C8051F503-IM

Overview

The C8051F503-IM is an automotive-grade mixed-signal microcontroller from Silicon Labs, featuring a high-speed pipelined 8051 core operating at up to 50 MHz. It integrates 64 kB of in-system programmable Flash memory and 4352 bytes of internal data RAM (including 4096 bytes XRAM). The device includes a 12-bit ADC with up to 200 ksps throughput, two comparators, and a built-in temperature sensor. Digital peripherals support CAN 2.0, LIN 2.1, UART, SMBus, SPI, and four 16-bit timers. It operates on a supply voltage of 1.8 V to 5.25 V within a -40 °C to +125 °C range and is housed in a 32-pin QFN package.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for extended temperature operation.
• Integrated CAN 2.0 and LIN 2.1 controllers enabling direct network connectivity without external transceivers or crystals.
• On-chip debug circuitry providing full-speed, non-intrusive in-system debugging capabilities.
• Flexible port I/O architecture with all pins being 5 V tolerant.

Applications

• Motor control systems
• Sensor interface modules
• Parking assistance units
• Fluid level monitoring

Procurement Notes

Verify component authenticity through authorized distributors or the manufacturer directly. Confirm that the specific revision matches project requirements, as this part is marked Not Recommended for New Designs. Ensure compliance with RoHS directives and check for any relevant Product Change Notices regarding manufacturing site updates or packaging modifications before finalizing procurement orders.

Selection Notes

Select this component when automotive reliability and integrated communication interfaces are required in a compact form factor. The 32-pin QFN package suits space-constrained designs. Consider the available pin count and peripheral set against application needs, noting that other series members offer different memory sizes or pin counts while maintaining pin-for-pin compatibility within their respective groups.

Part Context

This MCU belongs to the C8051F50x family, which shares architectural similarities with the C8051F51x and C8051F58x/59x series. These devices provide stand-alone System-on-a-Chip solutions with on-chip voltage regulators, power-on resets, and watchdog timers. The family emphasizes high integration, allowing significant performance and analog capability to be packed into small packages suitable for industrial and automotive environments.

Replacement Considerations

Silicon Labs recommends the EFM8BB52F16I-QFN20 as a replacement for this end-of-life component.