ISL54208EVAL1Z Intersil, ISL54208EVAL1Z Datasheet - Page 8

• 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

Application Block Diagrams
Detailed Description
The ISL54208 device is a dual single pole/double throw
(SPDT) analog switch device that can operate from a single
dc power supply in the range of 1.8V to 5.5V. It was
designed to function as a dual 2 to 1 multiplexer to select
between USB differential data signals and mono
audio/composite video baseband signals (CVBS). It comes
in tiny
camcorders, video MP3 players, PDAs, cell phones, and
other personal media players.
The part consists of two 3Ω audio/video switches and two
5Ω USB switches. The audio/video switches can accept
signals that swing below ground. They were designed to
pass ground reference audio or dc restored with synch
composite video signals with minimal distortion. The USB
switches were designed to pass high-speed USB differential
data signals with minimal edge and phase distortion.
μ
TQFN and TDFN packages for use in cameras,
VBUS
VBUS
8
LOGIC CONTROL VIA VBUS VOLTAGE FROM COMPUTER OR USB HUB
22kΩ
4MΩ
COM2
COM2
COM1
COM1
IN
IN
LOGIC CONTROL VIA MICRO-PROCESSOR
LOGIC CIRCUITRY
LOGIC CIRCUITRY
ISL54208
ISL54208
VDD
VDD
GND
GND
ISL54208
4MΩ
4MΩ
50kΩ
50kΩ
50kΩ
50kΩ
The ISL54208 was specifically designed for digital cameras,
camcorders, MP3 players, cell phones and other personal
media player applications that need to combine the
audio/video jacks and the USB data connector into a single
shared connector, thereby saving space and component
cost. Typical application block diagrams of this functionality
is shown above.
The ISL54208 logic control pins are 1.8V logic compatible
and can be driven by a standard
logic control pin (IN) that selects between the audio/video
switches and the USB switches. The ISL54208 also contains
a logic control pin (CTRL) that when driven Low while IN is
Low, opens all switches and puts the part into a low power
state, drawing typically 1nA of I
A detailed description of the two types of switches is
provided in the sections below. The USB transmission and
CTRL
CTRL
NO1
NO2
NC1
NC2
NO1
NO2
NC1
NC2
D-
D+
D-
D+
μ
CONTROLLER
μ
TRANSCEIVER
TRANSCEIVER
CONTROLLER
HIGH-SPEED
NTSC or PAL
HIGH-SPEED
NTSC or PAL
VIDEO
AUDIO
VIDEO
AUDIO
USB
DD
USB
μ
controller. It has a single
current.
December 18, 2006
FN6410.0