EVB-USB82514Q36-BAS 36-Pin QFN Evaluation Board User Manual (Revision C)
Revision 1.1 (07-13-11) 4 SMSC EVB-USB82514Q36-BAS
USER MANUAL
2.1.6 Connector Description
The EVB-USB82514Q36-BAS has a set of standard USB style connectors:
One of type B for the upstream port
Four of type A for downstream ports
Power is supplied via a 2.0 mm power jack. Table 2.1, "Connector Description" lists all of the
connectors. For more details on the pinout of these connectors, please refer to the EVB-
USB82514Q36-BAS schematics on our web site: http://www.smsc-ais.com
.
2.1.7 Layout Considerations
The EVB-USB82514Q36-BAS is designed on four PCB layers−−two signal layers and two supply
layers. The PCB layer stackup is shown in Table 2.2. All signals are routed on top and bottom layers.
Internal layers are ground and power. Note that the differential signals from the USB82514 match the
upstream and downstream port placement simplifying routing of critical signals.
Component side top layer is shown in Figure 2.1 with silk screen information to identify component
locations.
Table 2.1 Connector Description
CONNECTOR TYPE DESCRIPTION
J1 USB A Downstream USB Port 1
J2 USB A Downstream USB Port 2
J3 USB A Downstream USB Port 3
J4 USB A Downstream USB Port 4
J5 USB B Upstream USB Port 0
J6 Power Jack 2.0 mm +5.0 VDC Power Supply
Table 2.2 PCB Layer Stack
Component Side
Solder mask
Layer 1 1.9 - 2.8 mil, finished
Pre-preg 4.25 mil, +/- 0.25 mil FR-4
Layer 2 -- GND 1.3 mil (nominal)
Core ~24 mil FR-4
Layer 3 -- POWER 1.3 mil (nominal)
Pre-preg 4.25 mil, +/- 0.25 mil FR-4
Layer 4 1.9 - 2.8 mil, finished
Solder mask
Solder Side
