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
signals up to 2VRMS while operating from a single 3.3V or 5V DC
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.
With -106dB THD+N performance with a 2VRMS signal into
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.

Features
• Clickless audio switching
• 2 switches
• Switch type SPDT or 2 to 1 MUX
• 2VRMS signal switching from 3.3V or 5V supply
• -106dB THD+N into 20k load at 2VRMS
• -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
• Available in 16 Ld TSSOP, 16 Ld TQFN, and 16 Ld µTQFN
• 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