USB3280-AEZG

Specialized Overview

The USB3280-AEZG is a Hi-Speed USB Device PHY with a UTMI interface, manufactured by Microchip Technology. It supports 480Mbps Hi-Speed and 12Mbps Full Speed data transmission rates compliant with the USB 2.0 specification. The device operates on a single +3.3V supply voltage, utilizing an internal 1.8V regulator. It features an 8-bit bidirectional parallel interface running at a 60MHz system clock (CLKOUT). Key electrical characteristics include a typical unconfigured current of 55mA and a suspend current of 83uA. The component is housed in a 36-pin QFN package measuring 6 x 6 x 0.90mm and supports an industrial operating temperature range from -40°C to +85°C.

Specialized Feature Summary

• Complies with the UTMI specification using an 8-bit bidirectional parallel interface for high-speed data transfer.
• Integrates internal termination resistors and short circuit protection to minimize external component requirements.
• Features an on-chip oscillator compatible with low-cost 24MHz crystals for system clocking.
• Provides robust ESD protection levels of 5kV HBM without requiring external protection devices.

Specialized Applications

• Cell Phones
• MP3 Players
• Scanners
• External Hard Drives
• Digital Still and Video Cameras

Specialized Procurement Notes

Verify that the ordering suffix matches the specific package variant required for your design. Confirm compliance with RoHS standards as indicated by the 'G' suffix. Ensure the source documentation corresponds to the latest datasheet revision DS00001898A to account for any silicon errata or operational updates before finalizing procurement specifications.

Specialized Selection Notes

Select this component when a dedicated physical layer transceiver is needed for a UTMI-compatible USB 2.0 device controller. It is suitable for bus-powered applications due to its low power consumption profiles. Consider the 36-pin QFN footprint constraints and verify that the host ASIC or FPGA can support the required 8-bit parallel data interface timing relative to the 60MHz CLKOUT signal.

Specialized Part Context

The USB3280 serves as a companion IC for ASICs, SoCs, or FPGAs implementing a UTMI Hi-Speed USB device core. It bridges the digital logic of the controller to the analog USB bus, handling serialization, encoding, and signal driving. This role allows the main processor to focus on protocol management while the PHY manages electrical signaling integrity and compliance.

Specialized Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Microchip's official compatibility matrices or contact technical support directly to identify qualified replacements or pin-compatible alternatives for existing designs.

Specialized FAQ

What type of crystal is required for the USB3280-AEZG?

The device requires an external 24MHz crystal connected between the XI and XO pins to drive the internal PLL and generate the necessary system clocks.

How does the USB3280 handle power supply requirements?

It operates from a single +3.3V supply. An internal regulator generates the 1.8V core voltage, though external 1.8V supplies can be used if the REG_EN pin is grounded to disable the internal regulators.

What is the function of the SUSPENDN pin?

Asserting SUSPENDN Low places the transceiver into a low-power suspend mode, shutting down non-essential blocks to draw minimal current, which is ideal for battery-powered applications.