Diodes Incorporated PI3USB102ZLEX

Overview

PI3USB102ZLEX from Diodes Incorporated (acquired Pericom) is a single-differential-channel 2:1 USB 2.0 high-speed (480 Mbps) analog multiplexer/demultiplexer switch with 4.0 Ω typical R_ON, 250 ps propagation delay, and –40 dB off-isolation at 480 Mbps. It routes bidirectional differential USB D+/D– signals between host and dual downstream ports in portable battery-powered devices.

For engineers reviewing the PI3USB102ZLEX datasheet, PI3USB102ZLEX pinout, PI3USB102ZLEX application, or PI3USB102ZLEX equivalent, key selection criteria include low bit-to-bit skew (<20 ps), ±7 V I/O overvoltage tolerance with external resistor, 300 MHz –0.5 dB bandwidth, and compatibility with USB 2.0 eye diagram compliance requirements.

Technical Context

This device implements a CMOS-based analog switch architecture optimized for high-speed differential signaling, supporting full- and high-speed USB 2.0 modes without signal attenuation or timing distortion. Its rail-to-rail logic inputs tolerate up to +3.6 V independent of V_DD, enabling direct interfacing with 1.8 V/3.3 V control logic.

The switch features integrated overvoltage protection on all I/O pins-capable of withstanding shorts to 5 V (±10%) or 7 V when paired with a 100 Ω or 200 Ω pull-up resistor between V_DD and supply-ensuring robustness in unpowered or hot-plug scenarios common in handheld USB peripherals.

Key Specifications

Pinout & Package

PI3USB102ZLEX is housed in a Pb-free, green 10-contact TQFN package (ZL10), measuring 1.3 mm × 1.6 mm × 0.75 mm, with wettable flank leads for automated optical inspection (AOI).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB 2.0 signal switching applications.

Compared with TS3USB30E and MAX14533, PI3USB102ZLEX delivers superior high-speed signal fidelity (300 MHz –0.5 dB BW, –40 dB isolation), wider V_DD range accommodating battery discharge, and integrated overvoltage resilience-making it optimal for portable USB switching where size, robustness, and spec-compliant performance are jointly critical.

Availability

PI3USB102ZLEX is available at Aetrix Electronics and suitable for smartphone USB switching, tablet docking interfaces, wireless earbud charging cases, and USB-powered IoT sensor hubs requiring stable component supply across extended production lifecycles.

Supply support for PI3USB102ZLEX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated acquired Pericom Semiconductor in 2017 and integrates its high-speed interface portfolio into broad mixed-signal solutions for consumer, computing, and industrial markets.

The PI3USB102 belongs to Pericom's legacy USB signal integrity switch product line, engineered specifically for low-latency, low-skew, overvoltage-resilient routing in battery-constrained portable USB 2.0 applications.

FAQ

What is the maximum V_bus voltage the PI3USB102ZLEX I/O pins can withstand?

The I/O pins tolerate shorts to 5 V (±10%) at all times, and up to 7 V when a 200 Ω pull-up resistor is placed between V_DD and the 3.3 V supply rail. This overvoltage protection remains active whether the device is powered or unpowered, provided the resistor is correctly implemented per datasheet Figure 1.

Does PI3USB102ZLEX require external ESD protection diodes?

No. The device integrates 8 kV contact ESD protection on all I/O pins per IEC 61000-4-2, eliminating the need for external TVS diodes in most USB 2.0 applications. However, system-level surge protection (e.g., for lightning-induced transients) may still be required depending on end-equipment safety standards.

Can PI3USB102ZLEX operate with a 1.8 V logic control interface?

Yes. Its SEL and OE inputs are rail-to-rail compatible and accept logic-high signals up to +3.6 V regardless of V_DD level. When V_DD = 2.7 V, a 1.8 V GPIO can reliably drive SEL/OE because the VIH threshold is only 1.6 V (min) at V_DD = 3.3 V and scales downward proportionally.

Is PI3USB102ZLEX pin-compatible with PI3USB102ZLE?

Yes. PI3USB102ZLEX is the tape-and-reel variant of PI3USB102ZLE (same ZL10 TQFN package, identical pinout, electrical specs, and marking "XD"). The "X" suffix denotes packaging format only; no functional or mechanical differences exist between the two orderables.