C8051F38A-B-GQ

Overview

The C8051F38A-B-GQ is an 8-bit microcontroller from the Silicon Labs C8051F38x family, featuring a high-speed CIP-51 core operating at up to 48 MIPS. It integrates 32 kB of in-system programmable Flash memory and 2.25 kB of RAM. The device includes a 10-bit ADC with up to 500 ksps conversion rate, two comparators, and a built-in temperature sensor. Digital peripherals consist of hardware-enhanced SPI, dual I2C/SMBus interfaces, and dual UARTs. It offers 40 port I/O pins, all 5 V tolerant, and supports operation within a voltage range of 2.7 V to 5.25 V across a 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 analog subsystem with 10-bit ADC, dual comparators, and internal reference
• Comprehensive digital communication interfaces including SPI, dual I2C, and dual UARTs
• Non-invasive on-chip debug capability supporting breakpoints and single stepping

Applications

• Industrial control systems requiring robust I/O and analog processing
• Data acquisition applications utilizing the high-speed ADC and multiplexer
• Embedded devices needing reliable serial communication via UART and SMBus
• Portable instrumentation benefiting from low-voltage operation and integrated regulators

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity upon receipt, as surface-mount components are sensitive to physical damage. Ensure storage conditions comply with moisture sensitivity levels specified in the datasheet. Cross-reference part numbers carefully to distinguish between variants with different memory sizes or packages within the same family.

Selection Notes

Select this component when a fully integrated mixed-signal MCU is required for cost-sensitive designs. The C8051F38A provides sufficient Flash and RAM for moderate firmware complexity while offering extensive peripheral integration. Consider the 48-pin TQFP package for ease of prototyping and PCB layout. Evaluate power consumption requirements against the available sleep modes if battery operation is critical.

Part Context

This microcontroller belongs to the C8051F38x series, which represents a line of fully integrated mixed-signal system-on-chip solutions. These devices combine a fast 8051-compatible processor with rich analog and digital peripherals, reducing the need for external components. The series is designed for applications demanding high performance and low power consumption in a compact form factor.

Replacement Considerations

Check for C8051F389-B-GQ or C8051F388-B-GQ equivalents within the same family, noting differences in Flash capacity (64 kB vs 32 kB) and package type (LQFP/QFN vs TQFP). Verify pin compatibility and peripheral availability before substitution.