85°C, and support for simplified SPI (1 channel) and I²C (0 channels).

Technical Context

The R5F10368ASP#35 implements the RL78 CPU core with 3-stage pipeline CISC architecture, delivering 31 DMIPS at 24 MHz while consuming only 63 μA/MHz. Its clock system integrates a high-speed on-chip oscillator (selectable 1–24 MHz, ±5% accuracy), low-speed 15 kHz on-chip oscillator, and external crystal input (X1/X2 up to 20 MHz).

Peripheral integration includes UART0 (1 channel), CSI00 (1 simplified SPI channel), 12-bit interval timer, window watchdog timer, on-chip power-on-reset and voltage detector (12-level LVD), and key interrupt support across 6 pins - all configured via dedicated SFRs without DMA or CRC acceleration.

Key Specifications

Pinout & Package

Package: 20-pin plastic TSSOP (4.4 × 6.5 mm, 0.65-mm pitch), RoHS-compliant, surface-mountable with standard reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10268ASP#35, the R5F10368ASP#35 trades data flash and DMA for lower BOM cost and reduced layout complexity; versus R5F103AAASP#30, it offers identical core functionality in a smaller footprint and lower price point for space-constrained designs.

Availability

R5F10368ASP#35 is available at Aetrix Electronics and suitable for smart home sensors, industrial panel meters, and USB-C power monitors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R5F10368ASP#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 global semiconductor leader headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions 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 - balancing performance, energy efficiency, and peripheral integration.

FAQ

What is the maximum operating frequency and instruction throughput of the R5F10368ASP#35?

The R5F10368ASP#35 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS of processing performance. Its minimum instruction execution time is 0.04167 µs at 24 MHz, enabled by the RL78 CPU's 3-stage pipeline architecture. This throughput supports real-time control loops in motor drives and sensor fusion applications without external acceleration.

Does the R5F10368ASP#35 include data flash memory or DMA capability?

No, the R5F10368ASP#35 does not include data flash memory or DMA controller functionality. These features are present in the R5F102xx series but omitted in the R5F103xx family to reduce cost and silicon area. Firmware must manage non-volatile storage externally or use code flash with self-programming libraries, and data transfers rely on CPU polling or interrupt-driven methods.

What are the supported serial communication interfaces on the R5F10368ASP#35?

The R5F10368ASP#35 supports one UART channel (UART0), one simplified SPI channel (CSI00), and zero I²C channels in its base configuration. While P60/P61 can be configured as I²C clock/data pins, the R5F103xx series lacks the IICA peripheral hardware required for full I²C operation - making UART or SPI the only viable serial protocols for this device.

What is the oscillator accuracy specification for the R5F10368ASP#35 over temperature?

The high-speed on-chip oscillator of the R5F10368ASP#35 has a frequency accuracy of ±5.0% over the full operating ambient temperature range of –40°C to +85°C. This specification applies to all R5F103xx devices and is less stringent than the ±1.0% accuracy offered by the R5F102xx series, reflecting its target use in cost-optimized consumer applications where tight timing tolerances are not required.

How many analog input channels and what ADC resolution does the R5F10368ASP#35 provide?

The R5F10368ASP#35 integrates an 8-channel, 10-bit successive-approximation ADC with internal 1.45 V reference voltage and temperature sensor. The analog inputs include ANI0–ANI3 and ANI16–ANI22, though only eight are accessible in the 20-pin TSSOP package. This resolution and channel count support precision voltage monitoring, thermistor-based temperature sensing, and multi-sensor data acquisition in compact embedded systems.