C8051F226

Overview

The C8051F226 is an 8-bit mixed-signal microcontroller from Silicon Labs, featuring a CIP-51 core with up to 25 MHz throughput. It integrates 8 kB of in-system programmable Flash memory and 1.25 kB of SRAM (including 1024 bytes XRAM). The device includes an 8-bit SAR ADC with up to 32 channels and 100 ksps conversion rate, two comparators, hardware UART, SPI bus, three 16-bit timers, and a watchdog timer. It operates on a 2.7 V to 3.6 V supply within a -40 °C to +85 °C temperature range.

Feature Summary

• Integrated 8-bit SAR ADC with multiplexer supporting up to 32 analog input channels
• Hardware-implemented UART and SPI serial communication interfaces
• On-chip JTAG debug circuitry enabling full-speed non-intrusive system debugging
• In-circuit reprogrammable Flash memory for code and data storage

Applications

• Data acquisition systems requiring multi-channel analog signal monitoring
• Industrial control applications utilizing hardware serial communication
• Portable instrumentation powered by low-voltage supplies
• Sensor interface circuits with comparator-based threshold detection

Procurement Notes

Verify the specific package variant against the required footprint, as the family offers both TQFP-48 and LQFP-32 options. Confirm that the 8-bit ADC resolution meets application requirements, distinguishing this model from the 12-bit 'F206 variant. Ensure development tools support the CIP-51 architecture for programming and debugging workflows.

Selection Notes

Select this component when a fully integrated mixed-signal MCU is needed without external ADCs or level shifters. The inclusion of 5 V tolerant I/O simplifies interfacing with legacy digital logic. Consider the available XRAM size for applications requiring significant internal data buffering beyond standard RAM limits.

Part Context

This part belongs to the C8051F2xx family of System-on-Chip MCUs. It shares the same core architecture and peripheral set as the C8051F206 and C8051F236, differing primarily in ADC resolution and specific memory configurations. The family emphasizes high integration and ease of use through on-chip debug capabilities.

Replacement Considerations

Public confirmed substitute part numbers: None identified.