ISL43741IRZ

Analog Switches, Multiplexers, Demultiplexers Overview

The ISL43741IRZ is a precision, bidirectional analog switch configured as a differential 4-to-1 multiplexer/demultiplexer. It operates from single +2V to +12V or dual ±2V to ±6V supplies. The device features an inhibit and latch bar pin for state control. ON resistance is 39Ω at ±5V and 125Ω at +3.3V. Off-leakage current is 0.1nA at +25°C and 2.5nA at +85°C. Digital inputs have 0.8V to 2.4V logic thresholds for TTL/CMOS compatibility. Switching times are 32ns (tON) and 18ns (tOFF) at +5V. The package is a 20-lead 4x4 QFN.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Bidirectional differential 4-to-1 multiplexer configuration
• Single and dual supply operation with rail-to-rail signal handling
• Low charge injection and guaranteed break-before-make switching
• TTL and CMOS logic compatible digital inputs

Analog Switches, Multiplexers, Demultiplexers Applications

• Battery powered, handheld, and portable equipment
• Telecom infrastructure and ADSL/VDSL modems
• Medical ultrasound and MRI scanners
• Audio and video signal routing
• Sample and hold circuits and operational amplifier gain switching networks

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the component matches the specific datasheet FN6053.3 published by Renesas Electronics Corporation. Confirm the suffix IRZ indicates the lead-free RoHS compliant version in the 20 Ld QFN package. Ensure the operating temperature range of -40°C to +85°C aligns with system requirements. Check for moisture sensitivity level compliance if surface mount processing is planned.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this part when a differential multiplexer topology is required for low-voltage applications. The ISL43741 provides high off-isolation and crosstalk rejection suitable for high-frequency systems. Consider the on-resistance variation across different supply voltages, particularly at lower voltages like 3.3V where RON increases significantly compared to 5V or 12V operation.

Analog Switches, Multiplexers, Demultiplexers Part Context

This component belongs to the Intersil ISL43681 and ISL43741 family of precision analog switches. The ISL43741 specifically serves as the differential counterpart to the single-ended ISL43681 8-to-1 multiplexer. Both devices share identical electrical characteristics and packaging but differ in channel configuration and address pin usage.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

ISL43681IRZ: Single-ended 8-to-1 multiplexer variant within the same family.

Analog Switches, Multiplexers, Demultiplexers FAQ

How does the ISL43741 handle power supply sequencing?

Proper sequencing requires V+ and V- to be applied before any input signals to prevent forward biasing internal ESD protection diodes. Input signal voltages must remain between V+ and V-.

What is the maximum analog signal range?

The analog signal range extends from V- to V+, allowing for rail-to-rail signal handling regardless of whether single or dual supplies are used.

How is the last switch state preserved?

The device includes a latch bar (LE) pin. Connecting LE to GND locks in the last selected switch address, maintaining the state even if address inputs change.