There is a Attenuator in the UltraCMOS® series.There is a Strip solid enclosure around the optical attenuator.The RF Attenuator is convenient to ship overseas because it is packed in a 20-WFQFN Exposed Pad.You can find the functions of the 20 pins in the RF Attenuator.Test statistics indicate that the minimum operating temperature of the Attenuator would be -40°C.The RF Attenuator should not operate in an environment where the temperature is higher than 85°C.