Date: 14/12/2009

USB host charger identification analog switch for notebook/netbook apps

Maxim has introduced the MAX14550E, a new high-speed USB analog switch with a USB host-charger identification circuit to automatically detect portable devices. The MAX14550E device allows a host to charge portable devices even when the host is in standby and cannot enumerate USB devices, and suitable for mobile, notebook and netbook applications.

The MAX14550E features two digital inputs (CB0 and CB1) to switch between pass-through and charger modes. The USB host charger identification circuit allows a host USB port to support USB chargers with shorted D+/D- detection and to provide support for Apple-compliant devices using a resistor bias. When an Apple-compliant device is attached to the port, the MAX14550E provides the voltage from the external divider. If a USB Revision 1.0-compliant device is attached, the MAX14550E connects a short across DP and DM to allow correct charger detection. The MAX14550E auto-detection circuit can be disabled and either a DP/DM short or resistor network is chosen as the default.

The other key features of the MAX14550E USB analog switch are,

USB 2.0 high-speed switching
Low 0.1Ohm on-resistance flatness
Operating input voltage ranges from +2.8V to +5.5V
7µA of low supply current
Optional external resistor-divider with auto selection
±15kV high ESD HBM protection on DP/DM
Integrating this functionality within a single IC eliminates the need for multiple discrete components and minimizes software overhead

Operating temperature range: -40°C to +85°C

Package: 3mm x 3mm, 10-pin TDFN package
Price: Starts at $1.65 for 1k pieces
Availability: Now
For more details visit www.maxim-ic.com