C8051F561-IMR

Overview

The C8051F561-IMR 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 MHz. It integrates 32 kB of in-system programmable Flash memory and 2304 bytes of internal data RAM (256 + 2048 XRAM). The device includes a 12-bit ADC with up to 200 ksps throughput, two comparators, and multiple digital peripherals including CAN 2.0, LIN 2.1, SMBus, SPI, and UART. It operates on a supply voltage of 1.8 V to 5.25 V and is housed in a 32-pin QFN package.

Feature Summary

• Integrated 12-bit ADC with selectable gain and programmable window detector for precise analog signal acquisition.
• Hardware-enhanced communication interfaces including CAN 2.0 and LIN 2.1 controllers that operate without external crystals.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without requiring separate emulator hardware.
• Flexible clocking system allowing on-the-fly switching between internal oscillators and external sources for power optimization.

Applications

• Automotive body control modules requiring AEC-Q100 qualification.
• Industrial sensor nodes utilizing high-resolution analog-to-digital conversion.
• Vehicle network gateways leveraging integrated CAN and LIN bus controllers.
• Battery-powered instrumentation benefiting from low-power stop mode operation.

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors or certified partners. Confirm the specific revision level matches design requirements, as the datasheet indicates this family is not recommended for new designs. Ensure environmental compliance documentation aligns with target market regulations before finalizing procurement orders.

Selection Notes

Select this component when existing designs utilize the C8051F56x architecture and require pin-compatible maintenance. Evaluate if the integrated CAN and LIN controllers meet specific automotive networking needs without external transceivers. Consider the 32-pin QFN footprint constraints and verify that the 32 kB Flash capacity suffices for current firmware expansion plans.

Part Context

This part belongs to the C8051F55x/56x/57x mixed-signal ISP Flash MCU family. These devices are designed for applications demanding high performance and rich peripheral integration within an 8-bit architecture. The family emphasizes ease of development through comprehensive on-chip debug capabilities and flexible clock management options suitable for diverse industrial and automotive environments.

Replacement Considerations

C8051F560-IMR

FAQ

Does the C8051F561-IMR require an external crystal for CAN and LIN controller operation?

No, the device features an internal 24 MHz oscillator with ±0.5% accuracy specifically calibrated for CAN and master LIN operation, eliminating the need for external crystals.

What is the maximum sampling rate of the integrated ADC?

The 12-bit ADC supports a maximum sampling rate of up to 200 ksps.