C8051F920-F-GQ

Overview

The C8051F920-F-GQ is an 8-bit microcontroller from the Silicon Labs C8051F92x series. It features a high-speed 8051 core with up to 25 MIPS throughput at a 25 MHz clock frequency. The device includes 32 kB of in-system programmable Flash memory and 4352 bytes of internal data RAM. Key peripherals include a 10-bit SAR ADC with up to 300 ksps throughput, two comparators, and a hardware SmaRTClock real-time clock. It supports operation from 0.9 V to 3.6 V via a built-in DC-DC converter or LDO regulator.

Feature Summary

• Integrated hardware SmaRTClock oscillator for low-power real-time clocking
• Built-in DC-DC converter enabling single-cell battery operation down to 0.9 V
• On-chip debug circuitry supporting full-speed non-intrusive in-system debugging
• High-speed pipelined 8051 core executing 70% of instructions in one or two system clocks

Applications

• Single-cell battery-powered embedded systems
• Dual-cell battery-operated devices requiring voltage regulation
• Low-power applications utilizing autonomous ADC burst modes
• Systems requiring precise timing via hardware SmaRTClock

Procurement Notes

Verify the specific package variant against the datasheet pinout definitions, as the F92x series supports multiple packages including 32-pin QFN and LQFP. Confirm that the ordering suffix corresponds to the required temperature range and packaging format. Ensure compatibility with the 0.9–3.6 V supply requirements when designing power circuits.

Selection Notes

Select this component when a fully static 8051 architecture is required alongside integrated analog peripherals. The inclusion of a built-in DC-DC converter makes it suitable for designs needing efficient power management from a single lithium cell. Consider the 32 kB Flash size and 4352 bytes RAM for code complexity and data storage needs.

Part Context

This part belongs to the C8051F93x-C8051F92x family, which shares architectural similarities but differs in Flash capacity. The 'F92x' designation specifically indicates 32 kB of Flash memory, whereas the 'F93x' counterpart offers 64 kB. Both share identical peripheral sets and power management features.

Replacement Considerations

C8051F930-GQ (64 kB Flash variant)

FAQ

How does the device support operation below 1.8 V?

The C8051F920-F-GQ utilizes a built-in DC-DC converter that generates a regulated output, allowing the digital core to operate while the input supply ranges from 0.9 V to 1.8 V.

What is the maximum throughput of the on-chip ADC?

The 10-bit SAR ADC supports a programmable throughput of up to 300 ksps.