C8051F231R

Overview

The C8051F231R is a mixed-signal System-on-Chip microcontroller from Silicon Labs, featuring an 8051-compatible core with up to 25 MIPS throughput at a 25 MHz clock. It integrates 8 kB of in-system programmable Flash memory and 1024 bytes of XRAM. The device includes hardware UART and SPI interfaces, three 16-bit timers, and a watchdog timer. Analog peripherals consist of an 8-bit SAR ADC with up to 100 ksps sampling rate and two comparators. It operates on a 2.7 V to 3.6 V supply within a -40°C to +85°C temperature range.

Feature Summary

• Fully integrated mixed-signal SoC with high-speed pipelined 8051 core
• In-system programmable Flash memory for field upgrades
• On-chip JTAG debug circuitry for non-intrusive system debugging
• Hardware-implemented UART and SPI serial communication interfaces

Applications

• Data acquisition systems requiring analog signal processing
• Industrial control applications with sensor interfacing
• Portable instruments utilizing low-power operation modes
• Embedded systems needing reliable in-circuit reprogrammability

Procurement Notes

Verify the specific suffix 'R' against the manufacturer's official documentation to confirm tape-and-reel packaging specifications. Ensure the component matches the exact revision level required for your design. Cross-reference the part number with authorized distributors to confirm current availability status. Validate that the ordering code aligns with the intended package type and temperature grade.

Selection Notes

Select this model when an 8-bit resolution ADC is sufficient for the application, as higher-resolution variants exist within the same family. Consider the 1024-byte XRAM capacity for data storage requirements. Evaluate the 25 MHz maximum clock speed against processing demands. Confirm that the 32-pin LQFP package fits the physical constraints of the target PCB layout.

Part Context

This component belongs to the C8051F2xx family of fully integrated mixed-signal microcontrollers. The family shares a common architecture but varies in ADC resolution and memory configuration. The C8051F231R specifically denotes the variant with 8-bit ADC resolution and 32-pin packaging. It is designed for applications requiring a balance of analog performance and digital processing capabilities.

Replacement Considerations

Consult the official product selection guide for direct pin-to-pin compatible alternatives within the C8051F2xx series. Verify if other members of the family offer different ADC resolutions or memory sizes that better suit the application. Check for any newer generations or automotive-grade equivalents if enhanced reliability is required.