C8051F320

Overview

The C8051F320R is an 8-bit microcontroller from the Silicon Labs C8051F32x family, housed in a 32-LQFP (7x7) package. It features a high-speed 8051 core operating at up to 25 MHz with 16 KB of ISP FLASH and 2.25 KB of RAM. The device integrates a full-speed USB 2.0 controller compliant with specification 2.0, supporting eight flexible endpoints and a 1 KB USB buffer. Analog peripherals include a 10-bit ADC with conversion rates up to 200 ksps, two comparators, and a built-in temperature sensor. Digital interfaces encompass SPI, UART, and SMBus. The unit operates within a voltage range of 2.7V to 3.6V for the core and supports a temperature range of -40°C to +85°C.

Feature Summary

• Integrated full-speed USB 2.0 controller with internal clock recovery and transceiver
• High-performance pipelined 8051 core delivering up to 25 MIPS throughput
• On-chip debug circuitry enabling non-intrusive in-system debugging without external emulators
• Mixed-signal architecture combining 10-bit ADC, comparators, and multiple digital serial ports

Applications

• USB-based data acquisition and storage systems
• Industrial sensor monitoring and control
• Medical device signal processing
• PC peripheral communication interfaces

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status as indicated in official documentation, noting potential variations based on production date. Ensure the specific package variant matches design requirements. Review the latest datasheet revision for any updates to electrical characteristics or pin definitions prior to finalizing procurement orders.

Selection Notes

Select this model when a fully integrated USB interface is required alongside mixed-signal capabilities. The internal oscillator accuracy supports USB timing without external crystals. Consider the 32-pin LQFP package for surface-mount assembly constraints. Evaluate the 16 KB program memory against application code size requirements. Verify that the 2.7V to 3.6V supply range aligns with system power architecture.

Part Context

This component belongs to the C8051F32x series of mixed-signal ISP FLASH microcontrollers. It shares architectural similarities with the C8051F321, which utilizes a 28-pin MLP package. Both devices feature identical core specifications but differ in I/O count and physical footprint. The series is designed for applications requiring high integration of analog and digital functions within a compact form factor.

Replacement Considerations

Public confirmed substitute part numbers: C8051F321.