C8051F986-GM

Overview

The C8051F986-GM is an 8-bit microcontroller from Silicon Labs, utilizing the CIP-51 8051 core architecture. It features 8 kB of in-system programmable Flash memory and 512 bytes of RAM. The device operates at a maximum clock frequency of 25 MHz with a supply voltage range of 1.8 V to 3.6 V. Key peripherals include one 12-bit ADC with 10 channels, two PWM units, one SPI interface, and one UART. It is housed in a 24-pin QFN (4x4 mm) package and supports operation between -40°C and +85°C.

Feature Summary

• Integrates a high-speed 12-bit analog-to-digital converter with multiple input channels for precision signal acquisition.
• Includes flexible pulse-width modulation generators supporting various bit depths for motor control and power regulation.
• Provides standard serial communication interfaces including SPI and UART for system connectivity.

Applications

• Battery-powered sensor nodes requiring low voltage operation
• Industrial control systems utilizing PWM actuation
• Data acquisition modules employing multi-channel analog sensing

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and temperature grade. Confirm current production status as some variants may be obsolete. Ensure compatibility with existing PCB footprints for the 24-QFN form factor. Check for any errata updates relevant to silicon revisions before finalizing design implementation.

Selection Notes

Select this component when a balance of moderate Flash capacity and high-resolution analog conversion is required within a compact footprint. The 1.8 V to 3.6 V operating range suits single-cell battery applications. Compare pin counts and peripheral sets against higher-end models if additional communication interfaces or larger memory are needed.

Part Context

This part belongs to the C8051F9xx series of mixed-signal microcontrollers. These devices integrate standard 8051 functionality with extensive on-chip peripherals, reducing external component count. The series targets cost-sensitive embedded applications needing integrated analog capabilities without complex external circuitry.

Replacement Considerations

Officially documented substitutes include the C8051F986-GUR, which offers identical electrical specifications but utilizes a 24-QSOP package instead of QFN. Verify mechanical fitment constraints before substituting package types.