Key facts
- Brand
- Philips
- Model
- ISP1122
- Category
- Other device
- Documents
- 2
- Languages
- EN
- Last added
- 2012-05-11
Start here
Philips ISP1122A USB Hub Preliminary Specification
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.
Philips ISP1122 specifications
| 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) |
All Philips ISP1122 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the maximum current per downstream port in self‑powered mode?
Each downstream port can draw up to 500 mA when the hub is self‑powered.
What crystal oscillator frequency is used?
A 6 MHz crystal oscillator is integrated on the device.
What power modes does the ISP1122 support?
It can operate bus‑powered, self‑powered, or hybrid‑powered.
How does the GoodLink indicator work?
GoodLink provides visual USB traffic monitoring via an LED that blinks during activity and stays on when the connection is good.