usb3740 evaluation board user manualww1.microchip.com/downloads/en/devicedoc/evb3740user.pdf ·...

USB3740 Evaluation Board User Manual

Copyright © 2012 SMSC or its subsidiaries. All rights reserved.

Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete informationsufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumedfor inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales officeto obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductordevices any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the termsand conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement").The product may contain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. Anomalysheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where productfailure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and furthertesting and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may beobtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered trademark of Standard Microsystems Corporation (“SMSC”). Product names andcompany names are the trademarks of their respective holders.

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SMSC USB3740 EVB USER MANUAL Revision 1.1 (12-07-12)


1 Introduction

The USB3740 EVB demonstrates the capabilities of the USB3740. The board consists of the upstreamand downstream ports, manual switches to control the OE_N and S pins, and a second USB3740 thatcan be evaluated with SMA connectors instead of USB (SMA connectors not installed).

2 Hardware

2.1 USB Ports

The USB ports are mounted on the edges of the USB3740 EVB. The downstream ports use thestandard USB Type A receptacle. The label for the port is located next to the receptacle. The upstreamport can be a standard USB Type B, mini-B or micro-B receptacle, the default connector is a USB mini-B connector.

2.2 Test Points and Resistors

The USB3740 EVB provides access to the OE_N, S, VDD and GND pins. TP2 connects to GND, TP1connects to the VDD pin. R1 (On the back of the PCB) connects the upstream VBUS to the VDD ofthe USB3740. R2 and R3 connect the upstream VBUS to the VBUS pins of the dowstream ports. SW1and SW2 control the operation of the switch. SW1 controls the Output Enable (OE_N) pin. To enablethe switch, OE_N should be set to 0. SW2 selects which downstream port is connected to the upstreamport.

Figure 2.1 Upstream and Downstream Ports

Upstream

Downstream1 Downstream2

SMSC USB3740 EVB 2 Revision 1.1 (12-07-12)USER MANUAL


2.3 SMA Evaluation (Not Installed)

The USB3740 EVB also contains a section to evaluate the USB3740 without the standard USBconnectors. Because the switch can be used in many different applications, a second USB3740 isplaced on the board with the pins routed out to right angle SMA connectors. The connectors are notpopulated by default. R5 is used to supply VDD to the second USB3740.

Figure 2.2 Test points, Resistors and Switches

Figure 2.3 USB3740 EVB with the SMAs populated

TP2

TP2SW1 SW2

R3

R2

R5



3 USB3740 EVB Schematic

Figure 3.1 USB3740 EVB Schematic

5 5

4 4

3 3

2 2

1 1

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min

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SMD

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S1

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-2

ID4

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D5

SHIE

LD1

6

SHIE

LD2

7

SHIE

LD3

8

SHIE

LD4

9

SW2

1

2

3

SW1

1

2

3

J4

1 2 3 4 5

J5

1 2 3 4 5

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ZER

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TP2

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4 USB3740 EVB Bill of Materials

Figure 4.1 USB3740 EVB Bill of Materials

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SB M

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131

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SMSC

Yes



5 Revision History

Table 5.1 Customer Revision History

REVISION LEVEL & DATE SECTION/FIGURE/ENTRY CORRECTION

Rev. 1.1(12-07-12)

Modified Section 2.2, Section 2.3.

Document co-branded: Microchip logo added, modification to legal disclaimer.

Rev. 1.0(12-09-11)

Initial Release


usb3740 evaluation board user manualww1.microchip.com/downloads/en/devicedoc/evb3740user.pdf ·...

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