C8051F042R

Overview

The C8051F042R is an 8-bit mixed-signal microcontroller from the Silicon Labs C8051F04x family, housed in a 100-TQFP package. It features a CIP-51 core operating at up to 25 MHz with 64 KB of in-system programmable Flash and 4352 bytes of internal data RAM. The device includes a 10-bit SAR ADC with 13 external inputs, two 12-bit DACs, three analog comparators, and a precision voltage reference. Digital peripherals include CAN 2.0B, SMBus, SPI, and dual UARTs. It operates on a 2.7 V to 3.6 V supply within a -40°C to +85°C temperature range.

Feature Summary

• High-performance pipelined CIP-51 core delivering up to 25 MIPS throughput
• Integrated high-speed CAN 2.0B controller for robust communication
• On-chip JTAG debug circuitry enabling non-intrusive in-circuit debugging
• Mixed-signal capabilities with 10-bit ADC, 12-bit DACs, and analog comparators

Applications

• Industrial control systems requiring CAN bus connectivity
• Data acquisition systems utilizing multi-channel analog input
• Embedded devices needing precise waveform generation via DACs
• Sensor interface modules with integrated signal conditioning

Procurement Notes

Verify the specific suffix 'R' corresponds to the cut tape packaging format as indicated by distributor listings. Confirm the component status against the latest Product Change Notification (PCN) dated March 2026 regarding end-of-life timelines. Ensure compatibility with existing PCB footprints for the 100-TQFP package before finalizing procurement orders.

Selection Notes

Select this model when a complete mixed-signal solution with hardware CAN support is required. The C8051F042 variant specifically offers 10-bit ADC resolution compared to the 12-bit version found in the F040. Consider the 4352-byte RAM limit for complex application logic. Verify that the 2.7V to 3.6V supply range aligns with the system power architecture.

Part Context

This component belongs to the C8051F04x series of fully integrated mixed-signal System-on-Chip microcontrollers. The series is characterized by its high degree of integration, combining a fast 8051-compatible core with extensive analog and digital peripherals. The C8051F042R represents the specific pinout and packaging configuration within this broader family.

Replacement Considerations

Direct substitutes within the same family include C8051F040, C8051F041, C8051F043, C8051F044, C8051F045, C8051F046, and C8051F047. Differences primarily involve ADC resolution (12-bit vs 10-bit), Flash capacity, and port configurations. Verify peripheral availability matches design requirements when substituting.