ISP1122A is a stand-alone Universal Serial Bus (USB) hub device which complies with USB Specification Rev. 1.1. It integrates a Serial Interface Engine (SIE), hub repeater, hub controller, USB data transceivers and a 3.3 V voltage regulator.
The ISP1122A is a stand‑alone USB hub that integrates a Serial Interface Engine, hub repeater, controller, data transceivers and a 3.3 V regulator. It supports 2 to 5 configurable downstream ports and can operate in bus‑powered, self‑powered or hybrid‑powered modes.
Key features include individual and global over‑current protection, GoodLink LED status indicators, an I²C‑bus interface for external EEPROM access, a 6 MHz crystal oscillator with on‑chip PLL, and 8 kV in‑circuit ESD protection. The device is offered in SO32, SDIP32 and LQFP32 packages.
| Power modes | Bus‑powered, self‑powered, hybrid‑powered |
|---|---|
| Operating temperature | -40 °C to +85 °C |
| ESD protection | 8 kV in‑circuit |
| Package options | SO32, SDIP32, LQFP32 (32‑pin) |
Each downstream port can draw up to 500 mA when the hub is self‑powered.
A 6 MHz crystal oscillator is integrated on the device.