C8051F389-B-GM

Overview

The C8051F389-B-GM is an 8-bit mixed-signal microcontroller from Silicon Labs, part of the C8051F38x family. It features a high-speed 8051 core with up to 48 MIPS throughput and pipelined architecture. The device integrates 64 kB of in-system programmable Flash memory and 4352 bytes of RAM. Key peripherals include a 10-bit ADC with up to 500 ksps sampling rate, two comparators, and multiple digital interfaces such as SPI, I2C/SMBus, and UARTs. It operates on a voltage supply of 2.7 to 5.25 V using on-chip regulators and supports a temperature range of –40 to +85 °C.

Feature Summary

• High-performance 8051 core executing up to 48 MIPS with pipelined instruction architecture
• Integrated 10-bit analog-to-digital converter supporting up to 500 ksps with built-in multiplexer
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators
• Flexible power management with on-chip voltage regulators supporting 2.7 V to 5.25 V operation

Applications

• Industrial control systems requiring mixed-signal processing
• Data acquisition systems utilizing high-speed ADC capabilities
• Portable instruments benefiting from low-power modes and integrated regulators
• Embedded applications needing robust in-system debugging and flash reprogramming

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package type matches design requirements, as variants exist for LQFP and QFN. Check for end-of-life status, as this model may be marked Not Recommended for New Designs. Ensure environmental compliance documentation aligns with project specifications before finalizing procurement decisions.

Selection Notes

Select this MCU when a high-speed 8051 solution with significant onboard Flash and RAM is required. Consider the C8051F389-B-GM for designs needing precise analog conversion via its 10-bit ADC and flexible peripheral mapping. Evaluate thermal performance within the specified operating range. Compare against newer generations if long-term availability is critical, given its current lifecycle status.

Part Context

This component belongs to the C8051F38x series of fully integrated mixed-signal system-on-a-chip microcontrollers. It shares architectural similarities with the C8051F34x family but offers enhanced performance and additional peripherals. The device is designed for applications demanding high integration, reducing board space and component count while maintaining compatibility with standard 8051 development tools and ecosystems.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult official Silicon Labs resources for recommended upgrades or legacy replacements.