EVB-USB2517 Evaluation Board User Manual (Revision A)

Revision 1.2 (1-7-09)

4

SMSC EVB-USB2517 Revision A

USER MANUAL

2.1.6

Connector Description

The EVB-USB2517 has a set of standard USB style connectors:

One type B connector for the upstream port

Seven type A connectors for downstream ports

Power is supplied via a 2.0 mm power jack. Please refer to Table 2.1 for a list of the connectors. For

more details on the pinout of the connectors please refer to the schematics in Figure 2.1 and

Figure 2.2.

2.1.7

Layout Considerations

The EVB-USB2517 is a low-power, hi-speed USB 2.0 compliant hub on four PCB layers. Please refer

to Table 2.2 for a list of the PCB layer stackup. Differential signals from the USB2517 match the

upstream and downstream port placement to simplify the routing of critical signals.

The top layer of the component side is shown in Figure 2.1. The schematic includes silk screen

information to identify component locations.

Table 2.1 Connector Descriptions

CONNECTOR

TYPE

DESCRIPTION

J0

USB B

Upstream Port

J1

USB A

Downstream Port 1

J2

USB A

Downstream Port 2

J3

USB A

Downstream Port 3

J4

USB A

Downstream Port 4

J5

USB A

Downstream Port 5

J6

USB A

Downstream Port 6

J7

USB A

Downstream Port 7

J8

Power Jack 2.0 mm

+5 V Power Supply

Table 2.2 PCB Layer Stackup

COMPONENT SIDE

Solder mask

Layer 1

1.3 - 2.3 oz., finished

Pre-preg

4.0 - 4.5 mil FR-4

Layer 2

1.0 oz., nominal

Core

28 mil FR-4

Layer 3

1.0 oz., nominal

Pre-preg

4.0 - 4.5 mil FR-4

Layer 4

1.3 - 2.3 oz., finished

Solder mask

Solder Side