Renesas R5F10277ANA#25

Overview

R5F10277ANA#25 from Renesas Electronics is a 24-pin HWQFN-packaged RL78/G12 16-bit microcontroller with 4 KB code flash, 2 KB data flash, and 512 B RAM, operating at 1.8–5.5 V and delivering 31 DMIPS at 24 MHz. It integrates an ultra-low-power CPU core (63 μA/MHz), 10-bit 11-channel ADC, dual CSI/I²C serial interfaces, UART, 4-channel 16-bit TAU timer, DMA controller, and on-chip debug - deployed in battery-powered sensor nodes and industrial control panels.

For engineers reviewing the R5F10277ANA#25 datasheet, R5F10277ANA#25 pinout, R5F10277ANA#25 application, or R5F10277ANA#25 equivalent, this page delivers verified electrical specs, validated package mapping to PWQN0024KF-A, confirmed 24-pin HWQFN pin functions, and two rigorously cross-checked alternative parts for low-voltage embedded designs requiring data flash persistence and integrated safety features.

Technical Context

The R5F10277ANA#25 implements the RL78 CISC CPU core with 3-stage pipeline, 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 memory subsystem includes 4 KB code flash (1 KB block size), 2 KB data flash with background operation (BGO) and 1M rewrite cycles, and 512 B RAM - all accessible within a 1 MB address space.

Peripherals are tightly coupled to power management: HALT/STOP/SNOOZE modes enable dynamic current scaling; the 12-level voltage detector (LVD) supports programmable reset/interrupt thresholds; and CRC, RAM guard, and SFR guard provide hardware-level safety for industrial firmware integrity. The device operates across –40°C to +85°C (A-grade) with ±1.0% high-speed oscillator accuracy over –20°C to +85°C.

Key Specifications

Pinout & Package

Packaged in a 24-pin plastic HWQFN (PWQN0024KF-A) 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 R5F10277ANA#25, R5F10278ANA#25 offers scalable code storage without sacrificing data retention or safety features, while R5F10377ANA#25 trades those capabilities for lower unit cost and simpler qualification - making each viable for distinct production tiers.

Availability

R5F10277ANA#25 is available at Aetrix Electronics and suitable for smart home hubs, portable medical devices, industrial motor controllers, and energy meter communication modules requiring stable component supply, long-term lifecycle support, and guaranteed data flash reliability.

Supply support for R5F10277ANA#25 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 targets cost-sensitive, ultra-low-power embedded applications requiring integrated analog peripherals, robust safety features, and seamless migration from 8-bit platforms - with R5F10277ANA#25 optimized for 24-pin space-constrained designs.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F10277ANA#25?

The R5F10277ANA#25 achieves a maximum operating frequency of 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS of processing performance. This benchmark is measured under standard conditions (VDD = 2.7–5.5 V, TA = –40°C to +85°C) and reflects the RL78 core's efficiency in executing real-world embedded workloads including sensor polling, PID control, and protocol stack processing.

Does the R5F10277ANA#25 include on-chip data flash memory, and what are its endurance specifications?

Yes, the R5F10277ANA#25 integrates 2 KB of on-chip data flash memory rated for 1,000,000 write/erase cycles (typical) across the full 1.8–5.5 V supply range. It supports background operation (BGO), allowing program execution from code flash while rewriting data flash - a critical capability for reliable firmware-over-the-air updates in the R5F10277ANA#25.

What safety features are implemented in the R5F10277ANA#25, and how do they differ from the R5F10377ANA#25?

The R5F10277ANA#25 includes CRC calculation hardware, RAM guard, and SFR guard - all absent in the R5F10377ANA#25. These features detect memory corruption and unauthorized register writes, enabling IEC 61508-compliant designs. The R5F10277ANA#25's safety mechanisms are validated in Renesas' functional safety documentation and directly support SIL2-capable implementations.

Can the R5F10277ANA#25 operate from a 1.8 V supply, and what peripherals remain functional at that voltage?

Yes, the R5F10277ANA#25 is fully specified for operation from 1.8 V to 5.5 V. At 1.8 V, all core functions - including the 10-bit 11-channel ADC (with internal 1.45 V reference), 4-channel 16-bit TAU timer, dual CSI/I²C interfaces, UART, and DMA controller - remain operational. The high-speed on-chip oscillator supports 1 MHz minimum frequency at 1.8 V, ensuring deterministic timing down to the lowest supply.

What package type and footprint does the R5F10277ANA#25 use, and are there any PCB layout requirements?

The R5F10277ANA#25 uses a 24-pin HWQFN package (PWQN0024KF-A) with 4 mm × 4 mm body and 0.5 mm pitch. Critical layout requirements include connecting the exposed die pad to VSS with ≥3 thermal vias, placing a 0.1 µF ceramic capacitor between VDD and VSS near the power pins, and routing analog inputs (ANI0–ANI3, ANI16–ANI22) away from digital switching traces to maintain ADC accuracy in the R5F10277ANA#25.