C8051F551-IMR

Overview

The C8051F551-IMR is an 8-bit mixed-signal microcontroller from the Silicon Labs C8051F55x 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 memory 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, and multiple digital peripherals including CAN 2.0, LIN 2.1, UART, SMBus, and SPI. 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

• High-performance pipelined CIP-51 core executing up to 70% of instructions in one or two system clocks
• Integrated 12-bit analog-to-digital converter supporting burst mode and selectable gain
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators
• Dual CAN 2.0 and LIN 2.1 controllers capable of operation without external crystals

Applications

• Industrial control systems requiring robust communication interfaces
• Automotive applications meeting AEC-Q100 qualification standards
• Smart sensors utilizing integrated temperature sensing and ADC capabilities
• Battery-powered devices leveraging low-power stop modes

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 ESD handling protocols are followed during storage and assembly. Cross-reference ordering suffixes to confirm package type and temperature range alignment with design specifications.

Selection Notes

Select this component for designs requiring a fully integrated mixed-signal solution within a compact 24-pin footprint. The inclusion of CAN and LIN controllers eliminates the need for external transceivers in many automotive and industrial scenarios. Evaluate power consumption profiles against application needs, noting typical operating current at maximum clock speeds versus stop mode leakage. Ensure software development tools support the CIP-51 architecture for efficient code deployment.

Part Context

This part belongs to the C8051F55x/56x/57x family of mixed-signal ISPs. These microcontrollers are designed for high-performance embedded applications demanding precise analog control alongside digital processing. The family shares common architectural features such as the priority crossbar decoder and flexible clocking options, allowing for scalable design implementations across different pin counts and memory configurations.

Replacement Considerations

Public documentation indicates that the C8051F551-IM variant is obsolete. Designers should evaluate the C8051F550-IM as a potential substitute, verifying pin compatibility and memory configuration differences before implementation.