C8051F920-G-GM

Overview

The C8051F920-G-GM is an 8-bit microcontroller from the Silicon Labs C8051F9xx series, featuring a high-speed CIP-51 core with up to 25 MIPS throughput at a 25 MHz clock. 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 ADC with 300 ksps throughput, two comparators, hardware SMBus, dual SPI, and UART interfaces. It is housed in a 32-pin QFN (5x5 mm) package.

Feature Summary

• Integrated on-chip debug circuitry facilitates full-speed, non-intrusive in-system debugging without requiring external emulators.
• Built-in DC-DC converter enables efficient single-cell battery operation by stepping up low input voltages to stable internal levels.
• Hardware SmaRTClock provides real-time clock functionality with ultra-low power consumption suitable for continuous timekeeping.
• High-speed 8051 core executes approximately 70% of instructions in one or two system clocks for improved processing efficiency.

Applications

• Single-cell battery-powered embedded systems
• Dual-cell battery-operated devices
• Low-power industrial control applications
• Portable consumer electronics

Procurement Notes

Verify the specific suffix GMR against the datasheet ordering information to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status and check for any product change notices regarding assembly or material updates. Ensure the selected variant matches the required pinout and thermal characteristics for the target PCB design.

Selection Notes

Select this component when a low-voltage 8-bit MCU with integrated analog peripherals is required. The C8051F920 variant specifically offers 32 kB of Flash, distinguishing it from the 64 kB F930 model. Consider the 32-pin QFN package dimensions and the availability of on-chip debug features for development efficiency. Evaluate the 0.9 V to 3.6 V operating range against the system's power budget.

Part Context

This part belongs to the C8051F9xx family of mixed-signal microcontrollers designed for low-voltage applications. The series emphasizes energy efficiency through features like the SmaRTClock and configurable power modes. The C8051F920 represents the mid-range memory configuration within this family, balancing code storage capacity with cost and power constraints.

Replacement Considerations

Public confirmed substitute part numbers: C8051F930-G-GMR (64 kB Flash variant).

FAQ

Does the C8051F920 support single-cell battery operation?

Yes, the device supports one-cell mode operation from 0.9 V to 1.8 V using its built-in DC-DC converter.

What is the maximum ADC throughput?

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