Renesas ISL43L710IR-T

Overview

ISL43L710IR-T from Intersil is a dual-channel, normally open (NO), single-pole/single-throw (SPST) analog switch optimized for low-voltage, low-distortion signal routing in battery-powered systems. It operates from a single +1.65V to +3.6V supply, delivers 0.16Ω ON-resistance at 3V, 13ns switching times, and supports 1.8V logic-compatible control. It is used in cellular phone ASIC interface expansion to add analog I/O without redesigning baseband ICs.

For engineers reviewing the ISL43L710IR-T datasheet, ISL43L710IR-T pinout, ISL43L710IR-T application, or ISL43L710IR-T equivalent, key selection criteria include ultra-low R_ON flatness (0.008Ω), bidirectional signal handling, <60nA leakage across temperature, and compatibility with space-constrained 3×3 mm TDFN packaging.

Technical Context

The ISL43L710IR-T implements a submicron CMOS SPST switch architecture with integrated level shifters that translate 1.8V logic inputs into full-rail gate drive for analog pass transistors. Its dual NO configuration enables independent channel control without inter-channel coupling.

It features ESD protection diodes on all analog pins (±8kV HBM), operates within -40°C to +85°C, and maintains R_ON matching ≤0.005Ω between channels - critical for differential-signal integrity in audio and sensor front-ends.

Key Specifications

Pinout & Package

ISL43L710IR-T is packaged in an 8-lead 3×3 mm thin Dual Flat No-Lead (TDFN) with exposed thermal pad (pkg code L8.3x3A). Pin 1 is marked by a mold feature in the top-left corner of the package outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL43L710IR-T, ISL43L210 offers enhanced low-voltage operation and reduced power, while TMUX1574 provides higher integration at the cost of R_ON and topology fidelity - making ISL43L710IR-T optimal for precision dual-NO routing where minimal insertion loss and channel matching are mandatory.

Availability

ISL43L710IR-T is available at Aetrix Electronics and suitable for cellular phone interface expansion, portable audio routing, medical sensor multiplexing, and handheld test equipment requiring stable component supply and long-term industrial availability.

Supply support for ISL43L710IR-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) is a U.S.-based semiconductor company specializing in precision analog, power management, and interface ICs for industrial, computing, and communications markets.

The ISL43L710IR-T belongs to the ISL43L71x family of ultra-low-R_ON analog switches designed specifically for battery-powered portable equipment where minimal signal degradation, low power, and small footprint are essential.

FAQ

What is the maximum supply voltage rating for the ISL43L710IR-T?

The ISL43L710IR-T has an absolute maximum supply voltage (V+ to GND) of 4.7V. Its operational range is +1.65V to +3.6V, and it is rated for continuous operation within this window. Exceeding 4.7V risks permanent damage due to internal ESD diode breakdown. The 4.7V headroom accommodates 10% tolerance on 3.6V supplies and transient overshoot in real-world battery and regulator environments. Always ensure V+ is applied before analog or digital signals to prevent forward-biasing protection diodes.

Does the ISL43L710IR-T support bidirectional analog signal flow?

Yes, the ISL43L710IR-T supports fully bidirectional analog signal routing. Both NO1↔COM1 and NO2↔COM2 paths conduct equally well in either direction, with no polarity restrictions. This is inherent to its CMOS transmission-gate architecture and enables flexible use in sensor interfaces, audio loops, and data acquisition systems where signal direction may vary. The analog signal range spans 0V to V+, and R_ON remains symmetric regardless of current direction - confirmed by datasheet test conditions specifying "bidirectional" operation and Figure 4 R_ON test setup.

What is the logic behavior of the IN pin on the ISL43L710IR-T?

The IN pin on the ISL43L710IR-T is an active-high digital control input. When IN = logic high (≥1.4V at 3V supply), both NO1 and NO2 switches close, connecting NO1↔COM1 and NO2↔COM2. When IN = logic low (≤0.5V), both switches remain open (non-conducting). This matches the truth table on page 2 of FN6092 Rev 3.00. The device does not include an inhibit function - that feature is exclusive to the ISL43L712 variant. The ISL43L710IR-T has no INH pin and relies solely on the IN signal for channel control.

Can the ISL43L710IR-T operate from a 1.8V supply, and how does performance change?

Yes, the ISL43L710IR-T is fully specified for operation down to +1.65V, including 1.8V nominal supply. At 1.8V, R_ON increases to 0.26Ω (typ), t_ON/t_OFF degrade to 30ns/25ns (typ), and R_ON flatness rises to 0.074Ω (typ). All parameters remain guaranteed across -40°C to +85°C. These shifts reflect standard CMOS threshold behavior and are documented in Tables on pages 4–5 of FN6092. System designers must verify signal integrity and timing margins at 1.8V, especially in high-frequency or low-distortion applications.

Is the ISL43L710IR-T pin-compatible with other devices in the ISL43L71x family?

No, the ISL43L710IR-T is not pin-compatible with ISL43L711IR-T or ISL43L712IR-T. While all three share the same 8-lead TDFN and MSOP footprints, their pin functions differ: ISL43L710 uses IN on Pin 1 and N.C. on Pin 8; ISL43L711 substitutes NC1/NC2 for NO1/NO2; ISL43L712 replaces Pin 3 with INH and swaps NO1/NC2 assignments. The datasheet's separate top-view pinouts (page 2) confirm distinct terminal mappings. PCB layout must match the exact variant - mixing variants without redesign will result in incorrect or non-functional switching behavior.