ISL43L840IRZ

Analog Switches, Multiplexers, Demultiplexers Overview

The ISL43L840IRZ is a precision, bidirectional analog switch configured as a dual 4-channel multiplexer/demultiplexer. It operates from a single +1.6V to +3.6V supply. On-resistance is 0.5Ω at +3.0V and 0.62Ω at +1.8V. Off-leakage current is 4nA max at +25°C and 30nA max at +85°C with a +3.3V supply. Digital inputs are 1.8V logic-compatible at +3V supply. Power consumption is less than 0.2µW. Transition times are 19ns at +3V and 24ns at +1.8V. Channel-to-channel matching is 0.12Ω. Ron flatness is 0.056Ω. Charge injection is -96pC. The device handles rail-to-rail analog signals and offers 300mA continuous current capacity. It is housed in a 16-lead 3x3 QFN package.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Ultra-low on-resistance for minimal signal loss
• Single-supply operation compatible with low-voltage systems
• Bidirectional switching with rail-to-rail signal handling
• Low power consumption suitable for battery-operated devices

Analog Switches, Multiplexers, Demultiplexers Applications

• Portable instrumentation
• Battery-powered meters
• Automatic test equipment
• Data acquisition systems

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

The ISL43L840IRZ has reached end-of-life status, with discontinuation notifications issued by the manufacturer. Availability is restricted to existing stock or surplus channels. Verification of authenticity and storage history is critical due to the component's age. Moisture sensitivity level 2 requires careful handling if the seal was compromised. Designers should initiate replacement strategies immediately to ensure long-term supply chain stability.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

This component is selected for applications requiring low voltage operation and high channel density in a small footprint. The dual 4:1 configuration reduces board space compared to individual switches. Consider the 1.8V logic compatibility when interfacing with microcontrollers. The low on-resistance ensures signal integrity in precision measurement paths. Evaluate the transition time requirements against system speed needs.

Analog Switches, Multiplexers, Demultiplexers Part Context

The ISL43L840 is part of Intersil's family of ultra-low on-resistance analog switches. It shares functional similarities with other devices in the series but offers specific pinout and performance characteristics tailored for low-voltage applications. The IRZ suffix denotes the RoHS-compliant 16-lead QFN package variant. This part bridges the gap between general-purpose switches and specialized video switches in terms of bandwidth and resistance.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the end-of-life status, direct pin-to-pin replacements may require verification of electrical parameter equivalence. Engineers should consult the manufacturer's obsolescence notices for recommended alternative components within the updated Renesas portfolio.