isl54211 Intersil Corporation, isl54211 Datasheet - Page 9

• Manufacturer Part Number: isl54211
• Description: Mp3/usb 2.0 High Speed Switch With Negative Signal Handling/click And Pop Suppression
• Manufacturer: Intersil Corporation

Typical Application Block Diagrams
Detailed Description
The ISL54211 device is a dual single pole/double throw
(SPDT) analog switch that operates from a single DC power
supply in the range of 2.7V to 5.0V. It was designed to
function as dual 2-to-1 multiplexer to select between USB
differential data signals and audio L and R stereo signals. It
V
V
BUS
BUS
9
LOGIC CONTROL VIA V
500kΩ
COM -
COM +
LOGIC CONTROL VIA MICROPROCESSOR
COM -
COM +
IN
IN
4MΩ
4MΩ
200kΩ
200kΩ
200kΩ
200kΩ
LOGIC CONTROL
LOGIC CONTROL
3.3V
3.3V
BUS
GND
GND
ISL54211
ISL54211
VDD
VDD
VOLTAGE FROM COMPUTER OR USB HUB
ISL54211
CLICK
CLICK
AND
POP
POP
AND
comes in a tiny µTQFN package for use in MP3 players,
PDAs, cellphones, and other personal media players.
The part consists of two 2.5Ω audio switches and two 5.5Ω
USB switches. The audio switches can accept signals that
swing below ground. They were designed to pass audio left
and right stereo signals, that are ground referenced, with
minimal distortion. The USB switches were designed to pass
4MΩ
4MΩ
CTRL
CTRL
D-
D+
R
L
D-
D+
R
L
µCONTROLLER
TRANSCEIVER
TRANSCEIVER
µCONTROLLER
HIGH-SPEED
HIGH-SPEED
CODEC
CODEC
AUDIO
AUDIO
USB
USB
August 25, 2008
FN6662.1