USB375x
DS00001824A-page 4 2011 - 2014 Microchip Technology Inc.
1.0 INTRODUCTION
The USB375x integrates many features that have historically been discrete devices in a mobile product. This device
provides significant VBUS protection for the entire system, robust USB interface ESD protection, a USB 2.0 compliant
High Speed switch, and USB-IF Battery Charger Detection (revision 1.2) capabilities that are essential to the latest
mobile products.
Several advanced features allow the USB375x to be optimized for portable applications and to reduce both eBOM part
count and printed circuit board (PCB) area. Outstanding ESD robustness eliminates the need for external ESD protec-
tion devices.
In addition to the integrated ESD protection on the USB interface, the USB375x provides VBUS Over-Voltage Protection
(OVP).
The USB375x integrated battery charger detection circuitry supports USB-IF Battery Charger Detection. Battery charger
detection will begin automatically whenever VBUS rises above the UVLO threshold, and can also be completed manu-
ally through the I
2
C interface. The USB375x can detect a range of USB battery chargers including a Standard Down-
stream Port (SDP), a Charging Downstream Port (CDP), and a Dedicated Charging Port (DCP). For more information
on USB battery charger detection, please see the USB Battery Charging Specification, Revision 1.2 (Note 1).
The I
2
C interface gives processor control over the USB Switch, charger detection, OVLO settings, and status of the
USB375x. In addition, custom charger detection can be implemented through the I
2
C interface.
The USB375x family is enabled with Microchip's RapidCharge Anywhere
TM
which supports USB-IF Battery Charging
1.2 for any portable device (Note 1). RapidCharge Anywhere
TM
provides three times the charging current through a
USB port over traditional solutions which translate up to 1.5 amps via compatible USB host or dedicated charger. In
addition, this provides a complete USB charging ecosystem between device and host ports such as Dedicated Charging
Port (DCP), Charging (CDP) and Standard (SDP) Downstream Ports.
1.1 Reference Documents
• Universal Serial Bus Specification, Revision 2.0
• USB Battery Charging Specification, Revision 1.2 (Note 1)
Note 1: The device’s Data Contact Detect Timeout parameter does not conform to the USB Battery Charging Spec-
ification. However, this will not affect other factors in charger detection. Refer to Table 3-2, “Electrical Spec-
ifications,” on page 7 for additional information.
