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ISL43L121IUZ is listed in the Analog Switches, Multiplexers, Demultiplexers range at ChipApex. The manufacturer field lists Renesas Electronics Corporation. Its product description is IC SW SPST-NCX2 250MOHM 8MSOP. Review the specifications below when checking this part for your BOM.
The ISL43L121IUZ is a dual single-pole/single-throw (SPST) analog switch from the Intersil ISL43L12X family, designed for low-voltage single-supply operation. It features two normally closed (NC) switches and operates on a supply voltage range of +1.65V to +3.6V. The device provides ultra-low ON-resistance of 0.16Ω at 3V and 0.26Ω at 1.8V, with fast switching speeds of 13ns turn-on/turn-off times at 3V. It is housed in an 8-lead MSOP package and supports an operating temperature range of -40°C to +85°C.
Verify the component authenticity by checking the manufacturer marking against the ordering information table. Confirm the package type matches the specified 8-lead MSOP format. Ensure the part number suffix corresponds to the correct lead finish and moisture sensitivity level requirements for your assembly process.
Select this component when a dual normally closed analog switch is required within a low-voltage system. The ISL43L121 differs from the ISL43L120 (normally open) and ISL43L122 (mixed NO/NC). Ensure the application signal range remains between ground and the positive supply rail to maintain proper functionality and avoid forward biasing internal protection diodes.
This device belongs to the ISL43L12X series of ultra-low ON-resistance analog switches. The family includes the ISL43L120, ISL43L121, and ISL43L122, which share identical electrical characteristics but differ in switch state configuration. These parts are engineered to address ASIC pin limitations in compact portable designs.
Publicly confirmed substitute part numbers are not available in the provided documentation.
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