This part is a kind of semiconductor called AD53040.

Function of this product has Ultrahigh Speed Pin Driver.

Manufacturers : Analog Devices

Image and pinout :

Some of the text within the PDF file :

a FEATURES 500 MHz Driver Operation Driver Inhibit Function 100 ps Edge Matching Guaranteed Industry Specifications 50 ⍀ Output Impedance >1.5 V/ns Slew Rate Variable Output Voltages for ECL, TTL and CMOS High Speed Differential Inputs for Maximum Flexibility Ultrasmall 20-Lead SOP Package with Built-In Heat Sink APPLICATIONS Automatic Test Equipment Semiconductor Test Systems Board Test Systems Instrumentation and Characterization Equipment Ultrahigh Speed Pin Driver with Inhibit Mode AD53040 FUNCTIONAL BLOCK DIAGRAM VCC VCC VEE VEE VH DATA DATA INH INH VL DRIVER AD53040 50⍀ 1.0␮A/K 39nF 39nF VHDCPL VOUT VLDCPL TVCC THERM GND GND GND GND GND PRODUCT DESCRIPTION The AD53040 is a complete high speed pin driver designed for use in digital or mixed-signal test systems. Combi [ ... ]

AD53040 PDF Datasheet Download