Renesas R5F1027AANA#45

Overview

R5F1027AANA#45 from Renesas Electronics is a 24-pin HWQFN-packaged RL78/G12 16-bit microcontroller designed for ultra-low-power embedded control in consumer-grade applications (–40°C to +85°C). It integrates 16 KB code flash, 2 KB data flash, 1.5 KB RAM, a 24 MHz high-accuracy on-chip oscillator (±1.0% over –20°C to +85°C), and supports 11-channel 10-bit A/D conversion with internal reference voltage (1.45 V) and temperature sensor.

For engineers reviewing the R5F1027AANA#45 datasheet, R5F1027AANA#45 pinout, R5F1027AANA#45 application, or R5F1027AANA#45 equivalent, key selection considerations include its 24-pin HWQFN (4 × 4 mm, 0.5 mm pitch) footprint, dual CSI/I²C serial interfaces, 2-channel DMA, CRC hardware acceleration, and support for SNOOZE/HALT/STOP low-power modes - critical for battery-powered sensing and appliance control designs.

Technical Context

The R5F1027AANA#45 implements the RL78 CPU core with a 3-stage pipeline CISC architecture, delivering 31 DMIPS at 24 MHz while maintaining 63 μA/MHz active current consumption. Its memory subsystem includes 16 KB code flash (1 KB block size), 2 KB data flash with background operation (BGO) and 1M write cycles, and 1.5 KB SRAM - all accessible under single-supply 1.8–5.5 V operation.

Peripheral integration centers on mixed-signal control: four 16-bit TAU timer channels, one 12-bit interval timer, one window watchdog timer, programmable clock/buzzer output (2.44 kHz–10 MHz), and flexible I/O with N-ch open-drain capability (6 V tolerant on two pins). The device supports peripheral I/O redirection via PIOR register for dynamic pin function assignment.

Key Specifications

Pinout & Package

Package: HWQFN-24 (4 × 4 mm, 0.5 mm pitch), exposed die pad (to be connected to VSS), compliant with JEDEC MO-220.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F1027ADNA#45 and R5F1037AANA#45, the R5F1027AANA#45 delivers optimal balance of consumer-grade cost, integrated data flash for field updates, and hardware CRC for firmware integrity - making it ideal for upgradable, battery-conscious edge devices where industrial-grade specs are unnecessary.

Availability

R5F1027AANA#45 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, consumer IoT gateways, and smart lighting controllers requiring stable component supply and long-term production continuity.

Supply support for R5F1027AANA#45 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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G12 product line is engineered for ultra-low-power general-purpose embedded control, targeting cost-sensitive, battery-operated, and thermally constrained applications where energy efficiency and integrated analog peripherals are critical.

FAQ

What is the maximum operating frequency and instruction throughput of the R5F1027AANA#45?

The R5F1027AANA#45 operates at up to 24 MHz using its high-speed on-chip oscillator, achieving 31 DMIPS (Dhrystone MIPS) performance. Its minimum instruction execution time is 0.04167 μs at 24 MHz, enabled by the RL78 CPU core's 3-stage pipeline architecture. This throughput supports real-time control loops in motor drives and sensor fusion applications without external acceleration.

Does the R5F1027AANA#45 support in-system programming and data retention during power loss?

Yes, the R5F1027AANA#45 supports self-programming of its 16 KB code flash and 2 KB data flash via on-chip libraries. The data flash provides 1,000,000 write cycles and operates down to 1.8 V, enabling reliable parameter storage and firmware updates even during brown-out conditions. The R5F1027AANA#45 includes flash shield window protection to prevent unauthorized access to stored data.

How many analog input channels does the R5F1027AANA#45 support, and what reference options are available?

The R5F1027AANA#45 integrates an 11-channel 10-bit A/D converter supporting analog inputs ANI0–ANI3 and ANI16–ANI22. It offers internal reference voltage (1.45 V) and supports external references via AVREFP/AVREFM pins. The converter operates across the full 1.8–5.5 V supply range, eliminating need for external voltage references in most thermal and environmental sensing applications.

What low-power modes are implemented in the R5F1027AANA#45, and what are their typical current draws?

The R5F1027AANA#45 implements HALT (63 μA/MHz), STOP (0.52 μA typical), and SNOOZE modes. In STOP mode, the device retains RAM and register contents while disabling the CPU and most peripherals, drawing less than 1 μA with RTC active. SNOOZE allows selected peripherals (e.g., ADC, UART) to operate autonomously while the CPU sleeps, enabling rapid wake-up for event-driven sensing.

Is the R5F1027AANA#45 pin-compatible with other RL78/G12 variants, and what packaging options exist?

The R5F1027AANA#45 uses a 24-pin HWQFN (4 × 4 mm, 0.5 mm pitch) package with exposed die pad. It shares identical pinout with other R5F1027x and R5F1037x variants in the same package family (e.g., R5F1027ADNA#45, R5F1037AANA#45), enabling drop-in replacement within the same temperature grade. Tape-and-reel (#W5, #45) and tray (#U5, #05) packaging options are available for automated assembly.