This part is a kind of semiconductor called AA103-72.

Function of this product has GaAs IC 1 Bit Digital Attenuator 10 dB LSB DC-2.5 GHz.

Manufacturers : Alpha Industries

Image and pinout :

Some of the text within the PDF file :

GaAs IC 1 Bit Digital Attenuator 10 dB LSB DC–2.5 GHz AA103-72 Features s Attenuation Cutback of 10 dB s Single Positive 3 V Control s Low Loss s Low Cost SOT-5 Plastic Package PIN 1 0.020 (0.51 mm) 0.014 (0.35 mm) 0.012 (0.30 mm) 0.000 (0.00 mm) MIN. 0.064 (1.63 mm) 0.035 (0.90 mm) SOT-5 0.074 (1.90 mm) REF. 0.069 (1.75 mm) 0.052 (1.30 mm) 0.118 (3.00 mm) 0.087 (2.20 mm) Description The AA103-72 is a 1 bit GaAs IC FET digital attenuator in a low cost package. This attenuator has an LSB of 10 dB. The AA103-72 is particularly suited where high attenuation accuracy, low insertion loss and low intermodulation products are required. Typical applications include cellular radio, wireless data, and wireless local loop gain level control circuits. 0.037 (0.95 mm) REF. 0.012 (0.30 mm) TYP. 0.0 [ ... ]

AA103-72 PDF Datasheet Download