ISL54208EVAL1Z Intersil, ISL54208EVAL1Z Datasheet - Page 3

• Manufacturer Part Number: ISL54208EVAL1Z
• Description: EVALUATION BOARD FOR ISL54208
• Manufacturer: Intersil

Specifications of ISL54208EVAL1Z

• Main Purpose: Interface, Analog & Digital Switch
• Embedded: No
• Utilized Ic / Part: ISL54208
• Primary Attributes: 2 x SPDT Audio, USB & Video Switch
• Secondary Attributes: 1.8 V ~ 5.5 V Supply
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

connected to VIDEO OUT (J5) and the audio input port of
the TV should be connected to MONO AUDIO OUT (J7).
The BNC connector J6 is in parallel with J5 and the D- line of
the J4 (USB TO HOST) connector. The BNC connector J8 is
in parallel with J7 and the D+ line of the J4 (USB TO HOST)
connector. These BNC connectors can be used to connect
resistive loads and/or test equipment to evaluate the
performance of the IC.
Note: When in USB mode, devices on the audio/video
outputs need to be in a high impedance state so it will not
interfere with the USB signal, since the USB and A/V
connections on the output/upstream side are all wired in
parallel.
USB Connections
A “B” type USB receptacle labeled “USB TO HOST” (J4) is
located on the left underside of the board. This receptacle
should be connected, using a standard USB cable, to the
up-stream USB host controller which is usually a PC
computer or hub. When this connection is made and the IN
logic control is driven HIGH, the ISL54208 device will go into
USB mode. High Speed USB signals can be passed
between J4 and J12.
An “A” type USB receptacle labeled USB TO DEVICE (J12)
is located on the right underside of the board. The USB
device can be plugged directly into this receptacle or through
a standard USB cable.
In USB mode the USB host controller and USB device will
be connected through the internal NO switches of the IC.
The NO switches are bi-directional which allow the host
(computer) and downstream USB device to both send and
receive data.
JP1 and JP2 permit the connection of differential probes for
monitoring of the USB signals. JP1 is used for monitoring on
the device side. JP2 is used for monitoring on the host side.
In addition, BNC connectors J9 (D-) and J10 (D+) can be
connected in parallel to J12 for monitoring the USB signals
on the device side using an oscilloscope. Normally, J9 and
J10 are not connected to the USB signal path. If the user
requires BNC connections to the USB signals on the device
side, then R
1
and R
2
on the evaluation board can be
3
Application Note 1359
populated with 0Ω resistors. R
the J9 and J10 BNC connectors.
Note: Before connecting the USB host controller at
connector J4, the A/V connections must be disconnected (or
set to high impedance) from the VIDEO OUT and MONO
AUDIO OUT connectors (J5-J8). This will prevent the
audio/video load from interfering with USB signal
transmission.
Application
The main purpose of the ISL54208 device is to allow the use
of a common USB and Audio/Video Connector in Personal
Media Players and other portable battery powered
equipment. Either a TV monitor will be in the common
connector to play video or a USB cable from a computer will
be in the common connector to transmit digital data, such as
music videos or MP3 songs into the memory of the Media
Player.
Board Component Definitions
DESIGNATOR
JP1, JP2
J13, J14
J15, J16
J5, J6
J7, J8
JP3
JP4
J10
J11
J12
U1
J1
J2
J3
J4
J9
ISL54208IRUZ IC
Ground Connection
V
IN Logic Input
“B” type USB Receptacle
VIDEO OUT Outputs
MONO AUDIO OUT Outputs
USB (D-) BNC Connector
USB (D+) BNC Connector
CTRL Logic Input
“A” type USB Receptacle
VIDEO IN Inputs
MONO AUDIO IN Inputs
D-/D+ Differential Probe Connection
V
4.3MΩ Pull-Down Disconnect
DD
BUS
Positive Connection
Logic Control Connection
1
DESCRIPTION
and R
2
are located between
June 23, 2008
AN1359.0