C8051F500-IM

Overview

The C8051F500-IM is an 8-bit mixed-signal microcontroller from the Silicon Labs C8051F50x family, housed in a 48-pin QFN package. It features a high-speed pipelined 8051 core operating at up to 50 MHz with 64 kB of in-system programmable Flash and 4352 bytes of internal data RAM. The device integrates a 12-bit ADC supporting up to 200 ksps with 32 external single-ended inputs, two voltage comparators, and a built-in temperature sensor. Digital peripherals include CAN 2.0, LIN 2.1, SMBus, SPI, UART, four 16-bit timers, and a 16-bit PCA. It operates on a supply voltage of 1.8 V to 5.25 V and supports an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• High-performance 8051 core executing 70% of instructions in one or two system clocks for efficient processing.
• Integrated analog subsystem featuring a 12-bit ADC with selectable gain and multiple input channels alongside dual comparators.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Robust communication interfaces including hardware-enhanced CAN 2.0 and LIN 2.1 controllers requiring no external crystal.

Applications

• Industrial control systems requiring precise analog signal acquisition and processing.
• Automotive applications meeting AEC-Q100 qualification standards for harsh environments.
• Sensor interface modules utilizing the integrated temperature sensor and high-resolution ADC.
• Motor control implementations leveraging the Programmable Counter Array for PWM generation.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required package variant. Check for recent Product Change Notifications regarding assembly site or material updates. Ensure compliance with RoHS3 specifications for environmental regulations. Validate that the procurement source provides valid traceability documentation for quality assurance purposes.

Selection Notes

Select this component when a fully integrated mixed-signal solution is required to minimize external components. Consider the 48-pin QFN footprint for space-constrained designs needing extensive I/O capabilities. Evaluate the internal oscillator accuracy if external clock sources are undesirable. Assess the power consumption requirements against the typical stop mode current specifications for battery-operated applications.

Part Context

This part belongs to the C8051F50x/F51x family of mixed-signal ISP Flash MCUs. The series is characterized by its high integration level, combining a fast 8051 CPU with significant analog and digital peripherals on a single chip. The family targets applications demanding cost-effective, high-performance embedded control with robust connectivity options.

Replacement Considerations

Silicon Labs recommends alternative devices as this family is not recommended for new designs. Consult official substitution guides for compatible successors within the EFM8 or newer C8051 series that maintain similar pinouts and peripheral sets.

FAQ

Does the C8051F500-IM require an external crystal for CAN bus operation?

No, the device includes a precision internal 24 MHz oscillator specifically calibrated 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 Analog-to-Digital Converter supports a maximum sampling rate of 200 ksps.