Описание
The MAX14550 is a USB Hi-Speed analog switch with a USB host charger (dedicated charger) identification circuit. The MAX14550 supports both the USB Battery Charging Specification Revision 1.0 and a set resistor bias for AppleM-compliant devices. The MAX14550 features a high-performance Hi-Speed USB switch with low 4pF (typ) on-capacitance and low 4I (typ) on-resistance. In addition, the MAX14550 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 MAX14550 provides the voltage from the resistor-divider. The MAX14550 uses the internal or external resistor based on the voltage at RDP. If a USB Revision 1.0-compliant device is attached, the MAX14550 connects a short across DP and DM to allow correct charger detection. The MAX14550 autodetection circuit can be disabled and either a DP/DM short or resistor network is chosen as the default. The MAX14550 has enhanced high electrostatic discharge (ESD) protection on the DP and DM inputs up to Q15kV Human Body Model (HBM). The MAX14550 is available in a 10-pin (3mm x 3mm) TDFN package and is specified over the -40NC to +85NC extended temperature range.
- USB 2.0 Hi-Speed Switching
- Low 4.0pF On-Capacitance
- Low 4.0? On-Resistance
- Ultra-Low 0.1? On-Resistance Flatness
- +2.8V to +5.5V Supply Range
- Ultra-Low 7µA Supply Current
- Automatic USB Charger Identification Circuit
- Optional External Resistor-Divider with Auto Selection
- ±15kV High ESD HBM Protection on DP/DM
- 3mm x 3mm, 10-Pin TDFN Package
