EVB-USB3740 - Development board Microchip - Free user manual and instructions

USER MANUAL EVB-USB3740 Microchip

USB3740 Evaluation Board User Manual

Close-up of a Raspberry Pi circuit board with labeled components and gold contacts (no readable text or symbols beyond part labels)

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1 Introduction

The USB3740 EVB demonstrates the capabilities of the USB3740. The board consists of the upstream and downstream ports, manual switches to control the OE_N and S pins, and a second USB3740 that can 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 the standard USB Type A receptacle. The label for the port is located next to the receptacle. The upstream port can be a standard USB Type B, mini-B or micro-B receptacle, the default connector is a USB mini-B connector.

Upstream Downstream1 PORT1 USB3740 R3 P1 P3 R2 R4 P4 U1 SW1 C1 PORT2 J1 1-OF N=0 2-PORT-1 GND Upstream Downstream2

Figure 2.1 Upstream and Downstream Ports

2.2 Test Points and Resistors

The USB3740 EVB provides access to the OE_N, S, VDD and GND pins. TP2 connects to GND, TP1 connects to the VDD pin. R1 (On the back of the PCB) connects the upstream VBUS to the VDD of the USB3740. R2 and R3 connect the upstream VBUS to the VBUS pins of the downstream ports. SW1 and SW2 control the operation of the switch. SW1 controls the Output Enable (OE_N) pin. To enable the switch, OE_N should be set to 0. SW2 selects which downstream port is connected to the upstream port.

R2 R2 P1 R3 PORT1 USB3740 R3 U1 P4 PORT2 TP2 SW1 SW2 J1 1-OF N-0 2-PORT-1 TP2

Figure 2.2 Test points, Resistors and Switches

2.3 SMA Evaluation (Not Installed)

The USB3740 EVB also contains a section to evaluate the USB3740 without the standard USB connectors. Because the switch can be used in many different applications, a second USB3740 is placed on the board with the pins routed out to right angle SMA connectors. The connectors are not populated by default. R5 is used to supply VDD to the second USB3740.

R2 P1 P2 PORT1 USB3740 R3 TP1 VDD U1 SW1 C1 P4 PORT2 SW2 TP2 GND J1 R5 1- OE N-0 2- PORT-1 J5 R5 C3 DP2 DM2 U2 DP1 DM1 J2 J6 J4 DM DP J3 SMSC®

Figure 2.3 USB3740 EVB with the SMAs populated

3 USB3740 EVB Schematic

USB3740 10-pin 0.4mm Pitch QFN Evaluation Board

This portion of the schematic shows the required components for the Switch to operate properly This portion of the schematic is for testing of the switch in applications that are not USB USB3740 10-pin 3.4mm Pitch QFN Evaluation Board SMSC® 383X East Ray Road Scale 200 Phoenix Arizona 85044 480+78-80/80 USB3740 10-pin 3.4mm Pitch QFN Evaluation Board Size Document Number Rev B SCH=7240AZ-ADB A 200+78-80/80 VDD R1 ZERO VDD TP1 VCC TP2 Back P1 V_BUS C- D+ ID- GND SHILLU1 SHILLU2 SHILLU3 SHILLU4 USB mini AB SVD P2 DNP VCC D+ D- GND SH-Dr SH-Dr2 USB-E P3 DNP V_BUS D- D+ ID- GND SH-Dr1 SH-Dr2 SH-Dr3 SH-Dr4 SH-Dr5 SH-Dr6 USB MICRO-AU R4 ZERO C2 1.0uF USB/CMG-RAD

Figure 3.1 USB3740 EVB Schematic

4 USB3740 EVB Bill of Materials

Part Number	Quantity	Part Reference	Description	Digikey_Numbe	r	Manuf Manuf	FN RoHS DNP
1 2 C1 C3 CAPACITOR		CERAMIC 0.01UF	6.3V X5R 0201 PCC2136CT-ND PANASONIC ECJ-ZEB0J	103K Yes
2	1	C2	CAPACITOR CERAMIC 1.0UF 50V Y5V 0805	445-1364-1-ND	TDK	C2012Y5V1H105Z	Yes
3	6	J1 J2 J3 J4 J5 J6	RECEPTACLE, SMA, END_LAUNCH	J658-ND	EMERSON	142-0701-851	Yes	J1 J2 J3 J4 J5 J6
4	1	P1	CONNECTOR RECEPT USB MINI AB 5POS RT ANG	WM17122CT-ND	MOLEX	56579-0576	Yes
5	2	P2 P4	RECEPTACLE, USB, STYLE A, RIGHT ANGLE	609-1045-ND	FCI	87520-0010BLF	Yes
6	1	P3	RECEPTACLE, USB, STYLE B, RIGHT ANGLE	A31725-ND	TYCO ELECTRONICS	292304-1	Yes	P3
7	1	P5	CONNECTOR RECEPT MICRO USB TYPE AB SMT	A97799CT-ND	TYCO ELECTRONICS	1981584-1	Yes	P5
8	4	R1 R2 R3 R5	RESISTOR ZERO OHM 1/4W 5% 1206	311-0.0ERCT-ND	YAGEO	RC1206JR-070RL	Yes
9	1	R4	RESISTOR ZERO OHM 1/10W 5% 0603	311-0.0GRCT-ND	YAGEO	RC0603JR-070RL	Yes
10	2	SW1 SW2	SWITCH SLIDE SPDT SMD GULL	563-1022-1-ND	COPAL ELECTRONICS	CJS-1200TB	Yes
11	1	TP1	TEST POINT LOOP COMPACT RED	5005K-ND	KEYSTONE	5005	Yes
12	1	TP2	TEST POINT LOOP COMPACT BLACK	5006K-ND	KEYSTONE	5006	Yes
13	1	U1	USB3740		SMSC		Yes
14	1	U2	USB3740		SMSC		Yes

Figure 4.1 USB3740 EVB Bill of Materials

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