C8051F505-IQ

Overview

The C8051F505-IQ is an automotive-grade mixed-signal ISP Flash MCU from Silicon Labs, featuring a high-speed 8051 core operating at up to 50 MHz. It integrates 32 kB of in-system programmable Flash memory and 4.25 kB of internal data RAM. The device includes a 12-bit ADC with up to 200 ksps throughput and supports up to 32 external single-ended inputs. Digital peripherals include CAN 2.0, LIN 2.1, UART, SMBus, and SPI interfaces. It operates on a supply voltage of 1.8 V to 5.25 V and is housed in a QFP-48 package.

Feature Summary

• Automotive qualified to AEC-Q100 standards with extended temperature operation up to +125 °C
• Integrated on-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators
• Supports hardware-enhanced serial communication protocols including CAN 2.0 and LIN 2.1 controllers requiring no external crystal

Applications

• Motor control systems
• Sensor interface circuits
• Parking assistance modules
• Seat position and adjustment mechanisms
• Fluid level monitoring applications

Procurement Notes

Verify the component status before procurement as this part has reached End of Life (EOL) and Last Time Buy (LTB). Confirm that the specific ordering suffix matches the required package type and temperature grade. Ensure design updates account for the discontinuation timeline to prevent supply chain interruptions during production runs.

Selection Notes

Select this component when automotive qualification and robust analog integration are required within a constrained form factor. The C8051F50x series offers pin-for-pin compatibility with other members of the family, allowing flexibility in memory sizing while maintaining identical peripheral sets and package footprints across the product line.

Part Context

This microcontroller belongs to the C8051F50x/F51x mixed-signal ISP Flash MCU family designed by Silicon Laboratories. The series targets industrial and automotive environments, combining a pipelined 8051 CPU with extensive on-chip analog and digital peripherals. It serves as a standalone system-on-a-chip solution with integrated power management and clock oscillators.

Replacement Considerations

Silicon Labs recommends the EFM8BB31F64I-QFN32 as a replacement for this discontinued part number.