C8051F389-GMR

Overview

The C8051F389-GMR is an 8-bit microcontroller from the Silicon Labs C8051F38x family, featuring a high-speed 8051 core with up to 48 MIPS throughput. It integrates 64 kB of Flash memory and 4352 bytes of RAM. The device includes a full-speed USB 2.0 function controller with 1 kB endpoint RAM, a 10-bit ADC operating at 500 ksps, two analog comparators, and a temperature sensor. It supports supply voltages from 1.8 V to 3.6 V, or 2.7 V to 5.25 V using on-chip regulators. The component operates within a temperature range of –40 °C to +85 °C.

Feature Summary

• Integrates a full-speed USB 2.0 function controller with integrated transceiver and clock recovery.
• Features a pipelined 8051 core executing up to 70% of instructions in one or two system clocks.
• Includes a 10-bit SAR ADC with built-in multiplexer and external conversion start capability.
• Provides non-intrusive on-chip debug circuitry for in-system debugging without external emulators.

Applications

• USB communication devices
• Data acquisition systems
• Portable instruments

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature rating. Confirm that the 'GMR' suffix corresponds to the correct reel packaging variant as defined by the manufacturer's current product selection guide. Ensure compatibility with existing design constraints before procurement.

Selection Notes

Select this model when 64 kB of Flash and 4352 bytes of RAM are required alongside full-speed USB connectivity. It is suitable for designs needing a 10-bit ADC and analog comparators in a compact form factor. Consider the 32-pin LQFP or QFN packages if space is limited compared to the 48-pin TQFP option.

Part Context

This component belongs to the C8051F38x family of mixed-signal microcontrollers designed for applications requiring USB connectivity and broad peripheral integration. The family shares a common architecture but varies in memory size and specific peripheral availability across different part numbers.

Replacement Considerations

The C8051F389-GQ (LQFP32) and C8051F389-GM (QFN32) are direct pin-compatible alternatives within the same series offering identical electrical specifications and functionality in different package styles.