C8051F555-IMR

Overview

The C8051F555-IMR is an 8-bit mixed-signal microcontroller from Silicon Labs, featuring a high-speed CIP-51 core operating at up to 50 MHz. It integrates 16 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 a built-in temperature sensor. Connectivity options include CAN 2.0, LIN 2.1, SMBus, SPI, and UART interfaces. 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 architecture executing up to 70% of instructions in one or two system clocks for efficient processing.
• Integrated analog peripherals including a 12-bit ADC with selectable gain, window detector, and dual comparators with programmable hysteresis.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Flexible clocking system supporting internal oscillators and external sources with on-the-fly switching capabilities.

Applications

• Industrial control systems requiring robust communication protocols like CAN and LIN.
• Automotive electronics meeting AEC-Q100 qualification standards.
• Battery-powered devices utilizing low-power stop modes and wide voltage operation.
• Data acquisition systems leveraging the high-speed 12-bit ADC and temperature sensors.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix IMR corresponds to the tape-and-reel packaging variant required for automated assembly processes. Ensure compliance with RoHS directives and check for any relevant product change notices affecting manufacturing sites or materials prior to procurement.

Selection Notes

Select this model when 16 kB of Flash memory suffices for application code and 18 I/O pins are adequate. Consider alternative variants within the C8051F55x family if higher memory capacity or additional I/O ports are necessary. Evaluate power consumption requirements against typical active currents at desired clock speeds to ensure thermal and battery life constraints are met.

Part Context

This component belongs to the C8051F55x/56x/57x family of mixed-signal ISPs. These MCUs combine a standard 8051-compatible core with extensive on-chip peripherals, reducing bill-of-materials by integrating analog and digital functions typically found in discrete solutions. The family supports both industrial and automotive environments.

Replacement Considerations

Consult official documentation for cross-reference recommendations. Verify pin compatibility and peripheral availability before substituting with other 8051-based microcontrollers.

FAQ

Does the C8051F555-IMR require an external crystal for CAN bus operation?

No, the device features an internal 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 integrated ADC?

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