ISL54402EVAL1Z Intersil, ISL54402EVAL1Z Datasheet - Page 3

• Manufacturer Part Number: ISL54402EVAL1Z
• Description: EVALUATION KIT FOR ISL54402
• Manufacturer: Intersil

Specifications of ISL54402EVAL1Z

• Main Purpose: Interface, Analog & Digital Switch
• Embedded: No
• Utilized Ic / Part: ISL54402
• Primary Attributes: 2 x SPDT Audio & USB Switch
• Secondary Attributes: 1.8 V ~ 5.5 V Supply
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

loads and/or test equipment to evaluate the performance of
the IC.
USB Connections
A “B” type USB receptacle labeled USB TO HOST (J1) is
located on the left under-side of the board. This receptacle
should be connected, using a standard USB cable, to the
up-stream USB host controller which is usually a computer.
When this connection is made, an ISL54400 or ISL54401
device will sense the V
and go into USB mode. The USB switches will be turned ON
and the IC will get its power from the VBUS line.
When evaluating the ISL54402 in a USB application J13
needs to be connected to J12 for proper operation. When
the USB cable from the computer is connected at J1 the
NOx switches will both turn ON.
An “A” type USB receptacle labeled USB TO DEVICE (J2) is
located on the right under-side of the board. This receptacle
should be connected to the USB device using a standard
USB cable or, if possible, plug the USB device directly into
this receptacle. In USB mode the USB host controller and
USB device will be connected through the internal USB
switches of the IC. Unlike the audio switches, the USB
switches are bi-directional which allow the host (computer)
and downstream USB device to both send and receive data.
Note: Before connecting the USB host controller at
connector J1 the headphones must be removed from the
headphone speaker jack J7. This will prevent the audio load
from interfering with USB signal transmission. The main
purpose of the ISL54400 and ISL54401 devices is to allow
the use of a common USB and Audio Headphone Connector
in Personal Media Players and other portable battery
powered equipment. Either a headphone will be in the
common connector to play music or a USB cable from a
computer will be in the common connector to transmit digital
data, such as music, into the memory of the Media Player.
The BNC connector J8 (D-/L/COM1) is in parallel with the D-
line of the J1 USB connector. The BNC connector J9
(D+/R/COM2) is in parallel with the D+ line of the J1 USB
connector. The BNC connector J13 (VBUS/IN2) is in parallel
with the V
connector J14 (D-) is in parallel with the D- line of the J2
USB connector. The BNC connector J15 (D+) is in parallel
with the D+ line of the J2 USB connector. These BNC
connectors can be used to connect test equipment to
evaluate the performance of the IC. The board has 0Ω
resistors R2, R3, R4 and R5 that can be de-populated to
disconnected BNC jacks J7, J8, J9, J14, J15 and headphone
jack J7 from the switch signal path. See schematic for which
resistors go to which connectors.
BUS
line of the J1 USB connector. The BNC
BUS
voltage from the host controller
3
Application Note 1255
V
To use VTERM output of the ISL54400 part and the 1.5k
resistor (R1) on the board will require a jumper installed at
JP1. For a USB full-speed device (12Mb/s) connect jumper
from middle post to left post of JP1. For a USB low-speed
device (1.5Mb/s) connect jumper from middle post to right
post of JP1.
NOTE: V
lower in voltage than the voltage at VDD (J10 and J11).
VTERM will output a voltage in the range of 3.0V to 3.6V
when V
If the VTERM output is not going to be used, leave the JP1
jumper unpopulated. The jumper should also be
unpopulated when evaluating the ISL54401 and ISL54402
ICs.
Board Component Definitions
TP2, TP6, TP7,
DESIGNATOR
TERM
TP8, TP9
J3, J5
J4, J6
TP1
TP3
TP4
TP5
JP1
JP2
JP3
J10
J11
J12
J13
J14
J15
U1
J1
J2
J7
J8
J9
BUS
Connection (ISL54400 only)
TERM
voltage is >4.4V and V
is high impedance if VBUS is floating or
10 Ld Dip Socket
“B” type USB Receptacle
“A” type USB Receptacle
Left Stereo Audio Input
Right Stereo Audio Input
Headphone Speaker Jack
D-/L/COM1 BNC Connector
D+/L/COM2 BNC Connector
VDD Positive Connection
VDD Negative Connection
VTERM/IN1
VBUS/IN2
D- BNC Connector
D+ BNC Connector
Jumper to Connect VTERM through 1.5kΩ resistor
to either D+ or D- Line
D- and D+ Differential Test Probe Connection USB
Host (COM) Side of Switch
D- and D+ Differential Test Probe Connection USB
Device Side of Switch
VDD Test Point
Ground Test Point
Audio Left Input Test Point
Audio Right Input Test Point
VBUS Test Point
DESCRIPTION
DD
is >2.5V.
July 19, 2006
AN1255.0
Ω