Quad Varafet Analog Switch

The IH401A is made up of 4 monolithically constructed combinations of varacitor type Diode and a N-Channel JFET The JFET itself is very similar to the popular 2N4391 and the driver Diode is specially designed, such that its capacitance is a strong function of the voltage across it. The driver Diode is electrically in series with the Gate of the N-Channel FET and simulates a back-to-back Diode structure. This structure is needed to prevent forward biasing the source-to-gate or drain-to-gate junctions of the JFET when used in switching applications. Previous applications of JFETs required the addition of Diodes in series with the Gate and then perhaps a gate-to- source referral resistor or a capacitor in parallel with the diode; therefore, at least 3 components were required to perform the Switch function. The IH401A does this same job in one component (with a great deal better performance characteristics). By Intersil Corporation
IH401A 's PackagesIH401A 's pdf datasheet

IH401A Pinout, Pinouts
IH401A pinout,Pin out
This is one package pinout of IH401A,If you need more pinouts please download IH401A's pdf datasheet.

IH401A Application circuits
IH401A circuits
This is one application circuit of IH401A,If you need more circuits,please download IH401A's pdf datasheet.

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