Renesas ISL54063IRUZ-T

Overview

ISL54063IRUZ-T from Intersil is a dual normally open (NO) SPST analog switch optimized for low-voltage, low-distortion audio routing in portable equipment. It operates from a single +1.8V to +6.5V supply, delivers 0.55Ω typical ON-resistance at 4.5V, supports negative signal swing down to 6.5V below V+, and integrates click-and-pop elimination circuitry for direct speaker connection.

For engineers reviewing the ISL54063IRUZ-T datasheet, ISL54063IRUZ-T pinout, ISL54063IRUZ-T application, or ISL54063IRUZ-T equivalent, key selection criteria include sub-ohm r_ON matching (≤30 mΩ), guaranteed break-before-make timing, 1.8V logic compatibility, and µTQFN-10 (1.8×1.4 mm) package suitability for space-constrained handheld designs.

Technical Context

The ISL54063IRUZ-T implements a bidirectional CMOS analog switch architecture with integrated level shifters enabling 1.8V–3.3V logic control across its full +1.8V to +6.5V supply range. Its internal charge injection suppression and rail-to-rail negative signal handling (down to V+ − 6.5V) are co-designed with the click-and-pop elimination circuitry to minimize transient artifacts during switching.

Each channel features independent digital control (IN1/IN2), dedicated NO1/NO2 and COM1/COM2 terminals, and guaranteed break-before-make operation to prevent signal shorting. The device uses submicron CMOS process technology with 432 transistors and ties the exposed paddle to GND for thermal and ESD performance.

Key Specifications

Pinout & Package

ISL54063IRUZ-T is packaged in a 10-lead thin µTQFN (1.8 mm × 1.4 mm, 0.5 mm pitch) with exposed thermal pad tied to GND. Pin numbering follows standard top-view orientation with pin 1 marked by dot or chamfer.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual SPST analog switch applications.

Compared with TMUX1574RTER and ADG821BRMZ-REEL7, the ISL54063IRUZ-T uniquely combines sub-ohm r_ON, V+ − 6.5V negative swing, and integrated click/pop elimination - making it the only option qualified for direct speaker switching in compact battery-powered audio systems without external support circuitry.

Availability

ISL54063IRUZ-T is available at Aetrix Electronics and suitable for smartphone audio routing, portable medical monitor signal path management, and MP3 player output stage applications requiring stable component supply and long-term production continuity.

Supply support for ISL54063IRUZ-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Intersil Corporation, now part of Renesas Electronics, designs high-performance analog ICs for power management, precision analog, and interface applications with emphasis on efficiency, reliability, and signal integrity.

The ISL54063IRUZ-T belongs to Intersil's low-voltage analog switch product line, engineered specifically for battery-powered portable audio and medical devices demanding ultra-low r_ON, negative signal handling, and integrated acoustic artifact suppression.

FAQ

What is the maximum allowable analog signal voltage range for ISL54063IRUZ-T when operating from a +3.3V supply?

When V+ = +3.3V, the ISL54063IRUZ-T supports an analog signal range from (V+ − 6.5V) = −3.2V to V+ = +3.3V on NO1, NO2, COM1, and COM2 pins. This −3.2V to +3.3V range enables seamless handling of AC-coupled audio signals with ground-centered bias without clipping or diode conduction.

Does ISL54063IRUZ-T require external components to achieve click-and-pop elimination?

No, ISL54063IRUZ-T integrates dedicated click-and-pop elimination circuitry that operates autonomously during switching transitions. No external capacitors, resistors, or control sequencing are needed - the feature activates automatically when IN1 or IN2 toggles, suppressing transients to <10 mV peak on an 8 Ω load.

Can ISL54063IRUZ-T be used with a 1.8V logic supply while powered from a 5V analog rail?

Yes, ISL54063IRUZ-T supports independent logic and supply rails: digital inputs (IN1/IN2) accept 1.8V logic levels (VINH ≥1.0V, VINL ≤0.4V) even when V+ = 5V. Its internal level shifters translate these inputs to full-rail CMOS gate drive, ensuring reliable switching without additional interface circuitry.

What is the thermal resistance (θ_JA) of the ISL54063IRUZ-T µTQFN package, and how does it impact power dissipation?

The ISL54063IRUZ-T in 10-lead µTQFN has θ_JA = 155°C/W (typical). At maximum continuous current (±300 mA) and worst-case r_ON (1.97Ω), power dissipation is ~177 mW, resulting in ~27.5°C junction-to-ambient rise - well within the +150°C max rating. Layout with solid GND plane under the exposed pad further improves thermal performance.

Is the exposed thermal pad on ISL54063IRUZ-T electrically connected, and how should it be handled in PCB layout?

Yes, the exposed pad on ISL54063IRUZ-T is internally connected to GND. It must be soldered to a thermally robust GND copper pour using ≥4 thermal vias (0.3 mm diameter) to inner GND planes. This connection lowers θ_JA, improves ESD robustness (>6 kV HBM), and stabilizes analog performance by minimizing ground bounce during fast switching.