Renesas R5F21276SNFP#X6

Overview

R5F21276SNFP#X6 from Renesas Electronics is a 16-bit R8C/27 Group single-chip microcontroller with 32 KB flash program memory, 1.5 KB RAM, and dual 1 KB data flash blocks. It features a 20 MHz max operating frequency (VCC = 3.0–5.5 V), 10-bit 12-channel ADC, hardware LIN module, and real-time clock functionality via Timer RE. It targets embedded control in consumer appliances and industrial equipment requiring nonvolatile data logging.

For engineers reviewing the R5F21276SNFP#X6 datasheet, R5F21276SNFP#X6 pinout, R5F21276SNFP#X6 application, or R5F21276SNFP#X6 equivalent, key selection criteria include its N-version temperature range (−20 to +85°C), 32-pin LQFP package (PLQP0032GB-A), on-chip data flash endurance (10,000 erase/write cycles), and integrated LIN 2.0-compliant transceiver logic.

Technical Context

The R5F21276SNFP#X6 implements the R8C CPU core with 89 fundamental instructions and supports register bank switching for efficient context handling. Its memory architecture includes separate 1 Mbyte address space for code and data, with fixed interrupt vector table at 0FFDCh–0FFFFh and SFRs mapped to 00000h–002FFh.

Peripheral integration centers on mixed-signal timing and communication: Timer RC provides 16-bit input capture/output compare; UART0 and UART1 support full-duplex asynchronous serial; I²C bus interface enables slave/master operation; and the hardware LIN module uses UART0 and Timer RA for protocol timing and checksum generation.

Key Specifications

Pinout & Package

Package: 32-pin molded-plastic LQFP (PLQP0032GB-A), 7 mm × 7 mm, 0.8 mm pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F21276SNFP#X6, R5F21276SDFP extends ambient operating range for harsh environments while maintaining identical functionality, whereas R5F21274SNFP reduces memory capacity to lower unit cost-both preserve pin compatibility and software portability across the R8C/27 Group.

Availability

R5F21276SNFP#X6 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, and office equipment motor control requiring stable component supply and long-term production continuity.

Supply support for R5F21276SNFP#X6 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, and power solutions for industrial, automotive, and consumer markets.

The R8C/27 Group, including R5F21276SNFP#X6, was designed for cost-effective, low-power embedded control in appliances and industrial equipment-emphasizing integrated peripherals, data retention, and ease of certification.

FAQ

What is the maximum clock frequency supported by the R5F21276SNFP#X6?

The R5F21276SNFP#X6 supports a maximum operating frequency of 20 MHz when powered at VCC = 3.0–5.5 V. At this speed, minimum instruction execution time is 50 ns. Lower frequencies (16 MHz, 10 MHz, 5 MHz) are supported across reduced voltage ranges, enabling flexible power/performance trade-offs in battery-powered applications.

Does the R5F21276SNFP#X6 include on-chip data flash memory?

Yes, the R5F21276SNFP#X6 includes two 1 KB data flash blocks, part of the R8C/27 Group's distinguishing feature versus the R8C/26 Group. These blocks support 10,000 erase/write cycles and operate at the same VCC range (2.7–5.5 V) as program flash, enabling reliable storage of calibration data, device configuration, or firmware update staging.

What is the operating temperature range for the R5F21276SNFP#X6?

The R5F21276SNFP#X6 is an N-version device with an operating ambient temperature range of −20°C to +85°C. This rating aligns with Renesas' "Standard" quality grade and is validated for use in consumer electronics, office equipment, and indoor industrial controls-not for automotive under-hood or extended-temperature industrial deployments.

How many analog input channels does the R5F21276SNFP#X6 support?

The R5F21276SNFP#X6 integrates a 10-bit successive-approximation A/D converter with 12 analog input channels (AN0–AN11). These channels are multiplexed across GPIO pins P0_0–P0_7, P1_0–P1_3, and P3_3, and can be sampled simultaneously or sequentially under software or timer trigger control.

Is the R5F21276SNFP#X6 pin-compatible with other R8C/27 Group MCUs?

Yes, all R8C/27 Group MCUs-including R5F21272SNFP, R5F21274SNFP, R5F21275SNFP, and R5F21276SNFP-share identical 32-pin LQFP (PLQP0032GB-A) packaging and pin assignments. Firmware and hardware designs are interchangeable across memory variants, enabling scalable product families with minimal layout changes.