C8051F38C-GQ

Overview

The C8051F38C-GQ is a mixed-signal System-on-Chip microcontroller from Silicon Labs, featuring an 8051-compatible core operating at up to 48 MHz. It integrates 16 kB of in-system programmable Flash memory and 2.3 kB of RAM within a 32-pin LQFP package. The device includes a full-speed USB 2.0 controller with integrated transceiver, a 10-bit ADC supporting up to 500 ksps with 21 channels, two analog comparators, and multiple digital communication interfaces including SPI, I2C, and UART.

Feature Summary

• Integrates a high-speed pipelined 8051 core capable of executing instructions in one or two system clocks for efficient processing.
• Includes a full-speed USB 2.0 function controller with built-in clock recovery and transceiver, eliminating the need for external components.
• Features a versatile analog subsystem with a 10-bit ADC, dual comparators, internal voltage reference, and temperature sensor.
• Provides flexible peripheral configuration through a programmable digital crossbar and supports non-intrusive on-chip debugging via the C2 interface.

Applications

• USB-enabled data acquisition systems
• Industrial sensor interfaces and monitoring
• Motor control applications
• Portable instrumentation

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and temperature range. Confirm that the component meets AEC-Q100 automotive qualification requirements if intended for automotive use. Ensure compatibility with existing design tools and development kits provided by the manufacturer.

Selection Notes

Select this model when a compact 32-pin form factor is required alongside integrated USB connectivity and moderate Flash capacity. Evaluate the trade-off between the 16 kB program memory and the available RAM against application complexity. Consider the pin count limitations for peripheral availability compared to larger packages in the same family.

Part Context

This component belongs to the C8051F38x family of mixed-signal microcontrollers designed for high integration. The series shares a common architecture but varies in memory size and package options. The C8051F38C variant specifically targets applications requiring a balance of processing power, analog capabilities, and USB functionality in a small footprint.

Replacement Considerations

Consult official substitution lists for direct replacements. Verify electrical characteristics and pinout compatibility before transitioning to alternative part numbers within the same product line.

FAQ

Does the C8051F38C-GQ require an external crystal for USB operation?

No, the device features an integrated clock recovery mechanism that allows full-speed USB operation without an external crystal.

What is the maximum sampling rate of the ADC on this MCU?

The integrated 10-bit Analog-to-Digital Converter supports sampling rates of up to 500 ksps.