Renesas R5F21244SDFP#V2

Overview

R5F21244SDFP#V2 from Renesas Electronics is a 16-bit R8C/Tiny Series single-chip microcontroller with 16 KB flash ROM, 1 KB RAM, and 52-pin LQFP (PLQP0052JA-A) package. It operates from 2.2 V to 5.5 V, delivers 50 ns minimum instruction execution at 20 MHz, and integrates UART, I²C, LIN, 12-channel 10-bit ADC, and real-time clock - used in industrial control panels requiring deterministic timing and low-power operation.

For engineers reviewing the R5F21244SDFP#V2 datasheet, R5F21244SDFP#V2 pinout, R5F21244SDFP#V2 application, or R5F21244SDFP#V2 equivalent, key selection criteria include its -40°C to +85°C D-version temperature rating, on-chip high-speed oscillator with frequency adjustment, wait/stop mode current down to 2.0 µA / 0.7 µA, and hardware LIN module supporting automotive body electronics diagnostics.

Technical Context

The R5F21244SDFP#V2 implements the R8C/Tiny CPU core with 89 fundamental instructions and 1 Mbyte address space. Its peripheral set includes two UART channels, one I²C interface, one clock-synchronous serial I/O with chip select, and a dedicated hardware LIN module built from Timer RA and UART0 resources.

It features three independent clock generation circuits: XIN-based crystal/resonator input (up to 20 MHz), high-speed on-chip oscillator with programmable frequency tuning, and XCIN-based 32 kHz real-time clock source. Oscillation stop detection and on-chip power-on reset ensure robust startup under varying supply conditions.

Key Specifications

Pinout & Package

Package: 52-pin LQFP (PLQP0052JA-A), 10 mm × 10 mm, 0.65 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21244SDFP#V2, R5F21245SDFP#V2 offers scalable code space within identical footprint and timing, while R5F21254SDFP#V2 trades program ROM endurance for dedicated data retention - both require validation of flash programming algorithms and debug interface compatibility.

Availability

R5F21244SDFP#V2 is available at Aetrix Electronics and suitable for industrial control panels, automotive body controllers, and smart appliance control boards requiring stable component supply across extended product lifecycles.

Supply support for R5F21244SDFP#V2 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 industrial, automotive, and IoT markets.

The R8C/24 Group, including R5F21244SDFP#V2, was designed for cost-sensitive, low-power embedded systems requiring rich peripheral integration - especially where LIN, ADC, and real-time clock functionality are essential.

FAQ

What is the maximum operating frequency supported by the R5F21244SDFP#V2?

The R5F21244SDFP#V2 supports a maximum external clock frequency of 20 MHz on the XIN pin, achieving a minimum instruction execution time of 50 ns at VCC = 3.0–5.5 V. Its on-chip high-speed oscillator can be tuned across a range but does not exceed 20 MHz in specification. The MCU remains fully functional at lower frequencies, including 10 MHz (100 ns min) and 5 MHz (200 ns min), with corresponding reduced supply voltage requirements.

Does the R5F21244SDFP#V2 include an integrated LIN physical layer?

No, the R5F21244SDFP#V2 implements only the LIN protocol stack and timing logic (hardware LIN module using UART0 and Timer RA). It requires an external LIN transceiver such as the ISL72027 or TLE7259-3GE to drive the bus line. The MCU handles frame formatting, checksum calculation, and schedule table management, but physical layer signaling is offloaded to the companion IC.

Can the R5F21244SDFP#V2 operate from a single 3.3 V supply?

Yes, the R5F21244SDFP#V2 operates reliably from a 3.3 V supply across its full -40°C to +85°C temperature range (D version). At 3.0–5.5 V, it supports up to 20 MHz operation; at 2.7–5.5 V, up to 10 MHz; and at 2.2–5.5 V, up to 5 MHz. A 3.3 V rail meets all electrical specifications for typical embedded use cases including UART, ADC, and timer functions.

How many analog input channels does the R5F21244SDFP#V2 support?

The R5F21244SDFP#V2 supports 12 analog input channels (AN0 through AN11), mapped across P0_0–P0_7, P1_0–P1_3, and P4_2. All channels share a single 10-bit successive-approximation ADC with internal reference or external VREF input. Channel selection is software-controlled via the ADCH register, and conversion results are stored in the 16-bit AD result register.

Is the R5F21244SDFP#V2 pin-compatible with other R8C/24 Group devices in the same package?

Yes, all R8C/24 Group devices in the PLQP0052JA-A (52-pin LQFP) package - including R5F21245SDFP#V2, R5F21246SDFP#V2, and R5F21244SNFP#V2 - share identical pin assignments, electrical characteristics, and peripheral mappings. Only flash size, RAM size, and temperature grade differ; no PCB redesign is needed when upgrading within the same package and version (e.g., D to D).