This part is a kind of semiconductor called AT-283-PIN.
Function of this product has Digital Attenuator 15.5 dB 5-Bit TTL Driver DC-2.0 GHz.
Manufacturers : M/A-COM Technology Solutions
Image and pinout :
Some of the text within the PDF file :
AT-283-PIN Digital Attenuator 15.5 dB, 5-Bit, TTL Driver, DC-2.0 GHz Features • Attenuation: 0.5 dB Steps to 15.5 dB • Temperature Stability: ± 0.18 dB from –55°C to +85°C Typical • Low DC Power Consumption • Hermetic Surface Mount Package • Integral TTL Driver • 50 Ω Nominal Impedance • Lead-Free CR-12 Package • 260°C Reflow Compatible • RoHS* Compliant Rev. V7 Functional Schematic Description M/A-COM’s AT-283-PIN is a GaAs FET 5-bit digital attenuator with a 0.5 dB minimum step size and 15.5 dB total attenuation. This attenuator and integral TTL driver is in a hermetically sealed ceramic 16 lead surface mount package. The AT-283-PIN is ideally suited for use where accuracy, fast switching, very low power consumption and low intermodulation products are requi [ ... ]