C8051F561-IM

Overview

The C8051F561-IM is an 8-bit mixed-signal microcontroller from the Silicon Labs C8051F56x family, featuring a high-speed CIP-51 core operating at up to 50 MIPS. It integrates 32 kB of in-system programmable Flash memory and 2304 bytes of internal data RAM. The device includes a 12-bit ADC with up to 200 ksps sampling rate, two comparators, and a built-in temperature sensor. Communication interfaces include CAN 2.0, LIN 2.1, UART, SMBus, and SPI. It operates on a supply voltage of 1.8 V to 5.25 V, supports AEC-Q100 automotive qualification, and functions within a temperature range of –40 °C to +125 °C.

Feature Summary

• High-performance 8051-compatible core with pipelined architecture executing most instructions in one or two system clocks
• Integrated analog peripherals including a 12-bit ADC with selectable gain and window detector capabilities
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators
• Automotive-grade reliability with AEC-Q100 qualification and wide operating temperature range

Applications

• Automotive body control modules requiring CAN and LIN communication
• Industrial monitoring systems utilizing integrated temperature sensors and ADCs
• Embedded control applications needing in-circuit reprogrammable Flash firmware
• Low-power battery-operated devices leveraging stop mode current reduction

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors or certified partners. Confirm the specific package variant matches design requirements, as the C8051F56x series utilizes multiple pin configurations. Check for recent Product Change Notices regarding assembly or labeling updates. Ensure compliance with RoHS3 standards if required by regional regulations. Validate that the selected part number aligns with current availability status, as older revisions may be subject to obsolescence notices.

Selection Notes

Select this MCU when a robust 8-bit solution with integrated CAN/LIN controllers is required for space-constrained designs. The 32-pin QFN package offers a compact footprint suitable for dense PCB layouts. Consider the internal oscillator accuracy for applications demanding precise timing without external crystals. Evaluate power consumption profiles against idle and stop mode specifications for battery-sensitive projects. Ensure peripheral counts meet interface needs before considering larger pin-count variants in the same family.

Part Context

The C8051F561-IM belongs to the C8051F55x/56x/57x mixed-signal ISP Flash MCU family developed by Silicon Laboratories. This series is designed for high integration, combining a fast 8051 core with extensive analog and digital peripherals on a single chip. The family emphasizes ease of development through on-chip debug capabilities and supports both industrial and automotive environments. Pin-for-pin compatibility exists within specific sub-series to facilitate design upgrades.

Replacement Considerations

Direct substitutes within the same package and feature set are limited due to the 'Not Recommended for New Designs' status. Review the C8051F56x datasheet for pin-compatible alternatives such as other members of the F56x series with matching Flash sizes. Cross-reference with newer Silicon Labs MCU families like EFM8 or C8051F9xx for modern replacements, ensuring interface and performance requirements are met.