C8051F800-GM

Overview

The C8051F800-GM is an obsolete 8-bit mixed-signal microcontroller from Silicon Labs, part of the C8051F80x-83x family. It features a high-speed 8051 core operating at up to 25 MHz with pipelined architecture. The device integrates 16 kB of Flash memory and 512 bytes of internal data RAM. Key peripherals include a 10-bit ADC with up to 500 ksps conversion rate, a capacitance-to-digital converter supporting capacitive sensing, and multiple digital interfaces such as UART, SMBus, and SPI. It operates within a supply voltage range of 1.8 V to 3.6 V and supports temperatures from -40 °C to +85 °C in a QFN-20 package.

Feature Summary

• Integrates a capacitance-to-digital converter for buttons, sliders, wheels, and proximity sensing with auto-scan capabilities.
• Features a high-speed 8051 core with pipelined instruction architecture executing most instructions in one or two system clocks.
• Includes a 10-bit analog-to-digital converter with up to 500 ksps throughput and built-in temperature sensor.
• Provides on-chip debug circuitry for full-speed, non-intrusive in-system debugging without external emulators.

Applications

• Capacitive touch interface designs requiring button, slider, or wheel detection.
• Battery-powered systems utilizing low-voltage operation and power management modes.
• Industrial control applications requiring robust analog signal acquisition via the integrated ADC.
• Embedded systems needing reliable serial communication through hardware-enhanced UART and SMBus.

Procurement Notes

Verify component obsolescence status before procurement, as this model is marked as Not Recommended for New Designs and End-of-Life. Confirm availability through authorized distributors or secondary markets. Ensure replacement strategies are evaluated due to potential supply constraints. Validate that the specific QFN-20 package variant matches your PCB footprint requirements. Check for any recent product change notices affecting manufacturing sites or materials.

Selection Notes

Select this component only if existing designs already utilize the C8051F80x family architecture. Evaluate alternative modern microcontrollers if starting a new design due to the obsolete status. Consider the integration of capacitive sensing and analog peripherals when assessing functional requirements. Verify compatibility with existing development tools and debug interfaces like the C2 interface. Assess long-term support availability given the discontinuation notice.

Part Context

The C8051F800-GM belongs to the C8051F80x-83x series of mixed-signal ISP Flash MCUs by Silicon Labs. This family emphasizes high integration with analog and digital peripherals on a single chip. The C8051F800 specifically offers 16 kB Flash and 512 bytes RAM. It shares common architectural features with siblings like the C8051F801 and C8051F802, differing primarily in memory size and pinout configurations.

Replacement Considerations

Public confirmed substitute part numbers: PIC32MM0016GPL020-I/ML (Microchip Technology).

FAQ

What is the maximum clock frequency of the C8051F800-GM?

The C8051F800-GM supports a maximum system clock frequency of 25 MHz.

Does the C8051F800-GM support capacitive sensing?

Yes, it includes a dedicated capacitance-to-digital converter that supports buttons, sliders, wheels, and capacitive proximity sensing.

What is the operating voltage range for this MCU?

The device operates within a supply voltage range of 1.8 V to 3.6 V.