2011 - 2015 Microchip Technology Inc. DS00001725D-page 7
USB3740B
4.0 GENERAL OPERATION
The USB3740B is a high bandwidth switch suitable for many applications, including High Speed USB. The mux allows
high speed signals to pass through and still meet HS USB signaling requirements.
The USB3740B will protect the system from ESD stress events on all DP and DM pins. The USB3740B provides ESD
protection to the IEC-61000 ESD specification.
The USB mux is designed to pass High Speed USB signals to the USB connector, and allows for two USB inputs to be
multiplexed into one USB output.
The USB Mux is designed to pass USB signals from 0 to VDD. It is not designed to pass signals that go above VDD or
below ground.
The USB3740B switches are controlled by the digital signals OE_N and S, as shown in Table 4-1.
TABLE 4-1: USB3740B SWITCH STATES DEFINITION
OE_N S Switch State
1 X STANDBY:
• Both switch paths disconnected.
• Lowest power state
0 0 DP = DP1, DM = DM1:
0 1 DP = DP2, DM = DM2:
