Introduction
With industrial and OEM applications increasingly adding USB devices, the need for more USB ports becomes a
necessity. The HUB4PH is a powered USB 2.0 4-port hub that is perfect for adding high-speed USB ports to
industrial computing platforms.
The HUB4PH adds support for the USB 2.0 Battery Charging Specification version BC1.2 by the addition of a single
Charging Downstream Port (CDP). The remaining three ports are Standard Downstream Ports (SDP).
USB 2.0 Standard Downstream Port (SDP)
An SDP is a traditional USB 2.0 port that provides for data communications as well as a minimum of 500mA of
power. The host controller must be active to allow charging and the attached device will charge at a slower rate
due to the limited power available.
USB 2.0 Charging Downstream Port (CDP)
A CDP is a USB 2.0 port that provides for data communications and has the enhanced capability to provide up to
1.5A to the attached downstream device. For devices compatible with the USB Battery Charging BC1.2
specification a handshaking process occurs during attachment that allows the device to determine the amount
of power available. Once a CDP port is detected the device is then aware that extra power is available and can be
used to charge the device faster and at a higher rate.
The HUB4PH is USB 2.0 compliant, providing a full 480M bps data rate to the host, and is backwards compatible
with USB 1.1 and 1.0 devices. Additionally, port one is configured as a USB Battery Charging Specification BC1.2
Compliant Charging Downstream Port (CDP) supplying up to 1.5A of current. The powered hub includes a wall-
mount AC adapter that supplies 1.5A to port 1 and a full 500mA to ports 2 through 4. The hub is housed in a
rugged plastic enclosure and a status LED indicates proper connection to the host.
Additionally, the HUB4PH-KT and HUB4PH-OEM versions both include a power cable that sources +5VDC power
from a standard hard drive connector. For the –KT and –OEM versions all four ports are configured as USB Battery
Charging Specification BC1.2 Compliant Charging Downstream Ports (CDP) and supplies a full 1.5A to each
attached USB peripheral. The standard operating temperature range is 0°C to 70°C and extended temperature
range (-40°C to +85°C) is optional.