C8051F314

Overview

The C8051F314 is an 8-bit mixed-signal microcontroller from Silicon Labs, part of the C8051F31x family. It features a high-speed CIP-51 core operating at up to 25 MIPS with a 25 MHz clock. The device integrates 8 kB of ISP Flash memory and 1280 bytes of internal data RAM. Key peripherals include four general-purpose 16-bit timers, a 16-bit Programmable Counter Array (PCA) with five capture/compare modules, hardware-enhanced UART, SMBus, and SPI interfaces. It operates within a supply voltage range of 2.7 V to 3.6 V and supports temperatures from –40 °C to +85 °C.

Feature Summary

• High-performance pipelined 8051 architecture executing most instructions in one or two system clocks
• Integrated on-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators
• Programmable digital crossbar allows flexible mapping of peripheral signals to GPIO pins
• All port I/O pins are 5 V tolerant with high sink current capability

Applications

• Industrial control systems requiring robust communication interfaces
• Portable battery-powered instruments utilizing low-power stop modes
• Data acquisition systems leveraging internal comparators and timers
• Embedded applications needing in-circuit reprogrammable flash for field upgrades

Procurement Notes

Verify the specific package variant, as the C8051F314 is available in a 32-pin LQFP. Confirm that the application design accommodates the specified 2.7 V to 3.6 V supply voltage range. Ensure development tools support the C2 interface for programming and debugging. Check for any end-of-life notifications or recommended alternative parts from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when a balance of processing speed and analog integration is required in a compact form factor. The C8051F314 is suitable for designs needing multiple serial communication protocols and precise timing control via the PCA. Consider this part if 5 V tolerant I/O is necessary for interfacing with legacy logic levels while maintaining a low-voltage core operation.

Part Context

The C8051F314 belongs to the C8051F31x series of 8/16 kB ISP Flash MCUs. This family shares a common core and peripheral set, differing primarily in memory size and package options. The C8051F314 specifically provides 8 kB of Flash, distinguishing it from the 16 kB variants like the C8051F310. It utilizes the same CIP-51 core and peripheral configuration as other members of the F31x family.

Replacement Considerations

Direct pin-compatible replacements within the same family include the C8051F310, C8051F311, C8051F312, C8051F313, C8051F315, C8051F316, and C8051F317. These alternatives offer varying Flash capacities or package types but maintain code compatibility.