C8051F552-IMR

Overview

The C8051F552-IMR is an 8-bit mixed-signal microcontroller from the Silicon Labs C8051F55x family, housed in a 24-pin QFN package. It features a high-speed CIP-51 core operating at up to 50 MHz with pipelined architecture. The device includes 32 kB of in-system programmable Flash memory and 2304 bytes of internal data RAM (256 + 2048 XRAM). Analog peripherals consist of a 12-bit ADC supporting up to 200 ksps and two comparators. Digital interfaces include 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 supports temperatures from -40 °C to +125 °C.

Feature Summary

• High-performance CIP-51 core with pipelined instruction execution achieving up to 50 MIPS throughput.
• Integrated 12-bit analog-to-digital converter with selectable gain and built-in temperature sensor.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Hardware-enhanced serial communication controllers for CAN 2.0, LIN 2.1, SMBus, SPI, and UART.

Applications

• Industrial control systems requiring robust communication protocols
• Automotive applications meeting AEC-Q100 qualification standards
• Smart sensors utilizing integrated analog signal conditioning
• Embedded devices needing low-power stop mode operation

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors or certified partners. Confirm the specific revision level matches project requirements, as datasheet revisions may update electrical characteristics or pin definitions. Ensure the ordering suffix corresponds to the correct tape-and-reel packaging format for automated assembly lines. Cross-reference the part number against current obsolescence notices to confirm availability status.

Selection Notes

Select this component when a complete mixed-signal solution is required within a compact 24-pin footprint. The C8051F552 variant provides 32 kB of Flash, distinguishing it from lower-capacity models like the F550. Consider the internal oscillator accuracy if precise timing is critical for CAN or LIN master operations without external crystals. Evaluate the available I/O count against system interface requirements before choosing higher-pin-count family members.

Part Context

This microcontroller belongs to the C8051F55x/56x/57x family, which shares a common architectural foundation but varies in memory size and I/O count. The C8051F552 specifically offers 32 kB of Flash and 24 pins, positioning it between the smaller F550 and larger F56x series. All family members support the same peripheral set and development tools, ensuring code portability across the range.

Replacement Considerations

The C8051F552-IM is a tube-packaged equivalent of the IMR variant. Other family members such as the C8051F550 or C8051F551 share identical pinouts and functionality but differ in Flash capacity. Verify that any substitute maintains the required 32 kB program memory size and 24-pin QFN package dimensions.

FAQ

Does the C8051F552 require an external crystal for CAN bus operation?

No, the device includes an internal 24 MHz oscillator with sufficient accuracy for CAN and master LIN operation, eliminating the need for an external crystal.

What is the maximum sampling rate of the onboard ADC?

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