C8051F835-GSR

Overview

The C8051F835-GSR is a mixed-signal ISP Flash microcontroller from the C8051F80x-83x family. It features a high-speed 8051 core with up to 25 MIPS throughput at a 25 MHz clock. The device includes up to 16 kB of in-system programmable Flash and 512 bytes of internal data RAM. Integrated peripherals include a 10-bit ADC supporting up to 500 ksps, a Capacitance to Digital Converter with 16-bit resolution, comparators, and standard digital interfaces such as UART, SMBus, and SPI. It operates on a supply voltage of 1.8 to 3.6 V within a temperature range of –40 to +85 °C.

Feature Summary

• Integrated Capacitance to Digital Converter supports buttons, sliders, wheels, and capacitive proximity sensing with auto-scan capabilities.
• High-speed pipelined 8051 core executes 70% of instructions in one or two system clocks for efficient processing.
• On-chip debug circuitry facilitates full-speed, non-intrusive in-system debugging without requiring external emulators.
• In-system programmable Flash memory allows for field upgrades and non-volatile data storage in 512-byte sectors.

Applications

• Capacitive touch interface designs utilizing the integrated capacitance sensing capabilities.
• Mixed-signal control systems requiring analog-to-digital conversion and comparator functions.
• Embedded applications needing in-system programming and firmware updates via Flash memory.
• Low-power portable devices operating within the specified voltage and temperature ranges.

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors or certified suppliers. Confirm the specific suffix matches the required package type and temperature grade. Check for current availability status as this series may be subject to discontinuation notices. Ensure compliance with RoHS directives and relevant environmental standards before integration into final products.

Selection Notes

Select this model when a complete mixed-signal solution is required within a constrained pin count. The inclusion of both a high-speed ADC and a dedicated capacitance sensor reduces external component count. Evaluate the 16 kB Flash capacity against application code size requirements. Consider the 1.8 V to 3.6 V supply range compatibility with existing power rails in the target design.

Part Context

This component belongs to the C8051F80x-83x family of fully integrated mixed-signal System-on-a-Chip solutions. These devices are designed to replace discrete logic and analog components by integrating the CPU, memory, and extensive peripheral sets onto a single die. The family emphasizes ease of development through on-chip debug and in-system programming capabilities.

Replacement Considerations

Consult official Silicon Labs documentation for end-of-life notifications regarding the C8051F80x-83x series. Identify compatible successors within the C8051F or EFM8 families that maintain pin-out and peripheral compatibility. Verify that alternative parts support the required capacitance sensing and ADC specifications if those features are critical to the application.