USB3503A-1-GL-TR

USB3503A-1-GL-TR is a USB 3.0 hub controller IC from Genesys Logic (GL family). It provides an upstream USB 3.0 (SuperSpeed) port to a host and multiple downstream ports to connect USB devices, implementing the hub functionality (enumeration, bandwidth sharing, etc.). It handles port power switching, over‑current protection, interrupt handling, and basic LED/power management, and supports USB 3.0 with USB 2.0/1.x compatibility. The -GL suffix indicates a particular vendor/variant, and -TR denotes tape‑and‑reel packaging (RoHS-compliant). Used to build USB hubs in PCs, laptops, docking stations, and embedded systems. For exact port count, power specs, timing, and interface details, consult the USB3503A datasheet and application notes.

Direct exact equivalents aren’t publicly listed. Closest substitutes are other USB 3.0 hub controllers from the same ecosystem, e.g., Genesys Logic family parts such as GL3520 / GL3523 / GL3530 (depending on port count and features). Some vendors also list VIA Labs VL805/VL811 as alternatives. For an exact cross-reference, use distributor cross-reference tools (Digi-Key/Mouser) or contact the manufacturer.

USB3503A-1-GL-TR features (typical for this Genesys Logic 4-port hub controller):
- Four downstream USB 2.0 Hi-Speed ports (480 Mbps) with an upstream USB port to the host
- USB 2.0 compliant hub (EHCI/OHCI compatible)
- Supports both bus-powered and self-powered operation (external 5V supply)
- Independent per-port power switching with over-current protection
- Port enable/disable control and fault reporting
- Suspend, resume, and remote wakeup support
- Low-power modes and dynamic power management
- Standard USB enumeration and operation without requiring external microcontroller
- Packaging: GL family device in Tape & Reel (TR)
Note: exact capabilities can vary by revision and config. For precise specs and pinout, consult the official USB3503A-1-GL-TR datasheet.

Pin count: 28 pins (QFN-28 package). Function: USB3503A-1-GL-TR is a USB 2.0 hub controller from Genesys Logic with one upstream port and three downstream ports (4-port hub). It handles hub control, port power switching, and USB enumeration, operating at USB 2.0/high-speed (480 Mbps). The -GL indicates Genesys Logic, and -TR denotes Tape & Reel packaging.

Manufacturer: Genesys Logic, Inc.
What kind of company: A fabless semiconductor company that designs USB controller ICs (USB 2.0/3.0 hub/controllers and other connectivity ICs) for OEMs and electronics manufacturers.

Typical application areas for USB3503A-1-GL-TR:
- USB 3.0 hub expansion for computers, laptops, and single-board computers (docking stations, hubs, card readers)
- Embedded systems and consumer electronics requiring multiple downstream USB ports
- Automotive infotainment and telematics devices needing high-speed USB connectivity
- Industrial automation and ruggedized equipment with reliable USB peripherals
- Point-of-sale, digital signage, medical devices, and data-collection peripherals
- External storage enclosures and other high‑data-rate USB peripherals (HDD/SSD, cameras)
Note: Used as a USB 3.0 hub controller to add multiple downstream USB connections.

TR = Tape‑and‑Reel packaging. GL = Green/lead‑free variant. USB3503A-1-GL-TR is a Green (lead‑free) device in a QFN package, shipped in Tape‑and‑Reel.