ISP1521 is a USB hub controller IC from ISP that supports high, full, and low speed transmission.
The ISP1521 is a stand‑alone USB hub controller IC that complies with USB Specification Rev. 2.0. It supports high‑speed (480 Mbit/s), full‑speed (12 Mbit/s) and low‑speed (1.5 Mbit/s) data transfers and can operate as either a Hi‑Speed or Full‑Speed hub depending on the upstream host.
The device offers seven downstream ports, configurable over‑current protection (analog or digital), built‑in status LEDs, and is supplied in an LQFP‑80 package. It is intended for self‑powered hub designs such as monitor hubs, docking stations, motherboard hubs, and Easy PC extensions.
| Data transfer speeds | High‑speed 480 Mbit/s, Full‑speed 12 Mbit/s, Low‑speed 1.5 Mbit/s |
|---|---|
| Number of downstream ports | 7 |
| Package type | LQFP‑80, 80 leads |
| Operating temperature range | -40 °C to +70 °C |
| Self‑powered capability | Yes |
| Over‑current detection | Built‑in analog circuit, optional digital mode via external signal |
It supports high‑speed (480 Mbit/s), full‑speed (12 Mbit/s) and low‑speed (1.5 Mbit/s) USB transfers.
The ISP1521 provides seven downstream facing ports.
Yes, it has a built‑in analog over‑current detection circuit and can also accept digital over‑current signals from external circuitry.
It is offered in an LQFP‑80 (80‑lead) plastic low‑profile quad flat package.