C8051F591-IM

Overview

The C8051F591-IM is an 8-bit mixed-signal microcontroller from the C8051F58x/F59x family, featuring a high-speed CIP-51 core operating at up to 50 MHz. It integrates 128 kB of in-system programmable Flash memory and 8448 bytes of internal data RAM (including 8192 bytes XRAM). The device includes a 12-bit ADC with up to 32 external inputs, three comparators, CAN 2.0 and LIN 2.1 controllers, two UARTs, SMBus, and SPI interfaces. Powered by a 1.8 V to 5.25 V supply, it utilizes a 40-pin QFN package and supports operation across a temperature range of –40 °C to +125 °C.

Feature Summary

• High-performance CIP-51 core with pipelined architecture delivering up to 50 MIPS throughput.
• Integrated analog peripherals including a 12-bit ADC, voltage reference, and programmable comparators.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Automotive qualified for extended temperature ranges with robust digital communication interfaces.

Applications

• Industrial control systems requiring CAN and LIN bus connectivity
• Automotive embedded applications needing wide temperature tolerance
• Mixed-signal data acquisition systems utilizing high-resolution ADCs
• Embedded devices requiring in-system programming capabilities

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors or certified partners. Confirm that the specific part number matches the required package variant and temperature grade. Review the latest datasheet revision for any updates regarding electrical characteristics or pin definitions before finalizing procurement specifications.

Selection Notes

Select this model when system requirements demand automotive qualification alongside mixed-signal processing capabilities. Ensure the design accommodates the 40-pin QFN footprint and operates within the specified 1.8 V to 5.25 V voltage range. Consider the available I/O count and peripheral set against application complexity to optimize resource utilization.

Part Context

This component belongs to the C8051F58x/F59x series of fully integrated mixed-signal microcontrollers. The family combines a standard 8051-compatible instruction set with extensive on-chip peripherals, reducing the need for external support chips. It targets applications requiring high reliability and compact form factors in industrial and automotive sectors.

Replacement Considerations

Consult the official datasheet for cross-reference information. Verify compatibility with existing firmware and hardware layouts if substituting with other members of the C8051F58x/F59x family or newer Silicon Labs MCU generations.

FAQ

Does the C8051F591-IM require an external crystal for CAN and LIN operation?

No, the device features a programmable 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 sampling rates of up to 200 ksps.