This part is a kind of semiconductor called PJ431A.

Function of this product has (PJ431x) Programmable Precision References.

Manufacturers : Promax-Johnton

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PJ431/PJ431A/PJ431B Programmable Precision References diodes in many applications such as digital voltmeters, power supplies , and op amp circuitry. The 2.5 volt reference makes it convenient to obtain a stable reference from 5.0 volt logic supplies, and since The PJ431, A, B operates as a shunt regulator, it can be used as either a positive or negative tage reference. IC voltage references operate as a low temperature coefficient zener which is programmable from Vref to 36 volts with two external resistors. These devices exhibit a wide operating current range of 1.0 to 100mA with a impedance typical dynamic these of 0.22Ω. The characteristics of T he PJ431, A, B integrated circuits are three-terminal programmable shunt regulator diodes. These monolithic referenc [ ... ]

PJ431A PDF Datasheet Download