USB Interface

This section describes the interface requirements for an OEM7 receiver card USB port. For general information about the OEM7 receiver card USB ports, see USB Ports.

OEM7 receivers include an USB 2.0 device interface set to either Full-Speed (12 Mb/s) or High-Speed (480 Mb/s) transfer rate. On the OEM719 and OEM729 receivers, the transfer rate for the USB Device port is Full-Speed (12 Mb/s). The USB device interface on the OEM7600, OEM7700 and OEM7720 receivers use the High-Speed (480 Mb/s) transfer rate. The device interface will not auto-negotiate the speed with the Host computer.

It is imperative for signal integrity and EMI reasons that the differential data traces be routed as a 90Ω differential pair. Use of a small-value common-mode choke (as shown in Figure: OEM7 USB Device Interface Example) may improve the radiated emissions performance (but should not be necessary).

Any stubs on the traces must be kept as short as possible and it is strongly recommended not to change reference planes. Match the USB differential pair (D+ and D- trace lengths) to within 3 mm or less.

The common-mode choke and ESD protection should be placed as close as possible to the USB connector (J1).

OEM7 USB Device Interface Example

USB Device Interface Pin Designation

 

OEM719

OEM729

OEM7600

OEM7700

OEM7720

Connector

P1701

P1802

P1803

P1701

P2001

P1901

USB0_D-

3

21

-

50

50

50

USB0_D+

41

22

-

48

48

48

USB1_D-

-

-

-

47

47

47

USB1_D+

-

-

-

49

49

49

USB_VBUS

-

-

15

52

52

52

UID

-

-

14

51

51

51
USB Device Interface Example Bill of Materials

Designator

Manufacturer

Manufacturer Part Number

D1

On Semiconductor

ESD7L5.0DT5G

D2

On Semiconductor

ESD5Z6.0T1G

FB1

TDK

MMZ1005B800C

L1

Wurth Electronics

744230900

J1

FCI

10104110-0001LF

 

OEM7 USB Host Device Interface Example

USB Host Interface Pin Designation

 

OEM719

OEM729

OEM7600

OEM7700

OEM7720

Connector

P1701

P1802

P1803

P1701

P2001

P1901

USB0_D-

3

21

-

50

50

50

USB0_D+

42

22

-

48

48

48

USB1_D-

-

-

-

47

47

47

USB1_D+

-

-

-

49

49

49

USB_VBUS

-

-

15

52

52

52

UID

-

-

14

51

51

51
USB Host Interface Example Bill of Materials

Designator

Manufacturer

Manufacturer Part Number

D1

On Semiconductor

ESD7L5.0DT5G

D2

Littelfuse

V5.5MLA0402NR

FB1

TDK

MMZ1005B800C

J1

Molex

0482040001

L1

Wurth Electronics

744230450