C8051F508-IMR

Overview

The C8051F508-IMR is an 8-bit mixed-signal microcontroller from the Silicon Labs C8051F50x family, 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 (256 + 4096 XRAM). The device includes a 12-bit ADC with up to 200 ksps throughput, two comparators, and a built-in temperature sensor. Digital peripherals include CAN 2.0, LIN 2.1, SMBus, SPI, and UART controllers. 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

• Integrated CAN 2.0 and LIN 2.1 controllers that operate without requiring external crystals
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without separate emulator hardware
• Flexible port I/O architecture with all pins being 5 V tolerant and configurable via a priority crossbar decoder

Applications

• Industrial control systems utilizing CAN or LIN bus communication
• Automotive electronic modules requiring AEC-Q100 qualification
• Mixed-signal data acquisition systems leveraging the integrated 12-bit ADC and comparators

Procurement Notes

Verify the specific suffix 'IMR' corresponds to the tape-and-reel packaging variant rather than the tube-packaged 'IM' version. Confirm the component status as this family is marked Not Recommended for New Designs; check for active obsolescence notices or recommended replacement families before finalizing procurement plans.

Selection Notes

Select this component when a robust 8051 architecture with native automotive-grade serial protocols is required. Ensure the design accommodates the 40-pin QFN footprint and utilizes the internal oscillator precision features for CAN/LIN timing. Evaluate power consumption requirements against the typical stop mode current specifications provided in the datasheet.

Part Context

This part belongs to the C8051F50x/F51x mixed-signal ISP Flash MCU family by Silicon Laboratories. The family shares a common core and peripheral set, differentiated primarily by memory sizes and pin counts. The C8051F508 specifically targets applications needing 64 kB Flash within a compact 40-pin form factor.

Replacement Considerations

Silicon Labs recommends the EFM8BB52F32I-C-QFN32 as a manufacturer-recommended alternative.