USB3250-ABZJ

Specialized Overview

The USB3250-ABZJ is a USB 2.0 physical layer transceiver (PHY) integrated circuit manufactured by Microchip Technology, designed to interface with USB 2.0 device controllers. It supports High Speed (480 Mbps) and Full Speed (12 Mbps) data transmission rates compliant with the USB 2.0 specification. The device features a UTMI-compliant parallel interface available in either an 8-bit unidirectional or 16-bit bidirectional configuration. Key electrical parameters include a 3.0V to 3.6V supply voltage range for VDD3.3 and a 1.6V to 2.0V range for VDD1.8. It operates within an ambient temperature range of -40°C to +85°C and is housed in a 56-pin VQFN package.

Specialized Feature Summary

• Complies with the USB Transceiver Macrocell Interface (UTMI) specification, supporting both 60MHz 8-bit unidirectional and 30MHz 16-bit bidirectional interfaces.
• Integrates internal 45Ω and 1.5kΩ termination resistors along with on-chip decoupling capacitance to reduce external component count and improve noise immunity.
• Includes robust digital clock and data recovery circuits, NRZI encoding/decoding, bit stuffing/unstuffing, and internal short-circuit protection for DP and DM lines.
• Operates with a low-cost 12MHz crystal oscillator and supports all USB 2.0 test modes, including suspend state management and Hi-Speed detection.

Specialized Applications

• Digital Still and Video Cameras
• External Hard Drives
• MP3 Players
• Scanners
• POS Terminals

Specialized Procurement Notes

Verify the specific suffix ABZJ against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure that the ordering information matches the exact part number required for your design specifications. Cross-reference the document revision history for any errata sheets that may apply to this silicon revision before finalizing procurement.

Specialized Selection Notes

Select the USB3250-ABZJ when a UTMI-compatible PHY is required for bus-powered USB 2.0 peripherals due to its low power consumption profile. Consider the 56-pin VQFN package constraints and the need for an external 12MHz crystal. Evaluate the system's requirement for either 8-bit or 16-bit data bus widths to determine appropriate interface configuration during the design phase.

Specialized Part Context

The USB3250 series consists of Hi-Speed USB Device Transceivers with UTMI interfaces. This component belongs to Microchip's portfolio of USB interface integrated circuits designed for connecting high-speed PC peripherals. It serves as the physical layer bridge between the USB host/controller logic and the physical USB cable connections.

Specialized Replacement Considerations

Consult the manufacturer's official documentation for confirmed substitute part numbers. Verify pin compatibility and electrical characteristics if considering alternative vendors. No public cross-reference data is provided here; direct verification with Microchip Technology is required for valid replacements.

Specialized FAQ

What are the supported data interface modes for the USB3250?

The USB3250 supports two modes: an 8-bit unidirectional mode operating at 60MHz CLKOUT, and a 16-bit bidirectional mode operating at 30MHz CLKOUT. The mode is selected via the DATABUS16_8 signal.

How is the system clock generated for the USB3250?

The device uses an internal PLL and XTAL oscillator block that connects to an external 12MHz crystal connected between the XI and XO pins. This generates the necessary multi-phase clocks for USB signaling.

What internal protections does the USB3250 provide?

The IC includes internal short-circuit protection for the DP and DM lines, internal 45Ω and 1.5kΩ termination resistors, and on-die decoupling capacitance to provide immunity to digital switching noise.