C8051F044

Overview

The C8051F044 is a mixed-signal microcontroller from the C8051F04x family, featuring a high-speed 8051 core with up to 25 MIPS throughput at a 25 MHz clock frequency. 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 a Bosch CAN controller, hardware SMBus, SPI, two UARTs, six PCA capture/compare modules, and five general-purpose 16-bit timers. It operates on a 2.7 V to 3.6 V supply within a –40 °C to +85 °C temperature range.

Feature Summary

• Integrates a pipelined 8051 core executing 70% of instructions in one or two system clocks for high throughput.
• Features a 10-bit SAR ADC with programmable gain amplifier and windowed interrupt generator for precise analog monitoring.
• Includes on-chip JTAG debug circuitry supporting breakpoints, single-stepping, and non-intrusive in-circuit debugging.
• Provides multiple power-saving sleep and shutdown modes controlled by user software for energy efficiency.

Applications

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

Procurement Notes

Verify the specific suffix (e.g., -GQ) against the manufacturer's current datasheet to confirm package type and temperature grade. Confirm that the component is not designated as End-of-Life or Not Recommended for New Designs before finalizing procurement plans. Ensure development tools are compatible with the CIP-51 architecture.

Selection Notes

Select this model when a standalone system-on-chip solution with integrated CAN and high-resolution analog peripherals is required. It is suitable for designs needing 64 kB of Flash and extensive I/O capabilities without external components. Consider the TQFP-100 package constraints and verify that the 2.7 V to 3.6 V supply range matches the system power budget.

Part Context

The C8051F044 belongs to the C8051F04x series of fully static mixed-signal microcontrollers. This family is characterized by its high integration, combining a fast 8051 core with rich analog and digital peripherals on a single chip. The series supports in-system programming and offers various package options to accommodate different pin count and form factor requirements.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult Silicon Labs for current product line updates or alternative families if this specific part is discontinued.

FAQ

Does the C8051F044 include an 8-bit ADC?

No, the C8051F044 features a 10-bit SAR ADC. The 8-bit ADC is only available in the C8051F040/1/2/3 variants.

What is the maximum operating frequency of the C8051F044?

The C8051F044 supports a maximum system clock frequency of 25 MHz, delivering up to 25 MIPS throughput.