C8051F805-GS

Overview

The C8051F805-GS is an 8-bit mixed-signal ISP Flash microcontroller from the Silicon Labs C8051F80x-83x family. It features a high-speed 8051 core with up to 25 MIPS throughput at a 25 MHz clock speed. The device includes up to 16 kB of in-system programmable Flash memory and 512 bytes of internal data RAM. Key peripherals include a 10-bit ADC, capacitive sense module, comparators, UART, SMBus, SPI, timers, and a Programmable Counter Array. It operates on a supply voltage of 1.8 V to 3.6 V within a temperature range of –40 °C to +85 °C.

Feature Summary

• Integrated capacitance-to-digital converter supporting buttons, sliders, wheels, and proximity sensing with fast conversion times.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Pipelined instruction architecture executing 70% of instructions in one or two system clocks for high performance.
• Flexible clock sources including a 24.5 MHz ±2% oscillator and support for external crystals, RC, or clock inputs.

Applications

• Capacitive touch interface designs
• Low-voltage embedded control systems
• Data acquisition applications requiring analog signal processing

Procurement Notes

Verify component authenticity through authorized distributors. Confirm package type matches design requirements as the device is available in multiple form factors. Check current status as this family may be marked Not Recommended for New Designs. Ensure development tools are compatible with the C2 interface for programming and debugging.

Selection Notes

Select this MCU for applications requiring mixed-signal capabilities within a compact footprint. Consider the specific pin count and peripheral set required for the target application. Evaluate power consumption needs against the available low-power modes. Verify that the 1.8 V to 3.6 V supply range aligns with the system power architecture.

Part Context

This component belongs to the C8051F80x-83x series of mixed-signal microcontrollers. The family offers varying amounts of Flash memory and I/O configurations across different part numbers. All members share the same core architecture and peripheral sets, differing primarily in memory size and pin availability.

Replacement Considerations

Consult the official product selection guide for direct substitutes within the C8051F80x-83x family. Verify compatibility if migrating between variants with different memory sizes or pin counts.

FAQ

What is the maximum throughput of the CPU core?

The pipelined 8051 core delivers up to 25 MIPS throughput when operating at a 25 MHz clock frequency.

Does the device support in-system programming?

Yes, the Flash memory is in-system programmable (ISP) in 512-byte sectors, allowing for field updates without removing the chip.