C8051F385-GQ

Overview

The C8051F385-GQ is a mixed-signal System-on-Chip microcontroller from Silicon Labs, featuring a high-speed 48 MIPS pipelined 8051 core. It integrates 64 kB of in-system programmable Flash memory and 4352 bytes of RAM. The device includes a USB 2.0 compliant full-speed controller with an integrated transceiver and clock recovery. Digital peripherals consist of two UARTs, one SPI, and two SMBus interfaces. Analog features include two comparators and a temperature sensor. It operates on a 2.7 to 5.25 V supply within a -40 to +85 °C temperature range.

Feature Summary

• Integrated USB 2.0 full-speed controller with built-in transceiver and clock recovery eliminates external components.
• High-performance 8051 core executes instructions in 1 or 2 system clocks for efficient processing.
• In-system programmable Flash allows field upgrades and non-volatile data storage without external programmers.
• On-chip debug circuitry supports non-intrusive in-system debugging with breakpoints and register inspection.

Applications

• PC peripherals requiring USB connectivity
• Point-of-sale terminals
• Embedded modems
• Voice over Internet Protocol telephones

Procurement Notes

Verify the specific package type against the datasheet, as the C8051F38x family utilizes multiple packages including LQFP-32, QFN-32, and TQFP-48. Confirm that the selected variant matches the required pinout and thermal characteristics for your design. Ensure compatibility with existing firmware architectures due to potential hardware incompatibilities with older C8051F34x devices.

Selection Notes

Select this component when a fully integrated USB solution is required without external transceivers. The 48 MIPS performance suits applications needing rapid data processing alongside analog monitoring via comparators. Consider the 64 kB Flash capacity for complex firmware requirements. Verify voltage regulator needs based on the 2.7 to 5.25 V operating range.

Part Context

This part belongs to the C8051F38x Full Speed Flash MCU family by Silicon Labs. The family provides mixed-signal SoC capabilities combining digital control with analog peripherals. The C8051F385 variant specifically offers 64 kB Flash and 4352 bytes RAM, distinguishing it from lower-capacity models like the F383 or higher-end options.

Replacement Considerations

Check for hardware incompatibilities with the C8051F34x family before substitution. Review pinout differences between LQFP-32 and other package options if replacing variants within the same series. Ensure USB clock configuration requirements are met by the internal oscillator accuracy.