ISL54405IRTZ

Analog Switches - Special Purpose Overview

The ISL54405IRTZ is a single-supply, bidirectional, dual SPDT analog switch designed for CD/MP3 quality stereo audio applications. It operates from a 3.3V or 5V supply and supports ±2VRMS ground-referenced signals. Key electrical parameters include -106dB THD+N into a 20kΩ load at 2VRMS, >124dB SNR, and ±0.01dB insertion loss at 1kHz. The device features 1.8V logic-compatible inputs, 125dB signal muting, and 90dB PSRR across the 20Hz to 20kHz band. It is housed in a 16-lead 3mm x 3mm TQFN package and specified for operation between -40°C and +85°C.

Analog Switches - Special Purpose Feature Summary

• Integrated click and pop elimination circuitry with soft-switch capability to suppress transients during power-up/down and switching events
• Dual SPDT architecture with T-Type switch cells providing high OFF-isolation and superior signal muting performance
• Low on-resistance of 1.9Ω with minimal flatness variation for ultra-low distortion audio signal routing
• Configurable AC/DC coupling support with selectable click/pop shunt locations via control pins

Analog Switches - Special Purpose Applications

• Computer sound cards
• Home theater audio products
• SACD/DVD audio systems
• Headsets for MP3/cellphone switching
• Hi-Fi audio switching applications

Analog Switches - Special Purpose Procurement Notes

Verify the specific ordering suffix 'IRTZ' corresponds to the 16-lead 3x3mm TQFN package variant when sourcing. Confirm RoHS compliance and Pb-free status as indicated by the manufacturer's documentation. Ensure the supplier provides valid traceability data for moisture sensitivity level handling requirements.

Analog Switches - Special Purpose Selection Notes

Select this component for applications requiring low distortion stereo audio switching with integrated transient suppression. Ensure the system design accommodates the 1.8V logic compatibility for control signals. Verify that the thermal management strategy aligns with the junction-to-ambient thermal resistance specifications for the TQFN package under expected operating conditions.

Analog Switches - Special Purpose Part Context

Manufactured by Renesas Electronics Corporation (formerly Intersil), the ISL54405 belongs to a family of high-performance analog switches optimized for consumer and professional audio. It addresses the need for clean signal path switching in portable and stationary audio equipment without external discrete components for mute or click suppression.

Analog Switches - Special Purpose Replacement Considerations

ISL54405IVZ: Identical functionality but packaged in a 16-lead TSSOP format instead of TQFN.

Analog Switches - Special Purpose FAQ

How does the ISL54405 eliminate clicks and pops?

It uses special click/pop shunt circuitry at each signal pin and a soft-start feature that gradually decreases switch resistance during transitions, suppressing voltage transients.

What is the maximum analog signal amplitude supported?

The device can accommodate ground-referenced signals up to 2VRMS (±2.828VPEAK) while operating from a single 3.3V or 5V DC supply.

How are the C/P shunt circuits controlled?

The activation and location of the click/pop shunt circuitry are determined by the logic levels applied to the AC/DC and DIR_SEL control pins.