C8051F966-A-GMR

Overview

The C8051F966-A-GMR is an 8-bit microcontroller from the Silicon Labs C8051F9xx series, featuring a CIP-51 core operating at up to 25 MHz. It integrates 64 KB of in-system programmable Flash memory and 4.25 KB of RAM. The device includes 23 channels of 10-bit analog-to-digital conversion and supports multiple digital interfaces including SMBus, SPI, and UART/USART. Powered by a supply voltage ranging from 0.9 V to 3.6 V, it operates within a temperature range of -40°C to 85°C. The component is housed in a compact 32-QFN (5x5) package with exposed pad for surface mount installation.

Feature Summary

• Integrates a high-performance CIP-51 8051-compatible core with pipelined architecture for efficient instruction execution.
• Provides extensive mixed-signal capabilities through a large array of 10-bit ADC channels and integrated peripherals.
• Features flexible digital I/O mapping via a software-configurable crossbar decoder for versatile pin assignment.
• Supports low-power operation with internal oscillator options and comprehensive power management features.

Applications

• Battery-powered sensor nodes requiring low voltage operation
• Industrial control systems utilizing multiple analog inputs
• Consumer electronics with limited board space constraints
• Data acquisition systems needing high channel count ADCs

Procurement Notes

Verify the complete part number including suffixes against official Silicon Labs documentation to ensure correct package and temperature grade. Confirm RoHS compliance status and moisture sensitivity level requirements prior to procurement. Check for any active product change notices or lifecycle status updates that may affect long-term availability. Ensure ordering quantities align with standard reel packaging specifications provided by the manufacturer.

Selection Notes

Select this component when a balance of moderate program memory and high analog input channel count is required. The wide supply voltage range makes it suitable for direct battery interfacing without additional regulation. Consider the 32-pin QFN footprint for PCB layout density. Evaluate if the 25 MHz speed meets real-time processing needs compared to higher-frequency alternatives in the same family.

Part Context

This device belongs to the C8051F9xx family of mixed-signal system-on-chip microcontrollers. It shares architectural similarities with other members like the C8051F930 but offers increased Flash capacity and specific peripheral configurations. The CIP-51 core ensures compatibility with existing 8051 toolchains while providing enhanced performance over traditional architectures.

Replacement Considerations

Direct substitutes within the same family include the C8051F930-G-GMR, which shares the 32-QFN package and similar interface set but differs in memory size. Verify pin compatibility and software register mappings before swapping. Other C8051F9xx variants may require firmware adjustments due to differing peripheral counts or memory sizes.