Renesas R5F1027AGNA#W5

Overview

R5F1027AGNA#W5 from Renesas is a 24-pin HWQFN-packaged RL78/G12 16-bit microcontroller designed for industrial embedded control at extended temperature (–40°C to +105°C). It integrates 16 KB code flash, 2 KB data flash, 1.5 KB RAM, 11-channel 10-bit ADC, dual CSI/I²C interfaces, UART, 4-channel TAU timer, and DMA-enabling low-power sensor node and motor control applications.

For engineers reviewing the R5F1027AGNA#W5 datasheet, R5F1027AGNA#W5 pinout, R5F1027AGNA#W5 application, or R5F1027AGNA#W5 equivalent, key selection criteria include its G-grade industrial temp rating, on-chip data flash with 1M rewrite cycles, 63 μA/MHz active power, and hardware CRC for functional safety compliance in IEC 60730-class B designs.

Technical Context

The R5F1027AGNA#W5 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.04167 μs (24 MHz high-speed on-chip oscillator) to 1 μs (1 MHz ultra-low-speed mode). Its clock system includes selectable high-speed on-chip oscillator (±1.0% accuracy from –20°C to +85°C), low-speed 15 kHz on-chip oscillator, and external crystal support up to 20 MHz.

Peripheral integration centers on dual SAU0 channels supporting CSI, I²C, and UART protocols simultaneously; 4-channel 16-bit TAU timer with PWM capability; and 2-channel DMA enabling background data flash rewrites via BGO while executing code from flash. Safety features include CRC calculation unit, RAM guard, and SFR guard-exclusive to R5F102-series devices.

Key Specifications

Pinout & Package

Package: HWQFN-24 (4 mm × 4 mm, 0.5 mm pitch) with exposed die pad connected to VSS per datasheet recommendation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F1027ADNA#W5, the R5F1027AGNA#W5 adds extended temperature qualification critical for harsh environments; compared with R5F1037AGNA#W5, it provides essential data flash endurance and hardware safety accelerators absent in the R5F103 series.

Availability

R5F1027AGNA#W5 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, appliance UI panels, and factory automation I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F1027AGNA#W5 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 markets.

The RL78/G12 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive industrial and consumer control applications requiring extended temperature operation and integrated safety features.

FAQ

What is the maximum operating frequency of the R5F1027AGNA#W5's high-speed on-chip oscillator?

The R5F1027AGNA#W5 supports high-speed on-chip oscillator frequencies up to 24 MHz with ±1.0% accuracy over –20°C to +85°C ambient. This enables 31 DMIPS performance at 24 MHz while maintaining ultra-low power consumption of 63 μA/MHz-ideal for real-time control loops in industrial applications where external crystal cost and board space must be minimized.

Does the R5F1027AGNA#W5 support background data flash rewriting?

Yes, the R5F1027AGNA#W5 supports Background Operation (BGO) for data flash rewriting. This allows the CPU to execute instructions from program memory while simultaneously erasing or programming the 2 KB data flash-enabling seamless firmware updates or parameter storage without interrupting real-time tasks. The data flash guarantees 1,000,000 rewrite cycles at VDD = 1.8–5.5 V.

What safety features does the R5F1027AGNA#W5 include for IEC 60730 compliance?

The R5F1027AGNA#W5 includes hardware CRC calculation, RAM guard, and SFR guard-features exclusive to the R5F102 series and critical for IEC 60730 Class B compliance. These accelerate functional safety diagnostics by detecting memory corruption and ensuring register integrity without software overhead, reducing certification effort for household appliance and industrial control applications.

Can the R5F1027AGNA#W5 operate from a single 1.8 V supply?

Yes, the R5F1027AGNA#W5 operates across a wide voltage range of 1.8 V to 5.5 V. At 1.8 V, it supports LS (low-speed main) mode up to 8 MHz and maintains full peripheral functionality including 10-bit ADC, UART, and timers-enabling direct interface with 1.8 V logic families and extending battery life in portable industrial tools and wireless sensors.

What is the purpose of the exposed die pad on the R5F1027AGNA#W5 HWQFN package?

The exposed die pad on the R5F1027AGNA#W5 HWQFN-24 package must be connected to VSS per Renesas datasheet guidance. This connection improves thermal dissipation to maintain junction temperature within limits during sustained 24 MHz operation and reduces high-frequency noise coupling into sensitive analog circuits like the 10-bit ADC and internal voltage references.