C8051F700-GQ

Overview

The C8051F700-GQ is a mixed-signal ISP Flash microcontroller from Silicon Labs, featuring a high-speed 8051 core with up to 25 MIPS throughput at 25 MHz. It integrates 16 kB of in-system programmable Flash memory and 512 bytes of internal data RAM. The device includes a capacitance-to-digital converter supporting up to 38 input channels for touch sensing, alongside a 10-bit ADC operating at up to 500 ksps. Additional peripherals include analog comparators, four 16-bit timers, a PCA with PWM functionality, and standard serial interfaces like UART, SMBus, and SPI.

Feature Summary

• Capacitance-to-Digital Converter supports buttons, sliders, wheels, capacitive proximity, and touch screen sensing with auto-scan capabilities
• High-Speed 8051 µC Core executes 70% of instructions in 1 or 2 system clocks for efficient processing
• On-Chip Debug circuitry facilitates full speed, non-intrusive in-system debug without requiring external emulators
• Integrated Capacitive Sense features allow wake-on-touch and automatic sample accumulation for robust sensing

Applications

• Capacitive touch sensing applications including buttons, sliders, and proximity detection
• Industrial control systems requiring mixed-signal processing and real-time monitoring
• Portable instruments utilizing the built-in temperature sensor and low power management modes
• Motor control implementations leveraging the Programmable Counter Array for PWM generation

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity upon receipt, as the TQFP-64 form factor requires careful handling during inspection. Ensure that the specific revision matches project requirements, noting that this family is marked as not recommended for new designs. Cross-reference ordering information against official datasheets to validate pinout compatibility before integration into final assemblies.

Selection Notes

Select this component when existing designs utilize the C8051F70x family and require maintenance or replacement. Evaluate the trade-off between the integrated capacitance sensing capabilities and the limited Flash size compared to newer generations. Consider the availability of development tools and legacy support structures if migrating from older silicon versions. Assess whether the 25 MHz performance ceiling meets the timing constraints of the target application logic.

Part Context

This part belongs to the C8051F70x/71x Mixed Signal ISP Flash MCU Family produced by Silicon Laboratories. It represents a mature line of highly integrated microcontrollers designed for cost-sensitive embedded applications. The series combines digital processing with extensive analog peripherals on a single chip, reducing bill-of-materials complexity. While superseded by newer architectures, it remains prevalent in established industrial and consumer electronics products.

Replacement Considerations

Public confirmed substitute part numbers: None identified.