C8051F561-IQ

Overview

The C8051F561-IQ is an 8-bit mixed-signal ISP Flash MCU from the C8051F55x/56x/57x family, featuring a high-speed CIP-51 core with up to 50 MIPS throughput at 50 MHz. It integrates 32 kB of in-system programmable Flash and 2304 bytes of internal data RAM (256 + 2048 XRAM). The device includes a 12-bit ADC with up to 200 ksps conversion rate, two comparators, CAN 2.0 and LIN 2.1 controllers, and hardware-enhanced UART, SMBus, and SPI interfaces. Operating on a supply voltage of 1.8 V to 5.25 V, it supports automotive qualification within a temperature range of –40 °C to +125 °C.

Feature Summary

• Integrated 12-bit ADC with selectable gain and built-in temperature sensor for precise analog signal acquisition.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Hardware-accelerated communication peripherals including CAN 2.0, LIN 2.1, UART, SMBus, and SPI.
• Pipelined instruction architecture executing 70% of instructions in one or two system clocks for efficient processing.

Applications

• Automotive embedded systems requiring AEC-Q100 compliance.
• Industrial control applications utilizing CAN and LIN bus connectivity.
• Mixed-signal data acquisition systems employing high-resolution analog-to-digital conversion.
• Embedded modems and voice over Internet protocol devices needing integrated serial interfaces.

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors or certified partners. Confirm the specific suffix matches the required package type and operating temperature range. Check current lifecycle status as this family may be marked Not Recommended for New Designs. Ensure ESD protection protocols are followed during handling and assembly to maintain device integrity.

Selection Notes

Select this model when a robust 8-bit solution with integrated CAN/LIN controllers and high-speed ADC is required. Consider the 32 kB Flash capacity against application code size requirements. Evaluate the 32-pin QFP/QFN package constraints for PCB layout. Verify that the 1.8 V to 5.25 V supply range aligns with the target system power architecture.

Part Context

This component belongs to the C8051F55x/56x/57x series of mixed-signal microcontrollers designed for cost-sensitive and high-performance applications. The family shares a common peripheral set and core architecture, differing primarily in memory sizes and pin counts. These MCUs bridge the gap between standard 8-bit controllers and more complex 32-bit solutions by offering extensive analog integration on a single chip.

Replacement Considerations

Consult official Silicon Labs documentation for verified cross-references within the C8051F5xx family. No direct public substitute part numbers are confirmed in the provided source material. Ensure any replacement maintains compatibility with the C2 interface and existing firmware architecture.