Renesas R5F10277GNA#65

Overview

R5F10277GNA#65 from Renesas Electronics is a 24-pin HWQFN-packaged RL78/G12 16-bit microcontroller designed for industrial embedded control. It integrates 4 KB code flash, 2 KB data flash, 256 B RAM, 10-bit A/D converter (11 channels), and operates from 1.8 V to 5.5 V across –40°C to +105°C ambient temperature - enabling use in motor control, sensor nodes, and smart appliances requiring robust low-power operation.

For engineers reviewing the R5F10277GNA#65 datasheet, R5F10277GNA#65 pinout, R5F10277GNA#65 application, or R5F10277GNA#65 equivalent, key selection criteria include its G-grade industrial temperature rating, on-chip data flash for parameter storage, dual CSI/I²C serial interfaces, 2-channel DMA, and CRC hardware acceleration - all within a compact 4 × 4 mm HWQFN package.

Technical Context

The R5F10277GNA#65 implements the RL78 CPU core with 3-stage pipeline CISC architecture, delivering 31 DMIPS at 24 MHz while consuming only 63 μA/MHz in active mode. Its peripheral set includes two simplified SPI (CSI) channels, two simplified I²C channels, one UART, four 16-bit timer channels, and a window watchdog timer - all supported by dedicated interrupt vectors and programmable priority levels.

It features a high-accuracy ±1.0% high-speed on-chip oscillator (1–24 MHz), low-speed 15 kHz on-chip oscillator, and supports multiple low-power modes (HALT, STOP, SNOOZE). The device includes safety-oriented functions such as RAM guard, SFR guard, and CRC calculation unit - confirming its suitability for functional-safety-aware industrial firmware designs.

Key Specifications

Pinout & Package

Package: HWQFN-24, 4 × 4 mm, 0.5 mm pitch, exposed die pad (to be connected to VSS). Pin count: 24. Pin compatibility confirmed per Renesas datasheet R01DS0193EJ0250 Rev.2.50, Page 8 (24-pin top view).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10277GNA#65, R5F1027AGNA#65 offers scalable code density without design change, while R5F10377GNA#65 sacrifices data retention and safety features for lower unit cost - making the original part optimal for applications needing field-updatable parameters and functional safety awareness.

Availability

R5F10277GNA#65 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, HMI panels, and appliance power management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F10277GNA#65 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 ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and thermally demanding industrial applications - emphasizing integrated analog, robust safety features, and seamless toolchain support.

FAQ

What is the operating temperature range of the R5F10277GNA#65?

The R5F10277GNA#65 is rated for industrial operation from –40°C to +105°C (G-grade), validated per Renesas datasheet R01DS0193EJ0250. This makes it suitable for deployment in environments such as motor drive enclosures, outdoor sensor housings, and industrial control cabinets where ambient temperatures exceed standard commercial limits. The device maintains full functionality and timing specifications across this entire range.

Does the R5F10277GNA#65 include on-chip data flash memory?

Yes, the R5F10277GNA#65 integrates 2 KB of on-chip data flash memory, confirmed in the RL78/G12 datasheet Section 1.1 and Table 1-1. This memory supports background operation (BGO), enabling firmware to execute from code flash while rewriting data flash - ideal for storing calibration coefficients, device IDs, or user settings without halting real-time tasks.

How many serial communication interfaces does the R5F10277GNA#65 support?

The R5F10277GNA#65 supports two simplified SPI (CSI) channels, two simplified I²C channels, and one UART channel - as specified in Section 1.7 "Outline of Functions" of the datasheet. These interfaces are physically mapped to Port 0, Port 1, and Port 4 pins and can operate concurrently, allowing simultaneous communication with SPI sensors, I²C EEPROMs, and host controllers.

Is the R5F10277GNA#65 pin-compatible with other RL78/G12 24-pin variants?

Yes, the R5F10277GNA#65 shares identical pinout and package (HWQFN-24, PWQN0024KF-A) with all other R5F1027x and R5F1037x variants in the 24-pin family, per Figure 1-1 and Table 1-1 of the datasheet. However, functional differences exist - e.g., R5F1037x parts omit data flash and safety features - so firmware and schematic validation is required before substitution.

What low-power modes are available on the R5F10277GNA#65?

The R5F10277GNA#65 supports HALT, STOP, and SNOOZE low-power modes. HALT stops the CPU but keeps peripherals active; STOP disables the main clock and reduces current to ~0.52 μA; SNOOZE allows selected peripherals (e.g., ADC, UART) to operate while the CPU sleeps - with background data flash writes enabled. All modes are documented in Section 1.1 "Features" of the datasheet.