C8051F040

Overview

The C8051F040 is a mixed-signal microcontroller featuring a high-speed 8051 core operating at up to 25 MHz. It integrates 64 kB of Flash memory and 4352 bytes of internal data RAM. The device includes a 12-bit SAR ADC with 13 external inputs, two 12-bit DACs, three analog comparators, and a precision voltage reference. Digital peripherals consist of a Bosch CAN controller, hardware SMBus, SPI, and dual UARTs. It supports an external 64 kB data memory interface and operates within a supply voltage range of 2.7 V to 3.6 V across a temperature range of –40 °C to +85 °C.

Feature Summary

• High-performance pipelined 8051 core executing 70% of instructions in one or two system clocks
• Integrated 12-bit SAR ADC with programmable throughput and high-voltage difference amplifier
• On-chip JTAG debug circuitry supporting breakpoints, single-stepping, and boundary scan
• Bosch CAN 2.0B controller with concurrent support for SMBus, SPI, and dual UART interfaces

Applications

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

Procurement Notes

Verify the specific revision level against the latest Silicon Labs documentation before integration. Confirm that the target application environment remains within the specified 2.7 V to 3.6 V supply voltage limits. Ensure proper handling procedures are followed due to moisture sensitivity classification. Cross-reference pinout configurations if utilizing alternative packages within the same family.

Selection Notes

Select this component when a fully integrated mixed-signal solution with on-chip debugging is required. The inclusion of a 12-bit ADC and dual DACs makes it suitable for precise analog signal processing tasks. The dedicated CAN interface facilitates robust communication in industrial environments. Consider the available I/O count and memory size relative to application complexity.

Part Context

This device belongs to the C8051F04x series of highly integrated mixed-signal microcontrollers from Silicon Labs. The series is characterized by its complete system-on-chip architecture, combining a fast 8051 processor with extensive analog and digital peripherals. This specific model represents the variant equipped with the highest resolution analog-to-digital conversion capabilities within the standard flash configuration.

Replacement Considerations

Silicon Labs recommends the EFM32PG26B301F2048IL136 as a replacement for this part.