C8051F38B-B-GQ

Overview

The C8051F38B-B-GQ is an 8-bit microcontroller from the Silicon Labs C8051F38x family, featuring a high-speed 8051 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 an internal voltage reference. Digital peripherals consist of hardware-enhanced SPI, two I2C/SMBus interfaces, and two enhanced UARTs. It offers 25 port I/O pins, all 5 V tolerant, and supports power supply voltages from 2.7 V to 5.25 V within an operating temperature range of –40 °C to +85 °C.

Feature Summary

• Integrated on-chip debug circuitry for full-speed, non-intrusive in-system debugging without external emulators.
• Pipelined instruction architecture executes 70% of instructions in one or two system clocks for high processing speed.
• Supports multiple clock sources including internal oscillators with ±1.5% accuracy and external crystal or RC options.
• Features a built-in analog multiplexer supporting both single-ended and differential modes for flexible signal acquisition.

Applications

• Industrial control systems requiring precise analog signal monitoring
• Embedded sensor nodes utilizing integrated temperature sensing capabilities
• Communication gateways leveraging dual UART and SMBus connectivity

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity upon receipt, as surface-mount devices are sensitive to physical damage. Ensure storage conditions comply with moisture sensitivity level requirements to prevent soldering defects during assembly processes.

Selection Notes

Select this variant for designs prioritizing mixed-signal integration within a compact footprint. Evaluate pin count constraints against the 25 available I/O lines. Consider the 32 kB Flash limit for complex firmware requirements. Verify voltage regulator compatibility if operating near the lower 2.7 V boundary.

Part Context

This component belongs to the C8051F38x series, which combines traditional 8051 architecture with modern mixed-signal capabilities. The B suffix typically denotes specific memory configurations within the family. These MCUs are designed for applications demanding high performance and low power consumption in embedded environments.

Replacement Considerations

Consult official documentation for cross-referencing. No public confirmed substitute part numbers are identified in the provided source material.