C8051T320-GQR

Overview

The C8051T320-GQR is an 8-bit microcontroller from Silicon Labs, part of the C8051T32x family. It features a high-speed CIP-51 core operating at up to 48 MHz with 48 MIPS throughput. The device integrates 64 kB of byte-programmable EPROM and up to 3328 bytes of internal data RAM. Key peripherals include a full-speed USB 2.0 function controller with integrated transceiver and clock recovery, a 10-bit ADC supporting up to 500 ksps, two comparators, four 16-bit timers, and a programmable counter array. Communication interfaces comprise two UARTs, SPI, and SMBus. It operates on a supply voltage of 1.8 V to 5.25 V within a temperature range of -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 components.
• Features a pipelined CIP-51 microcontroller core capable of executing most instructions in one or two system clocks for high performance.
• Includes a 10-bit analog-to-digital converter with a sampling rate up to 500 ksps and multiple configurable analog comparators.
• Provides flexible digital I/O configuration via a priority crossbar decoder and supports non-intrusive on-chip debugging through the C2 interface.

Applications

• USB-enabled embedded systems requiring direct connectivity without external PHY components
• Data acquisition applications utilizing the high-speed ADC and onboard temperature sensor
• Industrial control devices operating across wide voltage and temperature ranges

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm package type matches the required footprint, as options include QFN and LQFP variants. Ensure the specific suffix corresponds to the desired tape-and-reel packaging configuration. Cross-reference ordering codes with current Silicon Labs documentation to confirm availability status.

Selection Notes

Select this component when a fully integrated USB solution is required alongside mixed-signal capabilities. The EPROM memory allows for in-application programming, which benefits firmware update scenarios. Consider the available GPIO count and peripheral set against project requirements. Evaluate power consumption profiles across different clock speeds and sleep modes for battery-operated designs.

Part Context

This device belongs to the C8051T32x series of mixed-signal microcontrollers. It shares architectural similarities with the C8051T62x family but differs in memory type and specific peripheral configurations. The CIP-51 core ensures compatibility with standard 8051 development tools while offering enhanced instruction execution speeds compared to traditional architectures.

Replacement Considerations

Consult the official datasheet for confirmed substitute part numbers within the same family. Verify pinout compatibility and electrical characteristics before substituting. Check for any differences in memory technology or peripheral availability between potential replacements.

FAQ

Does the C8051T320 require external components for USB operation?

No, the device includes an integrated USB transceiver and on-chip clock recovery, removing the need for external resistors, crystals, or voltage regulators for USB functionality.

What is the maximum sampling rate of the ADC?

The 10-bit ADC supports a maximum sampling rate of 500 ksps.

How is the device programmed?

The device features 64 kB of byte-programmable EPROM that can be programmed via the C2 interface or through in-application programming using firmware running on the device.