C8051F131

Overview

The C8051F131 is an 8-bit mixed-signal microcontroller from Silicon Labs, part of the C8051F12x/13x family. It features a high-speed 8051 core with up to 100 MIPS throughput and 128 kB of in-system programmable Flash memory. The device includes 8448 bytes of internal data RAM and supports operation at frequencies up to 100 MHz using an on-chip PLL. Analog peripherals consist of a 10-bit SAR ADC with up to 8 external inputs and a programmable window detector. Digital interfaces include two UARTs, SMBus, SPI, and a Programmable Counter Array. It operates within a voltage range of 3.0 V to 3.6 V at maximum speed and supports industrial temperatures from -40 °C to +85 °C.

Feature Summary

• High-performance pipelined 8051 core executing most instructions in one or two system clocks
• Integrated 10-bit SAR ADC with programmable gain amplifier and data-dependent windowed interrupt generator
• On-chip JTAG debug circuitry enabling full-speed non-intrusive in-circuit debugging and boundary scan
• Flexible clocking system with internal precision oscillator and phase-locked loop technology

Applications

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

Procurement Notes

Verify the specific suffix for package type and temperature grade against official ordering guides. Confirm RoHS compliance status if required by regulatory standards. Check for End-of-Life announcements or Last Time Buy notifications prior to finalizing procurement plans. Ensure development tools are compatible with the CIP-51 architecture.

Selection Notes

Select this component when a high-speed 8051 MCU with significant analog integration is required. The C8051F131 offers 128 kB Flash and 10-bit ADC capabilities suitable for complex control loops. Compare with the C8051F12x series if 12-bit DACs or 8-bit ADCs are needed instead. Evaluate power consumption requirements across idle and active modes.

Part Context

The C8051F131 belongs to the C8051F12x/13x family of fully integrated mixed-signal System-on-Chip microcontrollers. These devices combine a fast 8051 CPU with extensive on-chip resources, reducing external component counts. The family is designed for applications demanding high performance and precise analog signal processing in a compact form factor.

Replacement Considerations

Consult official documentation for direct pin-compatible or functional substitutes within the C8051F13x series. Verify memory size and peripheral availability when considering alternative models.