C8051F803-GS

Overview

The C8051F803-GS is a mixed-signal ISP Flash MCU from Silicon Labs, featuring a high-speed 8051 μC core with up to 25 MIPS throughput at a 25 MHz clock. It integrates up to 16 kB of in-system programmable Flash and 512 bytes of internal data RAM. Key peripherals include a 10-bit ADC supporting up to 500 ksps, a capacitive sense module with 16-bit resolution, comparators, and digital interfaces such as UART, SMBus, and SPI. The device operates on a supply voltage of 1.8 to 3.6 V and supports packages including 24-pin QSOP, 20-pin QFN, and 16-pin SOIC.

Feature Summary

• Integrated capacitive sense controller supporting buttons, sliders, wheels, and proximity sensing with auto-scan capabilities
• High-speed pipelined 8051 core executing most instructions in one or two system clocks for efficient processing
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators
• Flexible clock sources including an internal 24.5 MHz oscillator that supports crystal-less UART operation

Applications

• Capacitive touch interface implementations
• Low-power embedded control systems
• Data acquisition applications requiring analog-to-digital conversion
• Industrial monitoring devices operating within extended temperature ranges

Procurement Notes

Verify the component status before procurement, as the datasheet explicitly marks this family as Not Recommended for New Designs. Confirm package availability matches the required form factor, such as 16-pin SOIC or 20-pin QFN. Ensure design constraints align with the specified 1.8 to 3.6 V supply range and industrial temperature limits of -40 to +85 °C.

Selection Notes

Select this MCU for designs prioritizing mixed-signal integration and capacitive sensing over USB connectivity. Evaluate memory requirements against the 16 kB Flash and 512 byte RAM limits. Consider the 10-bit ADC resolution and sampling rate for signal accuracy needs. Review pinout compatibility if migrating from legacy 8051 architectures.

Part Context

This part belongs to the C8051F80x-83x family of mixed-signal microcontrollers. These devices are designed for cost-sensitive applications requiring high performance and analog integration. The family shares a common architecture but varies in memory size and peripheral configurations. They utilize the CIP-51 core for enhanced instruction execution speed compared to standard 8051 processors.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the 'Not Recommended for New Designs' status, alternative silicon should be evaluated for new projects.