R5F2121CJFP#U0

Microcontrollers Overview

The R5F2121CJFP#U0 is a 16-bit microcontroller from the Renesas R8C/21 series, built on the R8C CPU core. It features 32KB of flash memory and 2KB of data RAM. The device operates at a maximum clock frequency of 20MHz with a supply voltage range of 2.7V to 5.5V. It includes an integrated 10-bit A/D converter and supports UART/USART communication interfaces. The component is housed in a 48-LQFP package.

Microcontrollers Feature Summary

• Integrates a high-performance 16-bit R8C CPU core for efficient instruction execution.
• Includes on-chip flash memory for program storage and data retention capabilities.
• Features a 10-bit analog-to-digital converter for signal processing applications.
• Supports serial communication via integrated UART/USART modules.

Microcontrollers Applications

• Industrial control systems requiring robust 16-bit processing
• Consumer appliances utilizing embedded logic and sensor interfacing
• Automotive subsystems compatible with standard automotive temperature ranges

Microcontrollers Procurement Notes

Verify current availability status directly with authorized distributors or the manufacturer, as legacy components may have limited stock or end-of-life implications. Confirm that the specific suffix matches your design requirements. Ensure compliance with RoHS directives and check moisture sensitivity levels prior to PCB assembly to prevent damage during reflow soldering processes.

Microcontrollers Selection Notes

Select this component when a balance of moderate memory capacity and peripheral integration is required for cost-sensitive 16-bit applications. Consider the 48-pin LQFP package constraints for board layout. Evaluate if the 20MHz speed and 2.7V-5.5V operating range align with system power and timing specifications compared to newer RL78 alternatives.

Microcontrollers Part Context

This part belongs to the R8C/21 family within the broader R8C microcontroller portfolio. The R8C series is designed for general-purpose embedded control tasks. This specific model represents a mid-range configuration within the group, offering sufficient resources for complex control loops while maintaining compatibility with established development tools and libraries associated with the R8C architecture.

Microcontrollers Replacement Considerations

Renesas recommends transitioning to the RL78/G14 Group for new designs. Verify pinout and register compatibility before substituting with other R8C variants or migrating to the RL78 family, as architectural differences may require firmware adjustments.