C8051F043R

Overview

The C8051F043R is a mixed-signal microcontroller from the C8051F04x family, featuring an enhanced 8051 core operating at up to 25 MHz. It integrates 64 kB of in-system programmable Flash memory and 4352 bytes of internal data RAM. The device includes a 10-bit SAR ADC with 13 external inputs, three analog comparators, and a precision voltage reference. Digital peripherals consist of two UARTs, SPI, SMBus, and a CAN controller. 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 8051 core delivering up to 25 MIPS throughput
• Integrated 10-bit SAR ADC with programmable gain amplifier and windowed interrupt generator
• On-chip JTAG debug circuitry supporting non-intrusive in-circuit debugging
• Bosch CAN 2.0B controller alongside multiple serial communication interfaces

Applications

• Portable medical equipment
• Weigh scales
• Test equipment
• Fiber optic systems

Procurement Notes

Verify the specific suffix 'R' against the manufacturer's official documentation to confirm tape-and-reel packaging status or any minor electrical variations. Ensure the component meets the required RoHS compliance standards for your assembly process. Cross-reference the full part number with the latest datasheet revision to confirm availability and last-time buy status.

Selection Notes

Select this model when a standalone system-on-chip solution with high analog integration is required. It is suitable for applications needing concurrent access to CAN, UART, and SPI interfaces. Consider the 10-bit ADC resolution and 13-channel multiplexer if signal conditioning via the internal PGA is necessary. Verify package compatibility with the available TQFP-100 footprint.

Part Context

This component belongs to the C8051F04x series of highly integrated mixed-signal microcontrollers by Silicon Labs. The series is characterized by its complete on-chip resources, eliminating the need for external support components. It utilizes the CIP-51 architecture, which maintains full 8051 instruction set compatibility while offering significantly improved execution speeds through a pipelined design.

Replacement Considerations

Silicon Labs has announced End of Life (EOL) for the C8051F040/1/2/3/4/5/6/7 family. Recommended replacements include EFM32PG26B301F2048IL136 from the EFR32PG26 Series 2 MCUs.