Renesas R5F1026AASP#55

Overview

R5F1026AASP#55 from Renesas Electronics is a 20-pin LSSOP ultra-low-power 16-bit RL78/G12 microcontroller designed for cost-sensitive consumer applications. It integrates 16 KB code flash, 2 KB data flash, 1.5 KB RAM, 10-bit 11-channel ADC, and operates from 1.8 V to 5.5 V with true low-power consumption (63 μA/MHz). It delivers 31 DMIPS at 24 MHz and supports HALT/STOP/SNOOZE modes - ideal for battery-powered remote controls and sensor nodes.

For engineers reviewing the R5F1026AASP#55 datasheet, R5F1026AASP#55 pinout, R5F1026AASP#55 application, or R5F1026AASP#55 equivalent, key selection criteria include its 2 KB data flash with background operation (BGO), 2-channel DMA, CRC hardware accelerator, and ±1.0% high-speed on-chip oscillator accuracy over –20°C to +85°C - critical for timing-critical embedded control without external crystal.

Technical Context

The R5F1026AASP#55 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and 1 MB address space. It features dual-oscillator support: high-speed on-chip oscillator (1–24 MHz, ±1.0% accuracy) and 15 kHz low-speed on-chip oscillator, enabling flexible clock domain management for power-aware firmware design.

Its peripheral set includes UART0, two CSI channels (SPI-compatible), two simplified I²C channels, four 16-bit TAU timer channels with PWM capability, and dedicated key interrupt inputs (KR0–KR5). All peripherals are accessible via 18 I/O pins, including two 6-V-tolerant N-ch open-drain outputs and analog inputs with internal 1.45 V reference and temperature sensor.

Key Specifications

Pinout & Package

LSSOP-20 package (PLSP0020JB-A), 4.4 mm × 6.5 mm body, 0.65 mm lead pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F1036AASP#55, the R5F1026AASP#55 provides essential data persistence and timing reliability for firmware updates and sensor calibration; versus R5F1027AANA#U5, it trades I/O count and thermal margin for lower assembly cost and LSSOP compatibility with legacy through-hole tooling.

Availability

R5F1026AASP#55 is available at Aetrix Electronics and suitable for home appliance remotes, smart thermostat sensor nodes, industrial panel meters, and USB-C power monitors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R5F1026AASP#55 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 delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications, with annual revenue exceeding $10 billion.

The RL78/G12 product line targets cost-optimized, ultra-low-power general-purpose microcontrollers for consumer electronics and industrial controls - emphasizing energy efficiency, integrated analog, and simplified development.

FAQ

What is the maximum operating frequency of the R5F1026AASP#55?

The R5F1026AASP#55 supports a maximum high-speed on-chip oscillator frequency of 24 MHz, delivering 31 DMIPS performance. When using an external crystal (X1/X2), the maximum main system clock frequency is 20 MHz at VDD ≥ 2.7 V or 16 MHz at VDD ≥ 2.4 V. The minimum instruction execution time is 0.04167 µs under 24 MHz on-chip oscillator operation.

Does the R5F1026AASP#55 support background data flash rewriting?

Yes, the R5F1026AASP#55 includes 2 KB of data flash memory with background operation (BGO) capability. This allows the CPU to execute instructions from program memory while simultaneously rewriting data flash - enabling real-time logging, firmware parameter updates, and configuration storage without interrupting application flow.

What are the key differences between R5F1026AASP#55 and R5F1036AASP#55?

The R5F1026AASP#55 includes 2 KB data flash, ±1.0% high-speed oscillator accuracy, 2-channel DMA, hardware CRC, and dual CSI/simplified I²C interfaces - features absent in the R5F1036AASP#55. The latter omits data flash and advanced peripherals to reduce cost and silicon area, targeting simpler control applications where those capabilities are unnecessary.

Can the R5F1026AASP#55 operate from a 1.8 V supply?

Yes, the R5F1026AASP#55 is fully specified for operation from 1.8 V to 5.5 V. At 1.8 V, it supports low-speed main system clock up to 8 MHz and maintains full functionality including ADC, timers, and serial interfaces - making it suitable for single-cell Li-ion or alkaline battery systems with minimal regulation.

How many analog input channels does the R5F1026AASP#55 support?

The R5F1026AASP#55 supports 11 analog input channels: ANI0–ANI3 and ANI16–ANI22. It features a 10-bit successive approximation ADC with internal 1.45 V reference voltage and integrated temperature sensor - enabling direct thermal monitoring without external components.