C8051F506-IQR

Overview

The C8051F506-IQR 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 32 KB of in-system programmable Flash memory and 4.25 KB of internal data RAM (256 bytes general purpose + 4096 bytes XRAM). The device includes a 12-bit ADC with up to 200 ksps throughput, two comparators, and multiple digital peripherals including CAN 2.0, LIN 2.1, SMBus, SPI, and UART. It operates on a supply voltage of 1.8 V to 5.25 V and is housed in a 32-pin QFP package.

Feature Summary

• Integrates a high-speed 8051 core with pipelined architecture for efficient instruction execution.
• Includes on-chip debug circuitry supporting full-speed, non-intrusive in-system debugging without external emulators.
• Features a flexible interrupt system and a priority crossbar decoder for dynamic pin-to-peripheral assignment.
• Supports automotive qualification standards with operation across a wide temperature range.

Applications

• Industrial control systems requiring robust signal processing and communication.
• Automotive applications meeting AEC-Q100 reliability standards.
• Sensor interfaces utilizing integrated analog peripherals like ADC and comparators.
• Networked devices leveraging built-in CAN and LIN controllers.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required package type and temperature rating. Review the latest datasheet revision for any errata or design warnings. Ensure compatibility with existing development tools and programming interfaces before finalizing procurement decisions.

Selection Notes

Select this model when a compact 32-pin footprint is required alongside substantial onboard Flash and analog capabilities. Consider the integrated CAN and LIN controllers if serial communication without external transceivers is needed. Evaluate the 1.8 V to 5.25 V supply range against power constraints. Note that this family is marked as not recommended for new designs; assess long-term availability and lifecycle status carefully.

Part Context

This component belongs to the C8051F50x/F51x mixed-signal ISP Flash MCU family by Silicon Laboratories. The series is characterized by its fully integrated mixed-signal capabilities, combining a standard 8051-compatible CPU with extensive on-chip peripherals. The family targets cost-sensitive applications needing high integration levels in a small form factor.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult official Silicon Labs resources for current family alternatives or updated components suitable for new designs.

FAQ

Does the C8051F506-IQR require an external crystal for CAN bus operation?

No, the device features an internal 24 MHz oscillator with sufficient accuracy for CAN and master LIN operation, eliminating the need for an external crystal.

What is the maximum sampling rate of the integrated ADC?

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

Is the C8051F506-IQR suitable for automotive environments?

Yes, the device is compliant with AEC-Q100 standards and operates within the –40 °C to +125 °C temperature range, making it qualified for automotive applications.