The Intersil ISL54409 and ISL54410 are Dual SPST

(Single Pole/Single Throw) switches that provide a very

low distortion audio path for a stereo headphone and

can be connected in a wired-OR configuration at the

switch outputs with USB2.0 HS signals for Audio/USB

signal multiplexing to a common connector. The audio

switch path can be disabled to provide high signal

isolation, preventing crosstalk between the audio codec

and USB data signals.

The ISL54409 and ISL54410 analog switches are

negative swing capable with a single supply voltage and

maintain excellent THD performance within a signal

range of -1V to +1V. The switch terminals have low pin

capacitance (4pF typical), minimizing impact to USB 2.0

High-Speed signals. The ISL54409 offers a Low Power

Shutdown mode while the ISL54410 offers a High

Off-Isolation mode. The ISL54410 contains active Audio

Click and Pop Elimination circuitry for AC-coupled audio

signals.

The ISL54409 and ISL54410 are available in a 8 Ld

TDFN (2mmx2mm) or a 10 Ld μTQFN (1.8mmx1.4mm)

package. They operate over a temperature range of

-40 to +85°C.

特性 Features

? Single Supply Operation (VDD) . . . +2.7V to +5.0V

? Negative Signal Handling (See “Audio/USB wired-OR

Application” on page 8 on protecting USB controller)

? Low OFF Capacitance for HS USB . . . . . . . . . .4pF

? Power Off Protection

? THD+N at 1mW into 32Ω Load . . . . . . . . <0.02

? Audio Muting . . . . . . . . . . . . . . . . . . . . .>110dB

? Low Power Consumption. . . . 21μW with 3V supply

? Low Power Shutdown Mode (ISL54409)

? Active Click and Pop Elimination Circuitry (ISL54410)

? USB VBUS Hot Plug Operation

? Available in 8 Ld TDFN (2mmx2mm) or 10 Ld μTQFN

(1.8mmx1.4mm) Package

Applications

? Consumer Entertainment Systems

? MP3 and other Personal Media Players

? Cellular/Mobile Phones and PDAs