ISL54405IVZ

Analog Switches - Special Purpose Overview

The ISL54405IVZ 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 TSSOP 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-start functionality to suppress transients during power-up/down and switching events.
• Dual SPDT architecture with T-Type switch cells providing high OFF-isolation (>120dB) and ultra-low distortion for hi-fidelity audio reproduction.
• Configurable AC/DC coupling support with selectable Click/Pop shunt locations via dedicated control pins.

Analog Switches - Special Purpose Applications

• Computer sound cards
• Home theater audio products
• SACD/DVD audio systems
• Headset switching for MP3 players and cellphones

Analog Switches - Special Purpose Procurement Notes

Verify the specific suffix IVZ corresponds to the 16-lead TSSOP package variant when sourcing. Confirm RoHS compliance and Pb-free status as indicated by the manufacturer's ordering information. Ensure the supplier provides documentation verifying the component meets the specified -40°C to +85°C operating temperature range.

Analog Switches - Special Purpose Selection Notes

Select this component for applications requiring low distortion and high isolation in stereo audio paths. Ensure the design accommodates the 1.8V logic voltage thresholds for SEL, MUTE, AC/DC, and DIR_SEL pins. Verify that the external capacitor on the CAP_SS pin aligns with the desired mute-to-on transition time and signal ramp rate requirements.

Analog Switches - Special Purpose Part Context

Manufactured by Renesas Electronics Corporation (formerly Intersil), the ISL54405 belongs to a family of high-performance analog switches. The IVZ designation specifically identifies the 16-lead TSSOP package version within the broader ISL54405 product line, which also includes TQFN and µTQFN variants.

Analog Switches - Special Purpose Replacement Considerations

Direct replacements include the ISL54405IRTZ (16 Ld 3x3 TQFN) and ISL54405IRUZ-T (16 Ld µTQFN). These share identical electrical specifications but differ in physical footprint and thermal characteristics. Verify pinout compatibility and package dimensions before substitution.

Analog Switches - Special Purpose FAQ

How does the ISL54405 eliminate clicks and pops?

It uses internal Click/Pop (C/P) shunt circuitry and a soft-start feature. The C/P shunts provide a low-impedance path to discharge transients, while the soft-start gradually decreases switch resistance to ramp up the output voltage slowly.

What is the function of the AC/DC and DIR_SEL pins?

These pins configure the Click/Pop shunt circuitry. Driving AC/DC HIGH activates the shunts, and DIR_SEL determines whether they are located on the COM side (L, R) or the signal side (L1, R1, L2, R2) of the switch.

Can the ISL54405 handle signals below ground?

Yes, the device incorporates internal charge pumps that allow it to pass ground-referenced analog signals swinging below ground, supporting ±2.828VPEAK (2VRMS) operation.