C8051F981-C-GM

Overview

The C8051F981-C-GM is an 8-bit microcontroller from Silicon Labs, utilizing the CIP-51 8051 core architecture. It features 8 kB of Flash program memory and 512 B of RAM. The device operates at a maximum clock frequency of 25 MHz within a supply voltage range of 1.8 V to 3.6 V. It is housed in a QFN-20 package with 16 I/O lines. Key peripherals include four timers, Enhanced SPI, Enhanced UART, I2C, and SMBus interfaces. The component supports surface mount installation and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates CIP-51 8051 core for high-performance instruction execution
• Includes multiple serial communication interfaces such as SPI, UART, I2C, and SMBus
• Features on-chip Flash memory for non-volatile program storage
• Supports low-voltage operation suitable for portable applications

Applications

• Industrial control systems requiring robust 8-bit processing
• Consumer electronics devices with limited power budgets
• Embedded sensor nodes utilizing serial communication protocols
• General-purpose microcontroller applications in compact form factors

Procurement Notes

Verify current availability status as this component may be discontinued or not recommended for new designs. Confirm exact ordering suffixes match required packaging and temperature grades. Cross-reference datasheet revisions to ensure compatibility with existing firmware and hardware designs. Check for official product change notifications regarding manufacturing site or material updates before procurement.

Selection Notes

Select this model when a balance of moderate code capacity and low pin count is required. The QFN-20 package suits space-constrained PCB layouts. Ensure design requirements align with the 25 MHz speed limit and 1.8 V minimum supply voltage. Verify that the absence of an onboard ADC does not conflict with application signal conditioning needs.

Part Context

This part belongs to the C8051F9xx series of mixed-signal microcontrollers. It shares architectural similarities with other members like the C8051F980 but differs in specific peripheral configurations and memory sizes. The series is known for integrating standard 8051 functionality with modern silicon capabilities.

Replacement Considerations

Check for direct substitutes within the C8051F9xx family, such as the C8051F980, ensuring pinout and peripheral compatibility. Verify if newer generations from Silicon Labs offer equivalent performance with improved availability.