This part is a kind of semiconductor called AD53509.

Function of this product has High-Performance Driver/Comparator Active Load on a Single Chip.

Manufacturers : Analog Devices

Image and pinout :

Some of the text within the PDF file :

High Performance Driver/Comparator, Active Load on a Single Chip AD53509 FEATURES 250 MHz operation Driver/comparator and active load included On-chip Schottky diode bridge 52-lead LQFP_EP package APPLICATIONS Automatic test equipment (ATE) Semiconductor test systems Board test systems Instrumentation and characterization equipment GENERAL DESCRIPTION The AD53509 is a single chip that performs the pin electronics functions of driver, comparator, and active load in ATE VLSI and memory testers. In addition, a Schottky diode bridge for the active load and a VCOM buffer are included internally. The driver is a proprietary design that features three active states: data high mode, data low mode, and term mode as well as an inhibit state. The output voltage range is −2 V to +7 V to accommodate [ ... ]

AD53509 PDF Datasheet Download