Diodes Incorporated PI5USB216XUAEX

Overview

PI5USB216XUAEX from Diodes Incorporated is a USB 2.0 High-Speed signal conditioner IC that compensates inter-symbol interference (ISI) via symmetrical boost and pre-emphasis on D+/D−, supports up to 10 m total cable length with dual-stage deployment, operates from 2.3 V to 5.5 V, and integrates BC 1.2 CDP charging control for host-side battery charging in servers and storage systems.

For engineers reviewing the PI5USB216XUAEX datasheet, PI5USB216XUAEX pinout, PI5USB216XUAEX application, or PI5USB216XUAEX equivalent, key selection criteria include HS signal integrity restoration capability, programmable boost/pre-emphasis levels (4 settings), receiver sensitivity configuration (3 levels), I²C or pin-mode control flexibility, and integrated CDP_ENZ-controlled BC 1.2 charging functionality.

Technical Context

The PI5USB216XUAEX implements a passive-signal-boosting architecture with active pre-emphasis injection to counteract high-frequency loss in long PCB traces or cables. It maintains stable common-mode voltage through matched D+/D− path symmetry and does not alter LS/FS/OTG/BC signaling-only conditioning HS differential pairs at 480.24 Mbps.

Its dual operational modes-pin-strapped and I²C-configurable-enable dynamic adaptation: BOOST pin selects one of four boost/pre-emphasis levels (0–3), while SEN/HS pin sets three receiver sensitivity tiers during reset and later reports HS handshake status. The integrated BC 1.2 controller activates only when CDP_ENZ is pulled low.

Key Specifications

Pinout & Package

PI5USB216XUAEX is housed in a 12-pin X2QFN (XUA) package, 1.6 mm × 1.6 mm, 0.4 mm pitch, exposed thermal pad, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TI TUSB216 and ON Semi NB3N502, the PI5USB216XUAEX uniquely combines programmable boost/pre-emphasis, I²C configurability, integrated BC 1.2 CDP control, and HS handshake reporting-making it the only choice for industrial storage systems requiring both signal integrity and smart charging in a single chip.

Availability

PI5USB216XUAEX is available at Aetrix Electronics and suitable for server backplanes, JBOD/RBOD enclosures, industrial USB hubs, and embedded storage appliances requiring stable component supply, long-cable USB 2.0 reliability, and integrated BC 1.2 charging capability.

Supply support for PI5USB216XUAEX 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 is a global manufacturer of discrete semiconductors and integrated circuits, specializing in high-performance analog, logic, and timing solutions for industrial, computing, and communications markets.

The PI5USB216XUAEX belongs to Diodes' USB signal conditioning product line, designed specifically to solve high-speed signal integrity challenges in dense server, storage, and embedded systems where trace loss, connector degradation, and cable extension degrade USB 2.0 HS performance.

FAQ

What is the function of the SEN/HS pin?

The SEN/HS pin serves a dual role: during power-on reset, it acts as a 3-level input (VCC/floating/GND) to configure receiver sensitivity; after reset, it becomes an open-drain output asserting high upon successful USB 2.0 High-Speed handshake detection. This eliminates need for external monitoring circuitry.

Can PI5USB216XUAEX operate in both host and device roles?

Yes-PI5USB216XUAEX is explicitly host/device agnostic. It conditions only HS differential signals regardless of directionality and does not interfere with LS/FS/OTG/Battery Charging protocols. Its pinout and functional behavior remain identical whether placed upstream of a host PHY or downstream of a device PHY.

How does the BOOST pin determine pre-emphasis level?

The BOOST pin samples an external pulldown resistor value at reset to select one of four fixed boost/pre-emphasis configurations: Setting 0 (<160 Ω), Setting 1 (~1.8 kΩ), Setting 2 (~3.6 kΩ), or Setting 3 (>7.5 kΩ). Each setting corresponds to increasing amplitude boost and high-frequency pre-emphasis to match specific channel loss profiles.

Is I²C configuration mandatory for operation?

No-I²C configuration is optional. The device defaults to pin mode if SDA and SCL are not both pulled high at power-up. In pin mode, all settings (boost, sensitivity, CDP_ENZ) are determined by static pin states, enabling simple, firmware-free deployment in cost-sensitive or resource-constrained systems.