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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

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All other trademarks mentioned are the property of their respective owners.

CD/MP3 Quality Stereo 2:1 Multiplexer with Click and

Pop Elimination

ISL54405

The Intersil ISL54405 is a single supply, bidirectional, dual

single-pole/double-throw (SPDT) ultra low distortion, high

OFF-Isolation analog switch that can pass analog signals that

are positive and negative with respect to ground. It is primarily

targeted at consumer and professional audio switching

applications such as computer sound cards and home theater

products. The inputs can accommodate ground referenced

supply. The digital logic inputs are 1.8V logic-compatible when

using a single 3.3V or 5V supply. It can be used in both AC or DC

coupled ground referenced applications.

The ISL54405 features a soft-switch feature and click/pop

circuitry at each signal pin that eliminates clicks and pops

associated with power-up/down conditions of the preceding

amplifier outputs.

20k

 load, superior signal muting, high PSRR and very flat

frequency response, the ISL54405 meets the exacting

requirements of consumer and professional audio engineers.

The ISL54405 is available in 16 Ld TSSOP, 16 Ld 3mmx3mm

TQFN, and 16 Ld 2.6mmx1.8mm µTQFN packages. It’s specified

for operation over the -40°C to +85°C temperature range.

Related Literature

• TB363 “Guidelines for Handling and Processing Moisture

Sensitive Surface Mount Devices (SMDs)”

• AN557 “Recommended Test Procedures for Analog

Switches”

Features

• Clickless audio switching

•2 switches

• Switch type SPDT or 2 to 1 MUX

• -106dB THD+N into 20k

• -108dB THD+N into 32

 load at 3.9mW

• Signal to noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >124dBV

• ±0.01dB insertion loss at 1kHz, 20k

 load

• ±0.007dB gain variation 20Hz to 20kHz

• 125dB signal muting into 20k

 load

• 90dB PSRR 20Hz to 20kHz

• Single supply operation . . . . . . . . . . . . . . . . . . . . . . . . . 3.3V or 5V

• Pb-Free (RoHS compliant)

Applications

• Computer sound cards

• Home theater audio products

•SACD/DVD audio

• DVD player audio output switching

• Headsets for MP3/cellphone switching

• Hi-Fi audio switching application

FIGURE 1. ISL54405 BLOCK DIAGRAM

LOGIC

ISL54405

SEL

MUTE

L

R

L1

L2

R1

R2

CAP_SS

VDD

5V_Supply

For 5V operation connect the 5V_Supply pin to 5V and float the

VDD pin. For 3.3V operation connect the VDD pin to 3.3V and float

GND

AC/DC

the 5V_Supply pin.

DIR_SEL

CONTROL

AND

CLICK/POP

May 6, 2014

FN6699.2