C8051F505-IM

Overview

The C8051F505-IM is an automotive and industrial mixed-signal microcontroller from the 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 (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 temperature range of –40 °C to +125 °C and is housed in a 48-pin QFN package.

Feature Summary

• Automotive-grade qualification compliant with AEC-Q100 standards for robust operation in demanding environments.
• Integrated CAN 2.0 and LIN 2.1 controllers that eliminate the need for external transceivers or crystals.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Flexible clock architecture allowing on-the-fly switching between internal oscillators and external sources.

Applications

• Motor control systems
• Sensor interface modules
• Parking assistance units
• Seat position adjustment mechanisms

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors or certified partners. Confirm the specific ordering suffix matches the required package variant and temperature grade. Check for current lifecycle status as this series may be subject to obsolescence notices. Ensure compatibility with existing design tools and development kits before finalizing procurement orders.

Selection Notes

Select this model when automotive reliability and integrated communication interfaces are required. The 64 kB Flash capacity suits applications needing substantial code storage. Verify pin count requirements against the 48-pin QFN footprint. Consider power consumption profiles if battery-operated designs are involved, noting the stop mode current specifications.

Part Context

This component belongs to the C8051F50x/F51x family of mixed-signal ISPs. It shares architectural similarities with other members like the C8051F501 and C8051F506 but differs in memory size and I/O configuration. The family emphasizes high integration by combining analog peripherals with digital communication controllers on a single chip.

Replacement Considerations

Silicon Labs recommends the EFM8BB52F16I-QFN20 as a replacement for this part due to its end-of-life status. Evaluate functional equivalence regarding memory, peripheral availability, and package dimensions during migration planning.

FAQ

Does the C8051F505-IM require an external crystal for CAN or LIN communication?

No, the device features a precise internal 24 MHz oscillator with ±0.5% accuracy, which is sufficient for CAN and master LIN operation without external components.

What is the maximum sampling rate of the integrated ADC?

The 12-bit ADC supports a maximum sampling rate of up to 200 ksps.