ISL43L121IUZ-T

Analog Switches, Multiplexers, Demultiplexers Overview

The ISL43L121IUZ-T is a dual single-pole/single-throw (SPST) analog switch manufactured by Renesas Electronics Corporation. It features two normally closed (NC) switches within an 8-lead MSOP package. The device operates on a single supply voltage ranging from 1.65V to 3.6V, with a maximum on-resistance of 0.3Ω at 25°C and 0.4Ω across the full temperature range. Key electrical parameters include a turn-on/turn-off time of 25ns at 3V and 35ns/40ns at 1.8V, charge injection of -125pC, and off-isolation of 62dB at 100kHz. The component supports continuous current up to 300mA and functions within a temperature range of -40°C to 85°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Dual SPST configuration with normally closed contacts for signal path management
• Ultra-low on-resistance optimized for minimal insertion loss in portable applications
• Single-supply operation compatible with low-voltage logic levels

Analog Switches, Multiplexers, Demultiplexers Applications

• Battery-powered handheld and portable equipment
• Cellular and mobile phones
• Portable test and measurement instruments
• Medical equipment
• Audio and video switching circuits

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix 'Z' indicates RoHS compliance and Pb-free material composition as defined by the manufacturer. Confirm the '-T' suffix corresponds to tape and reel packaging requirements. Ensure the ordering part number matches the exact package type and temperature grade specified in the official datasheet to avoid functional discrepancies.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when bidirectional switching with normally closed states is required in space-constrained designs. The 8-lead MSOP package addresses board space limitations compared to larger packages. Consider the 1.65V minimum supply voltage for ultra-low power battery applications and verify that the 300mA continuous current rating meets the load requirements.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the ISL43L12X family, which includes the ISL43L120 (normally open) and ISL43L122 (mixed NO/NC). The ISL43L121 specifically provides two normally closed switches. The family is designed for low voltage, high-speed analog switching applications requiring precision and low power consumption.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The ISL43L121IRZ serves as a direct replacement offering the same functionality in an 8-lead 3x3 TDFN package instead of MSOP. Verify pinout compatibility and thermal characteristics when substituting between MSOP and TDFN packages.