Renesas R5F21335CNFP#50

Overview

R5F21335CNFP#50 from Renesas Electronics is a 16-bit R8C CPU core MCU with 24 KB flash program ROM, 2 KB data flash (4 × 1 KB blocks), and 2 KB RAM in a 32-pin LQFP package. It delivers 50 ns min instruction execution at 20 MHz (V_CC = 2.7–5.5 V), integrates 10-bit × 12-channel A/D, dual 8-bit D/A, LIN hardware module, and supports background operation (BGO) for real-time firmware updates - used in consumer audio control subsystems.

For engineers reviewing the R5F21335CNFP#50 datasheet, R5F21335CNFP#50 pinout, R5F21335CNFP#50 application, or R5F21335CNFP#50 equivalent, key selection criteria include its -20°C to +85°C N-version operating range, 32-pin PLQP0032GB-A package, integrated LIN transceiver timing support, BGO-enabled data flash, and dual UART + I²C + SSU serial interface configuration.

Technical Context

The R5F21335CNFP#50 implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit multiplier, and multiply-accumulate capability. Its memory map spans 1 Mbyte (00000h–FFFFFh), with fixed interrupt vector table at 0FFDCh–0FFFFh and data flash allocated at 03000h–03FFFh.

It features four independent clock sources - XIN/XOUT (up to 20 MHz), XCIN/XCOUT (32 kHz), high-speed on-chip oscillator (adjustable), and low-speed on-chip oscillator - with selectable frequency dividers (1/2/4/8/16) and oscillation stop detection. Power modes include standard, wait (3.5 µA @ 3 V), and stop (2.0 µA @ 3 V).

Key Specifications

Pinout & Package

32-pin LQFP package (PLQP0032GB-A), 7 mm × 7 mm body, 0.8 mm pin pitch, exposed pad not specified. Pin functions include dedicated A/D inputs (AN0–AN11), D/A outputs (DA0/DA1), LIN-compliant TRAIO/TRBO pins, and multi-function serial I/O (SCL2/SDA2, SCL/SDA, SSCK/SSI/SSO).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21335CDFP and R5F21334CNFP, the R5F21335CNFP#50 offers optimal balance of code space (24 KB), data retention (2 KB RAM), and commercial-grade thermal margin - making it ideal for mid-tier consumer audio and appliance control where extended temperature is unnecessary but headroom matters.

Availability

R5F21335CNFP#50 is available at Aetrix Electronics and suitable for audio equipment control, home appliance UI panels, office equipment status monitoring, and consumer audio DAC interface applications requiring stable component supply and long-term production continuity.

Supply support for R5F21335CNFP#50 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 consumer markets.

The R8C/33C Group, including R5F21335CNFP#50, was designed for cost-effective, low-power embedded control in consumer electronics - emphasizing integration of analog peripherals, LIN connectivity, and robust flash programming capabilities.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for the R5F21335CNFP#50?

The R5F21335CNFP#50 operates at up to 20 MHz when supplied with 2.7–5.5 V, achieving a minimum instruction execution time of 50 ns. At lower frequencies (e.g., 5 MHz), it supports down to 1.8 V, enabling ultra-low-power operation in battery-powered consumer devices while maintaining full peripheral functionality.

Does the R5F21335CNFP#50 support in-system programming and background operation for data flash?

Yes, the R5F21335CNFP#50 supports background operation (BGO) for its 1 KB × 4 data flash blocks. This allows the CPU to execute application code while simultaneously erasing or programming data flash - essential for logging runtime parameters or updating calibration tables without interrupting system operation.

What serial communication interfaces are integrated into the R5F21335CNFP#50?

The R5F21335CNFP#50 integrates UART0 and UART1 (full-duplex asynchronous), UART2 with configurable I²C-bus mode and multiprocessor communication, a dedicated I²C bus interface, SSU (synchronous serial unit), and a hardware LIN module built around Timer RA and UART0 - supporting mixed-protocol communication in compact consumer systems.

How many analog-to-digital and digital-to-analog channels does the R5F21335CNFP#50 provide?

The R5F21335CNFP#50 provides a 10-bit resolution A/D converter with 12 input channels (AN0–AN11), including sample-and-hold and sweep mode. It also includes two independent 8-bit D/A converters (DA0 and DA1), routed to P0_6 and P0_7, usable for analog biasing, audio signal generation, or sensor calibration references.

What is the package type and pin count of the R5F21335CNFP#50, and is it RoHS compliant?

The R5F21335CNFP#50 uses a 32-pin LQFP package (PLQP0032GB-A), measuring 7 mm × 7 mm with 0.8 mm pin pitch. As a Renesas product released post-2006 and documented in Rev 1.00 (2010), it conforms to RoHS Directive 2011/65/EU - lead-free, halogen-free, and compliant with JEDEC J-STD-020 moisture sensitivity level 3.