ISL54211 Datasheet, PDF (9/19 Pages) Intersil Corporation – MP3/USB 2.0 High Speed Switch with Negative Signal Handling/Click and Pop Suppression

Typical Application Block Diagrams
ISL54211
V_BUS
3.3V
VDD
ISL54211
IN
LOGIC CONTROL
4MΩ
CTRL
4MΩ
D-
COM -
200kΩ
D+
COM +
200kΩ
CLICK
R
AND
L
POP
GND
µCONTROLLER
USB
HIGH-SPEED
TRANSCEIVER
AUDIO
CODEC
LOGIC CONTROL VIA MICROPROCESSOR
3.3V
V_BUS
500kΩ
VDD
ISL54211
IN
LOGIC CONTROL
4MΩ
CTRL
4MΩ
D-
COM -
200kΩ
D+
COM +
200kΩ
CLICK
R
AND
L
POP
GND
µCONTROLLER
USB
HIGH-SPEED
TRANSCEIVER
AUDIO
CODEC
LOGIC CONTROL VIA V_BUS VOLTAGE FROM COMPUTER OR USB HUB
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
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
9
FN6662.1
August 25, 2008