C8051F920-G-GQR

Overview

The C8051F920-G-GQR is an 8-bit microcontroller from the Silicon Labs C8051F9xx series, featuring a high-speed CIP-51 core operating at up to 25 MHz. It integrates 32 kB of in-system programmable Flash memory and 4352 bytes of internal data RAM. The device supports a supply voltage range of 0.9 V to 3.6 V, utilizing a built-in DC-DC converter for one-cell mode operation. Key peripherals include a 10-bit SAR ADC with 23 external inputs, two comparators, and a SmaRTClock real-time clock. Communication interfaces consist of hardware SMBus, dual SPI ports, and UARTs. It is housed in a 32-pin LQFP package.

Feature Summary

• Operates on a single-cell battery supply (0.9–1.8 V) using an integrated DC-DC converter or dual-cell mode (1.8–3.6 V).
• Includes a 10-bit SAR ADC with programmable throughput, auto-averaging accumulator, and capacitive touch sense capability.
• Features a pipelined CIP-51 core delivering up to 25 MIPS throughput with expanded interrupt handling.
• Provides concurrent digital communication via hardware SMBus, dual SPI, and UART serial ports.

Applications

• Single-cell or dual-cell battery-powered embedded systems
• Low-power industrial monitoring with analog signal acquisition
• Battery management units requiring precise voltage measurement
• Portable devices utilizing capacitive touch interfaces

Procurement Notes

Verify the specific suffix G-QR against the official datasheet ordering information to confirm the 32-LQFP package variant. Confirm that the F920 designation corresponds to the 32 kB Flash capacity rather than the 64 kB F930 variant. Check for End-of-Life notifications as this family may be marked not recommended for new designs.

Selection Notes

Select this component when low-voltage operation down to 0.9 V is required without external regulation. Ensure the 32 kB Flash capacity meets application code storage needs. Verify that the 24 I/O pins and available analog channels satisfy system interface requirements. Consider the 32-LQFP package dimensions for PCB layout constraints.

Part Context

This part belongs to the C8051F9xx family of mixed-signal microcontrollers designed for low-voltage applications. It shares architectural similarities with the C8051F93x but differs in program memory size. The series emphasizes energy efficiency through features like the SmaRTClock and multiple power management modes.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.