C8051F814-GM

Overview

The C8051F814-GM is a mixed-signal ISP Flash microcontroller from the Silicon Labs C8051F80x-83x family. It features an 8051 core with up to 25 MHz clock speed and 25 MIPS throughput. The device includes 8 kB of in-system programmable Flash memory, 512 bytes of internal data RAM, and a capacitance-to-digital converter supporting capacitive touch sensing. Analog peripherals consist of a 10-bit ADC with up to 16 channels and a comparator. Digital interfaces include UART, SMBus (I2C compatible), and SPI. It operates on a supply voltage of 1.8 V to 3.6 V and is available in a 24-pin QSOP package.

Feature Summary

• Integrated capacitance-to-digital converter for buttons, sliders, wheels, and proximity sensing with auto-scan capabilities
• High-speed pipelined 8051 core executing most instructions in one or two system clocks
• On-chip debug circuitry enabling full-speed non-intrusive in-system debugging without external emulators
• Programmable digital crossbar allowing flexible assignment of peripheral functions to port I/O pins

Applications

• Capacitive touch interface designs requiring button or slider input
• Low-voltage embedded systems operating between 1.8 V and 3.6 V
• Applications utilizing in-system programming for field upgrades
• Mixed-signal control systems integrating analog sensing with digital processing

Procurement Notes

Verify component status as this series is marked Not Recommended for New Designs. Confirm package type matches design requirements, specifically the 24-pin QSOP variant for this suffix. Check RoHS compliance details via official documentation before integration. Ensure development tools support the CIP-51 architecture for legacy maintenance projects.

Selection Notes

Select this component when existing designs utilize the C8051F8xx family and require capacitive touch functionality alongside standard mixed-signal processing. The 24-pin QSOP package suits applications needing through-hole or specific surface-mount footprints. Evaluate memory constraints against the 8 kB Flash limit. Consider power management modes if battery operation is required within the specified voltage range.

Part Context

This part belongs to the C8051F80x-83x mixed-signal MCU family, which shares common architectural features including the CIP-51 core and integrated analog peripherals. The family offers varying memory sizes and pin counts across different packages. The C8051F814-GM specifically provides 8 kB Flash and 17 I/O ports in a 24-pin configuration, distinguishing it from higher-memory variants like the F818 or lower-pin options.

Replacement Considerations

Consult the manufacturer's product selection guide for direct pin-compatible alternatives within the same family. Verify that any substitute maintains the 24-pin QSOP footprint and sufficient memory capacity. Cross-reference electrical characteristics to ensure compatibility with existing voltage levels and temperature ranges.