The ISP1123 is a USB 1.1 compliant compound Universal Serial Bus (USB) hub device. It integrates a Serial Interface Engine (SIE), hub repeater, hub controller, USB data transceivers and a 3.3 V voltage regulator.
The ISP1123 USB compound hub integrates a Serial Interface Engine, hub repeater, controller, data transceivers and a 3.3 V regulator. It complies with USB Specification Rev. 1.1 and can be configured for 2 to 5 downstream ports, with one port dedicated to a non‑removable function.
Key features include individual or ganged over‑current protection, GoodLink visual traffic monitoring, I²C‑bus access to an external EEPROM, and support for bus‑, self‑ and hybrid‑powered modes. The device is offered in SO32, SDIP32 and LQFP32 packages and operates from –40 °C to +85 °C.
| Regulated supply voltage | 3.3 V |
|---|---|
| Operating temperature range | -40 to +85 °C |
| Power modes supported | bus‑powered, self‑powered, hybrid‑powered |
| Available packages | SO32, SDIP32, LQFP32 |
The hub supports bus‑powered, self‑powered, and hybrid‑powered operation.
It operates from –40 °C to +85 °C.
The device is available in SO32, SDIP32 and LQFP32 packages.