C8051F042-GQ

Overview

The C8051F042-GQ is an 8-bit microcontroller from the Silicon Labs C8051F04x family, featuring a high-speed pipelined 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 support 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 and is housed in a 100-pin TQFP package.

Feature Summary

• Integrates a high-performance 8051 core with up to 25 MIPS throughput and full-speed non-intrusive JTAG debug capabilities.
• Features mixed-signal analog peripherals including a 10-bit ADC with programmable gain amplifier and three analog comparators.
• Provides comprehensive digital communication interfaces such as CAN 2.0B, SMBus, SPI, and two concurrent UART ports.
• Supports in-system programming via ISP and includes extensive power management modes for energy efficiency.

Applications

• Industrial control systems requiring robust analog signal processing
• Automotive applications utilizing CAN bus communication
• Data acquisition systems with multi-channel sensor inputs
• Embedded devices needing precise voltage monitoring and regulation

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific revision level matches project requirements, as the datasheet indicates this family is not recommended for new designs. Ensure proper handling procedures are followed due to surface-mount packaging specifications.

Selection Notes

Select this component when a fully integrated mixed-signal MCU with CAN connectivity is required. Consider the 10-bit ADC resolution and 64 kB Flash capacity against application memory needs. Evaluate the 100-pin TQFP footprint for PCB layout constraints. Verify that the 2.7 V to 3.6 V supply range aligns with system power architecture.

Part Context

This part belongs to the C8051F04x series of fully integrated mixed-signal microcontrollers. The family shares a common CIP-51 core architecture but varies in peripheral sets and memory sizes. The GQ suffix denotes the 100-pin TQFP package variant suitable for high-density board designs.

Replacement Considerations

Silicon Labs recommends alternative solutions as this family is not recommended for new designs. Consult official documentation for current compatible replacements within the C8051F or EFM8 families.