C8051F508-IM

Overview

The C8051F508-IM is an automotive-grade mixed-signal microcontroller from the Silicon Labs C8051F50x family. It features a high-speed 8051 core operating at up to 50 MHz, providing 50 MIPS throughput. The device integrates 64 kB of in-system programmable Flash memory and 4352 bytes of internal data RAM (256 + 4096 XRAM). Key peripherals include a 12-bit ADC with up to 200 ksps sampling rate, CAN 2.0 and LIN 2.1 controllers, multiple serial ports, and two comparators. It operates on a supply voltage of 1.8 V to 5.25 V and is housed in a 40-pin QFN package.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for operation in harsh environments
• Integrated CAN 2.0 and LIN 2.1 controllers enabling direct network connectivity without external transceivers or crystals
• On-chip debug circuitry supporting full-speed, non-intrusive in-system debugging via the C2 interface
• Flexible clock architecture allowing on-the-fly switching between internal oscillators and external sources

Applications

• Motor control systems requiring robust communication interfaces
• Sensor interface modules for industrial monitoring
• Parking assistance and seat position adjustment units
• Fluid level monitoring applications

Procurement Notes

Verify component authenticity through authorized distributors or Silicon Labs directly. Confirm the specific revision status, as documentation indicates this family may be marked 'Not Recommended for New Designs.' Ensure that the 40-pin QFN footprint matches your PCB layout requirements and validate thermal performance within the specified -40°C to +125°C operating range before finalizing procurement.

Selection Notes

Select this component when automotive reliability is required alongside integrated CAN/LIN capabilities. The C8051F508-IM offers a balance of processing power and analog integration suitable for constrained spaces. Consider pin-for-pin compatibility with other C8051F50x variants if future scalability is needed. Evaluate the 64 kB Flash size against application firmware requirements to ensure sufficient storage for complex logic and data logging.

Part Context

This part belongs to the C8051F50x/F51x mixed-signal ISP Flash MCU family. It shares architectural similarities with the C8051F51x series but differs in specific peripheral configurations and memory sizes. The device is designed as a standalone System-on-a-Chip solution, integrating essential components like voltage regulators, power-on reset, and watchdog timers to minimize external component count.

Replacement Considerations

Silicon Labs recommends the EFM8BB52F16I-QFN20 as a replacement for related end-of-life parts in this category. Verify functional equivalence and pin compatibility before substitution.