C8051F38B-GM

Overview

The C8051F38B-GM is a mixed-signal System-on-Chip microcontroller from Silicon Labs, featuring a high-speed 8051 core operating at up to 48 MIPS. It integrates 32 kB of Flash memory and 2.25 kB of RAM within a compact 32-pin QFN package. The device includes a 10-bit ADC with up to 500 ksps sampling rate, two comparators, and multiple digital communication interfaces including SPI, I2C, and UARTs. It supports a supply voltage range of 2.7 V to 5.25 V and operates across an industrial temperature range of -40 °C to +85 °C.

Feature Summary

• High-performance pipelined 8051 core executing most instructions in one or two system clocks
• Integrated 10-bit analog-to-digital converter with built-in multiplexer and temperature sensor
• On-chip debug circuitry enabling full-speed non-intrusive in-system debugging without external emulators
• Flexible port I/O configuration with programmable digital crossbar for peripheral pin assignment

Applications

• Industrial control systems requiring mixed-signal processing
• Sensor interface modules utilizing the integrated ADC and comparators
• Portable instrumentation benefiting from low power and high integration
• Motor control applications leveraging the Programmable Counter Array

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required package type and temperature rating. Check current lifecycle status as this family may be subject to discontinuation notices. Ensure compatibility with existing PCB footprints and design rules before finalizing procurement orders.

Selection Notes

Select this model when a compact 32-pin solution is required alongside substantial Flash capacity. Consider the C8051F389 variant if a TQFP package is preferred over QFN. Evaluate the C8051F38A if reduced memory sizes better suit the application constraints. Verify that the 48 MHz clock speed meets the real-time processing requirements of the target system design.

Part Context

This component belongs to the C8051F38x series of fully integrated mixed-signal microcontrollers. It shares architectural similarities with the C8051F34x family but offers distinct memory configurations and package options. The series emphasizes high integration by combining digital peripherals with precision analog functions on a single silicon die.

Replacement Considerations

Public confirmed substitute part numbers: C8051F389-B-GM, C8051F38A-B-GM.