Renesas ISL43L220IRZ

Overview

ISL43L220IRZ from Intersil is a dual SPDT analog switch optimized for ultra-low on-resistance (0.22 Ω at 4.3 V), single-supply operation (1.1 V to 4.5 V), and fast switching (t_ON = 11 ns, t_OFF = 5 ns). It serves as a bidirectional signal path selector in portable audio/video routing and battery-powered ASIC interface expansion.

For engineers reviewing the ISL43L220IRZ datasheet, ISL43L220IRZ pinout, ISL43L220IRZ application, or ISL43L220IRZ equivalent, key selection criteria include guaranteed break-before-make timing, R_ON matching (≤0.03 Ω), 1.8 V logic compatibility at 3 V supply, and ESD robustness (>9 kV HBM).

Technical Context

The ISL43L220IRZ implements two independent SPDT switches with normally open (NO) and normally closed (NC) terminals per channel, configurable as dual 2:1 multiplexers. Its submicron CMOS process enables low leakage (≤110 nA over temperature) and high-speed switching across 1.1–4.5 V supply range.

Internal level shifters translate 1.8 V-compatible digital inputs into full-rail gate drive for analog switches, ensuring consistent R_ON flatness (≤0.08 Ω) and minimal charge injection (≤128 pC). Break-before-make delay is guaranteed ≥2 ns to prevent signal shorting during state transitions.

Key Specifications

Pinout & Package

ISL43L220IRZ is housed in a 10-lead 3×3 mm thin DFN package (PKG DWG L10.3x3A) with exposed thermal pad. Pin 1 is marked by index area in top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4684ETA+, ISL43L220IRZ offers wider supply range (1.1–4.5 V vs 1.8–5.5 V) and lower R_ON, enabling deeper battery discharge utilization; versus ISL43L210IRZ, it trades 0.03 Ω higher R_ON for broader availability and cost optimization in mid-tier portable designs.

Availability

ISL43L220IRZ is available at Aetrix Electronics and suitable for cellular phone audio routing, portable medical sensor hubs, and handheld test equipment requiring stable component supply and long-term production continuity.

Supply support for ISL43L220IRZ 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) is a U.S.-based semiconductor company specializing in precision analog, power management, and interface ICs for industrial, computing, and communications markets.

The ISL43L220IRZ belongs to Intersil's ultra-low-voltage analog switch product line, designed specifically for extending functionality in space- and power-constrained portable electronics while maintaining signal fidelity and reliability.

FAQ

What is the minimum operating voltage for ISL43L220IRZ?

The ISL43L220IRZ operates down to +1.1 V, enabling use in deeply discharged lithium-ion battery systems and ultra-low-power wearable devices. At 1.1 V, R_ON rises to 3.4 Ω (max) and switching times increase to 35 ns t_ON, but logic compatibility remains functional with adjusted input thresholds (V_INH ≥ 0.6 V, V_INL ≤ 0.3 V). The ISL43L220IRZ maintains guaranteed break-before-make timing across the full 1.1–4.5 V range.

Does ISL43L220IRZ support rail-to-rail analog signal switching?

Yes, the ISL43L220IRZ supports rail-to-rail analog signal switching from 0 V to V+, with analog signal range explicitly specified as 0 to V+ across all supply voltages (1.1–4.5 V). This allows full utilization of the supply headroom in audio, sensor, and video applications without clipping or distortion. The ISL43L220IRZ achieves this via internal level-shifting circuitry that ensures proper gate biasing across the entire analog input range.

How does ISL43L220IRZ handle overvoltage conditions on analog pins?

The ISL43L220IRZ includes ESD protection diodes from each analog pin (NO, NC, COM) to V+ and GND. To prevent forward conduction, analog signals must remain within –0.3 V to (V+ + 0.3 V). If overvoltage is possible, external series diodes on V+ and GND (per Figure 8 in FN6093) limit signal excursion to 1 V beyond rails. This approach preserves low leakage (<110 nA) while protecting the ISL43L220IRZ from damage.

Is ISL43L220IRZ pin-compatible with other industry-standard analog switches?

Yes, the ISL43L220IRZ is explicitly documented as pin-compatible with the MAX4684 and MAX4685, sharing identical 10-lead 3×3 mm DFN footprint and pin assignments (V+, GND, IN1, COM1, NO1, NC1, NO2, COM2, IN2, NC2). This allows drop-in replacement in existing layouts designed for those Maxim parts, provided system-level validation confirms equivalent timing and leakage behavior for the target application.

What is the thermal performance of ISL43L220IRZ in its DFN package?

The ISL43L220IRZ in its 10-lead 3×3 mm thin DFN package has a typical junction-to-ambient thermal resistance (θ_JA) of 47 °C/W and junction-to-case (θ_JC) of 10.5 °C/W. With maximum junction temperature rated at 150 °C and continuous current limited to ±300 mA per terminal, the package supports reliable operation in handheld devices up to 85 °C ambient when mounted on standard 2-layer PCBs with adequate copper pour under the exposed pad.