This part is a kind of semiconductor called LF353.

Function of this product has Wide Bandwidth Dual JFET Input Operational Amplifier.

Manufacturers : National Semiconductor

Image and pinout :

Some of the text within the PDF file :

LF353 Wide Bandwidth Dual JFET Input Operational Amplifier December 2003 LF353 Wide Bandwidth Dual JFET Input Operational Amplifier General Description These devices are low cost, high speed, dual JFET input operational amplifiers with an internally trimmed input offset voltage (BI-FET II™ technology). They require low supply current yet maintain a large gain bandwidth product and fast slew rate. In addition, well matched high voltage JFET input devices provide very low input bias and offset currents. The LF353 is pin compatible with the standard LM1558 allowing designers to immediately upgrade the overall performance of existing LM1558 and LM358 designs. These amplifiers may be used in applications such as high speed integrators, fast D/A converters, sample and hold circuits and many [ ... ]

LF353 PDF Datasheet Download