ISP1122 is a USB hub device from ISP company, supports 2 to 5 downstream ports, has low power consumption and can be powered by bus, self-powered or hybrid-powered
The ISP1122 is a stand‑alone USB hub that complies with USB Specification Rev. 1.1. It integrates a Serial Interface Engine, hub repeater, controller, USB transceivers and a 3.3 V regulator. The number of downstream ports can be configured between 2 and 5, and the hub can operate bus‑powered, self‑powered or hybrid‑powered.
All ports feature GoodLink™ LED indicators for visual USB traffic monitoring. The device includes built‑in overcurrent sense inputs for both individual and global protection, a 6 MHz crystal oscillator with on‑chip PLL, and an I²C interface for external EEPROM configuration.
| Operating temperature | -40 to +85 °C |
|---|---|
| Internal regulator voltage | 3.3 V |
| Crystal oscillator frequency | 6 MHz |
| Power modes | Bus‑powered, self‑powered, hybrid‑powered |
| Overcurrent protection | Individual and global |
| Maximum bus‑powered port current | 100 mA |
| Maximum self‑powered port current | 500 mA |
It can operate bus‑powered, self‑powered, or hybrid‑powered.
GoodLink provides visual USB traffic monitoring via an LED that blinks during activity and stays on when the connection is good.
The hub includes built‑in sense inputs for both individual and global overcurrent protection.