C8051F555-IM

Overview

The C8051F555-IMR is an 8-bit mixed-signal ISP Flash MCU from the C8051F55x family by Silicon Labs. It features a high-speed 8051 core with up to 50 MIPS throughput at a 50 MHz clock speed. The device includes 16 kB of in-system programmable Flash memory and 2304 bytes of internal data RAM (256 + 2048 XRAM). Key peripherals include a 12-bit ADC, two comparators, CAN 2.0 and LIN 2.1 controllers, and hardware-enhanced serial ports. It operates on a supply voltage of 1.8 V to 5.25 V and is housed in a 24-pin QFN package.

Feature Summary

• Integrated 12-bit ADC supporting up to 200 ksps conversion rates with selectable gain and window detection capabilities.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Hardware-accelerated communication interfaces including CAN 2.0 and LIN 2.1 controllers that operate without requiring external crystals.

Applications

• Automotive embedded systems requiring AEC-Q100 qualification
• Industrial control applications utilizing CAN or LIN bus protocols
• Data acquisition systems employing high-speed analog-to-digital conversion

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors. Confirm package integrity upon receipt as the unit utilizes a leadless QFN form factor. Ensure storage conditions comply with moisture sensitivity levels specified in the datasheet. Cross-reference ordering information to confirm the specific suffix matches design requirements before finalizing procurement orders.

Selection Notes

Select this component for designs requiring integrated CAN and LIN support within a compact 24-pin footprint. Evaluate memory constraints against the 16 kB Flash and 2304-byte RAM limits. Consider power consumption profiles, noting typical operating current at maximum frequency versus stop mode leakage. Verify peripheral availability aligns with system interface requirements compared to other members of the F55x family.

Part Context

This microcontroller belongs to the C8051F55x/56x/57x series, which are mixed-signal ISP Flash MCUs designed for high-performance embedded applications. The family shares a common architecture featuring the CIP-51 core and extensive analog peripherals. These devices are explicitly marked as Not Recommended for New Designs by the manufacturer.

Replacement Considerations

Consult official Silicon Labs documentation for qualified substitute part numbers within the same product family or next-generation equivalents. Verify pin compatibility and peripheral mapping when transitioning to alternative components.

FAQ

Does the C8051F555 require an external crystal for CAN operation?

No, the integrated CAN 2.0 controller does not require an external crystal for operation.

What is the maximum sampling rate of the onboard ADC?

The 12-bit ADC supports sampling rates of up to 200 ksps.