C8051F381-GQ

Overview

The Silicon Labs C8051F381-GQ is an 8-bit microcontroller featuring a high-speed 8051 core operating at up to 48 MIPS. It integrates 64 kB of in-system programmable Flash memory and 4.25 kB of RAM. The device includes a Full Speed USB 2.0 controller with integrated transceiver, a 10-bit ADC supporting up to 500 ksps, two comparators, and multiple digital peripherals including SPI, I2C, and UARTs. It operates on a voltage supply of 2.7 V to 5.25 V within a temperature range of –40 °C to +85 °C.

Feature Summary

• Integrates a high-speed pipelined 8051 core capable of up to 48 MIPS execution.
• Includes a USB 2.0 compliant full-speed controller with integrated transceiver and clock recovery.
• Features a 10-bit analog-to-digital converter with built-in multiplexer and internal reference options.
• Provides extensive digital connectivity via hardware-enhanced SPI, dual I2C/SMBus, and dual UART interfaces.

Applications

• USB-enabled data acquisition systems
• Industrial sensor interface modules
• Motor control applications requiring precise timing
• Portable battery-powered devices

Procurement Notes

Verify the specific package variant, as the GQ suffix denotes a 32-pin LQFP package. Confirm that the design accommodates the 2.7 V to 5.25 V supply range requirements. Ensure compatibility with the C2 debug interface for programming and debugging. Check for any end-of-life notices or last-time-buy notifications associated with this component family before finalizing procurement plans.

Selection Notes

Select this component when a robust 8051 architecture is required alongside native USB connectivity without external transceivers. It is suitable for designs needing high-resolution analog input processing combined with standard serial communication protocols. Consider the 32-pin LQFP package constraints for PCB layout. Evaluate power consumption profiles against the available low-power modes if battery operation is critical.

Part Context

This part belongs to the C8051F38x family of highly integrated mixed-signal microcontrollers. The family shares a common peripheral set but varies in memory size and package options. The C8051F381 specifically offers 64 kB Flash and utilizes the 32-pin LQFP form factor. It is designed for applications demanding both digital control and analog signal conditioning capabilities.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.