PI3EUSB1101GHEX

Signal Buffers, Repeaters, Splitters Overview

The PI3EUSB1101GHEX is an eUSB2 repeater manufactured by Diodes Incorporated, designed to bridge legacy USB 2.0 systems with lower voltage SoCs. It complies with the Embedded USB 2.0 Physical Layer Specification Rev. 1.2 and supports data rates up to 480 Mb/s. The device operates on dual power supplies: VDD_3P0 (3.0V to 3.6V) for USB 2.0 analog circuitry and VDD_1P8 (1.71V to 1.89V) for eUSB2 analog circuitry. It features a 12-ball WLCSP package (GH) measuring 1.65mm x 1.22mm x 0.35mm. Electrical characteristics include low skew outputs of less than 80ps, ESD protection of +/-8kV HBM, and typical active power consumption of 87mW during high-speed communication.

Signal Buffers, Repeaters, Splitters Feature Summary

• Supports bidirectional conversion between eUSB2 and USB 2.0 protocols with integrated speed detection and negotiation capabilities.
• Includes configurable pull-up and pull-down resistors on both ports, along with bus-keeper functions for reliable auto-resume signaling.
• Provides comprehensive analog trimming for transmitter amplitude, equalization, drive strength, and receiver sensitivity tuning via I2C interface.
• Integrates reverse-current protection on USB 2.0 pins to safeguard against over-voltage conditions and short circuits.

Signal Buffers, Repeaters, Splitters Applications

• Connecting embedded USB 2.0 peripherals to standard USB 2.0 host controllers
• Interface bridging in mobile devices and IoT modules requiring protocol translation
• System-on-Chip designs utilizing modern process geometries with legacy USB connectivity

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm that the ordering suffix matches the required packaging configuration. Ensure compliance with RoHS and halogen-free standards as specified in the datasheet. Cross-reference the document revision number to guarantee access to the most current electrical specifications and pinout definitions.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when interfacing 1.2V eUSB2 PHYs with 3.3V USB 2.0 buses. Evaluate power supply requirements carefully, as the device necessitates distinct 1.8V and 3.3V rails. Consider the WLCSP package constraints for PCB layout and thermal management. Verify that the I2C address configuration meets system addressing requirements before finalizing the design.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the PI3EUSB series of signal buffers and repeaters from Diodes Incorporated. It specifically addresses the need for protocol translation between embedded and standard USB interfaces. The GHEX suffix indicates a lead-free, green, tape-and-reel packaged version of the PI3EUSB1101GHE core device.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The datasheet explicitly identifies the PI3EUSB1101S as the recommended replacement for new designs. Verify pin compatibility and electrical parameters before substituting other generic USB repeaters.

Signal Buffers, Repeaters, Splitters FAQ

How does the device handle auto-resume signaling?

The PI3EUSB1101GHEX employs bus keepers to actively drive the D+/D- lines in the K state after a peripheral stops driving them. This ensures the host detects the wake-up signal correctly before resuming normal transmission.

What is the function of the RST_N pin?

RST_N is an active-low reset input with an internal 20k pull-up to 1.8V. When tied low, it disables the internal resistor and forces the device into a reset state, holding the USB 2.0 D+/D- lines in a high-impedance state.

Can the device operate without I2C control?

Yes, the device defaults to standard operation modes upon power-up. However, I2C access allows for configuring analog trimming, EQ settings, and specific mode controls like deep standby or bus keeper activation.