C8051F040R

Overview

The C8051F040R is a highly integrated mixed-signal microcontroller featuring a pipelined 8051 core operating at up to 25 MHz. It includes 64 kB of in-system programmable Flash memory and 4352 bytes of internal data RAM. The device integrates a 12-bit SAR ADC with 13 external inputs, two 12-bit DACs, three analog comparators, and a precision voltage reference. Digital peripherals include a Bosch CAN 2.0B controller, hardware SMBus/I2C, SPI, and dual UARTs. It operates on a 2.7 V to 3.6 V supply within the -40 °C to +85 °C temperature range.

Feature Summary

• High-speed 8051 core with pipelined architecture delivering up to 25 MIPS throughput
• Integrated 12-bit SAR ADC with programmable high-voltage difference amplifier and windowed interrupt generator
• On-chip JTAG debug circuitry supporting full-speed non-intrusive in-circuit debugging
• Hardware support for multiple serial communication protocols including CAN, SMBus, SPI, and UART

Applications

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

Procurement Notes

Verify the specific ordering suffix 'R' against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Confirm that the component status is End-of-Life (EOL) and check for available Last Time Buy options or approved replacement parts such as the EFM32PG26B301F2048IL136 before finalizing procurement plans.

Selection Notes

Select this MCU when a standalone system-on-chip solution with high analog integration is required. The combination of a 12-bit ADC, DACs, and comparators reduces external component count. Ensure the design utilizes the 2.7 V to 3.6 V supply range and leverages the internal oscillator or external clock sources appropriate for the application timing requirements.

Part Context

This part belongs to the C8051F04x series of 8-bit microcontrollers from Silicon Labs. These devices are designed as analog-intensive SoCs, merging a powerful 8051 processor with extensive peripheral sets. The series emphasizes high performance and low power consumption through various sleep modes, targeting applications demanding precise signal processing and robust digital control capabilities.

Replacement Considerations

Silicon Labs recommends the EFM32PG26B301F2048IL136 as a replacement for this end-of-life part.