C8051F585-IQR

Overview

The C8051F585-IQR is an 8-bit mixed-signal microcontroller from the Silicon Labs C8051F58x/F59x family, featuring a high-speed 8051 core operating at up to 50 MHz. It integrates 128 kB of in-system programmable Flash memory and 8448 bytes of internal data RAM (256 + 8192 XRAM). The device includes a 12-bit ADC with up to 32 external inputs, three comparators, CAN 2.0 and LIN 2.1 controllers, two UARTs, SMBus, and SPI interfaces. It operates on a supply voltage of 1.8 V to 5.25 V and supports automotive temperature ranges from -40 °C to +125 °C.

Feature Summary

• Integrated 12-bit ADC with selectable gain and built-in temperature sensor for precise analog signal acquisition.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Hardware support for CAN 2.0 and LIN 2.1 protocols without requiring external crystals.
• High-speed pipelined 8051 core executing 70% of instructions in one or two system clocks.

Applications

• Automotive embedded systems requiring CAN and LIN communication.
• Industrial control applications utilizing mixed-signal processing.
• Battery-powered devices benefiting from low-power stop modes.
• Motor control systems requiring PWM and timer peripherals.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific package variant matches design requirements, as the F58x family utilizes multiple pinouts including QFP-48 and QFN-48. Check for recent Product Change Notifications regarding assembly site or labeling updates. Ensure development tools are compatible with the C2 interface for programming and debugging.

Selection Notes

Select this model when 128 kB of Flash and extensive analog peripherals are required within a 48-pin footprint. Consider the C8051F58x series for designs needing integrated CAN/LIN controllers without external transceivers. Evaluate power consumption specifications against application needs, noting typical operating current at maximum clock speeds. Verify that the 1.8 V to 5.25 V supply range aligns with the target system's power architecture.

Part Context

The C8051F585-IQR belongs to the C8051F58x/F59x family of highly integrated mixed-signal MCUs. This series combines a fast 8051 core with significant on-chip memory and diverse digital/analog peripherals. The family is designed for cost-sensitive applications requiring robust connectivity and analog capabilities in a compact form factor.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.

FAQ

Does the C8051F585-IQR require an external crystal for CAN operation?

No, the device features an internal 24 MHz oscillator with ±0.5% accuracy sufficient for CAN and master LIN operation without an external crystal.

What is the maximum throughput of the CPU core?

The pipelined instruction architecture allows for up to 50 MIPS throughput when operating at a 50 MHz clock frequency.