C8051F503-IQR

Overview

The C8051F503-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 64 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 sampling rate, two voltage comparators, and a built-in temperature sensor. Digital peripherals encompass CAN 2.0, LIN 2.1, UART, SMBus, SPI, four 16-bit timers, and a PCA. It supports a supply voltage range of 1.8 V to 5.25 V and operates within a temperature range of -40°C to +125°C.

Feature Summary

• High-performance 8051 core with pipelined architecture executing 70% of instructions in one or two system clocks
• Integrated analog peripherals including a 12-bit ADC, dual comparators, and on-chip temperature sensor
• Robust digital communication interfaces supporting CAN 2.0, LIN 2.1, UART, SMBus, and SPI without external crystals
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging

Applications

• Automotive systems requiring AEC-Q100 qualification
• Industrial control and monitoring applications
• Sensor interface circuits
• Motor control implementations

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin alignment against the 32-pin QFN specification. Ensure the ordering suffix matches the required tape-and-reel configuration for automated assembly processes. Cross-reference the datasheet revision to validate peripheral availability and electrical characteristics prior to integration.

Selection Notes

Select this model when a robust 8051 architecture with integrated automotive-grade communication controllers is required. The inclusion of CAN and LIN interfaces eliminates the need for external transceivers in many network topologies. Evaluate the 64 kB Flash capacity against application code size requirements. Consider the 1.8 V to 5.25 V supply range for flexible power design options across varying industrial environments.

Part Context

This component belongs to the C8051F50x/F51x mixed-signal ISP Flash MCU family produced by Silicon Laboratories. The series is characterized by its fully integrated mixed-signal capabilities and compatibility with standard 8051 toolchains. The specific part number denotes the 64 kB Flash variant housed in a 32-pin package, designed for compact form-factor applications requiring high integration.

Replacement Considerations

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