C8051F814-GU

Overview

The C8051F814-GU is an 8-bit mixed-signal microcontroller from Silicon Labs, based on the CIP-51 core. It features 8 kB of Flash memory and 512 bytes of internal data RAM. The device supports a maximum clock frequency of 25 MHz and includes a 10-bit ADC with up to 16 external single-ended inputs. It provides 17 I/O ports and integrates capacitive touch sensing capabilities. Operating voltage ranges from 1.8 V to 3.6 V, and it is housed in a QSOP-24 package.

Feature Summary

• Integrated Capacitance to Digital Converter supporting buttons, sliders, wheels, and proximity sensing with auto-scan and wake-on-touch functionality.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without requiring external emulation hardware.
• High-speed pipelined 8051 core architecture executing 70% of instructions in one or two system clocks for efficient processing.
• Comprehensive analog peripherals including a 10-bit ADC, programmable comparator, and built-in temperature sensor.

Applications

• Capacitive touch interface designs
• Embedded systems requiring mixed-signal processing
• Low-voltage portable electronic devices

Procurement Notes

Verify component authenticity through authorized channels as this part is marked Not Recommended for New Designs. Confirm RoHS compliance status via official documentation before integration. Ensure supply chain stability due to potential end-of-life constraints. Validate pinout compatibility with existing PCB layouts using the provided datasheet specifications.

Selection Notes

Select this MCU for applications needing integrated capacitive sensing alongside standard 8051 functionality. Consider the 25 MHz performance limit and 1.8 V to 3.6 V operating range against system requirements. Evaluate the QSOP-24 package dimensions for mechanical fit. Review the specific peripheral allocation compared to other members of the C8051F8xx family.

Part Context

This component belongs to the C8051F80x-83x family of mixed-signal ISP Flash MCUs by Silicon Labs. These devices combine high-performance analog peripherals with a fast 8051 core. The family targets cost-sensitive applications requiring on-chip debug and extensive connectivity options within a small form factor.

Replacement Considerations

Consult the C8051F8xx product selection guide for alternative pin-compatible or functionally similar devices within the same manufacturer's portfolio. Verify memory sizes and peripheral availability when migrating to newer generations.

FAQ

Does the C8051F814-GU support capacitive touch sensing?

Yes, it includes an integrated Capacitance to Digital Converter (CS0) that supports buttons, sliders, wheels, and capacitive proximity sensing.

What is the maximum clock frequency for this microcontroller?

The device supports a maximum clock frequency of 25 MHz, delivering up to 25 MIPS throughput.