C8051F347-GQ

Overview

The C8051F347-GQ is an 8-bit microcontroller from the Silicon Labs C8051F34x family, featuring a high-speed 8051 core operating at 25 MIPS. It integrates 32 kB of Flash memory and 2.304 kB of RAM within a 32-pin LQFP package. The device includes a full-speed USB 2.0 function controller with an integrated transceiver and clock recovery. Analog peripherals consist of a 10-bit ADC supporting up to 200 ksps, two comparators, and a temperature sensor. It operates on a voltage supply of 2.7 V to 5.25 V and supports industrial temperatures from -40 °C to +85 °C.

Feature Summary

• Integrates a full-speed USB 2.0 function controller with an on-chip transceiver and clock recovery, eliminating the need for external crystals or resistors.
• Features a pipelined 8051 core executing instructions in one or two system clocks for enhanced processing performance.
• Includes a 10-bit analog-to-digital converter with built-in multiplexer, voltage reference options, and a temperature sensor.
• Provides non-intrusive on-chip debug capabilities allowing breakpoints and single-stepping without external emulation hardware.

Applications

• Embedded USB connectivity solutions
• Medical diagnostic equipment
• Point-of-sale terminals
• Voice over Internet Protocol telephones

Procurement Notes

Verify component status before procurement as this part is marked Not Recommended for New Designs. Confirm package type matches the LQFP-32 specification. Check for obsolescence notices or end-of-life notifications from Silicon Labs. Ensure design reviews account for the discontinued status when planning long-term production runs.

Selection Notes

Select this model for applications requiring 32 kB Flash and 25 MIPS processing speed within a compact 32-pin footprint. Choose this variant over higher-memory models if cost and pin count are primary constraints. Verify that the 10-bit ADC resolution meets signal acquisition requirements. Confirm compatibility with existing USB host software stacks designed for the C8051F34x family.

Part Context

This component belongs to the C8051F34x series of mixed-signal System-on-Chip microcontrollers. The series differentiates by varying Flash sizes (32 kB or 64 kB) and CPU speeds (25 MIPS or 48 MIPS). The C8051F347 specifically pairs the lower memory configuration with the standard 25 MHz core speed, distinguishing it from the 64 kB variants like the C8051F340.

Replacement Considerations

Public confirmed substitute part numbers: None available.