C8051F321-GM

Overview

The C8051F321-GM is a Silicon Labs 8-bit microcontroller featuring a high-speed 8051 core operating at up to 25 MIPS with a 25 MHz clock. It integrates a full-speed USB 2.0 function controller with an integrated transceiver and on-chip clock recovery, eliminating the need for external components. The device includes 16 kB of ISP Flash memory and 2304 bytes of internal RAM. Analog peripherals consist of a 10-bit ADC supporting up to 200 ksps, two comparators, and a temperature sensor. It operates within a voltage range of 2.7 V to 5.25 V and supports temperatures from -40 °C to +85 °C in a 28-pin QFN package.

Feature Summary

• Integrated full-speed USB 2.0 function controller with built-in transceiver and clock recovery
• High-performance pipelined 8051 CPU core delivering up to 25 MIPS throughput
• On-chip analog subsystem including a 10-bit ADC, dual comparators, and temperature sensor
• Non-volatile 16 kB Flash memory allowing in-system programming

Applications

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

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm that the specific ordering suffix matches the required package type and temperature rating. Review the datasheet revision history for any updates regarding electrical characteristics or pin definitions prior to finalizing procurement orders.

Selection Notes

Select this component for designs requiring direct USB integration without external PHYs. Ensure the application fits within the 16 kB Flash and 2304 byte RAM constraints. Verify that the 28-pin QFN footprint aligns with the PCB layout requirements and thermal management strategy for the target environment.

Part Context

This part belongs to the C8051F32x/34x family of USB microcontrollers from Silicon Labs. These devices are designed to provide single-chip solutions for embedded USB applications by combining a standard 8051 architecture with robust analog and digital peripherals. The family utilizes the C2 interface for debugging and programming.

Replacement Considerations

Public confirmed substitute part numbers: C8051F320-GM.