The ASL 3004 from Aelius Semiconductors is a RF Variable Attenuator with Frequency 500 MHz to 1500 MHz GHz, Attenuation Range 31.5 dB, Attenuation Step 0.5 dB, Power 0.1 W, Insertion Loss 4 dB. Tags: Die, Programmable, Digital. More details for ASL 3004 can be seen below.