The HMC110 chip is a 5-bit digital attenuator with a 31 dB range in 1 dB steps. Each bit is activated by applying 0V to port A and disabled with -5 V to port A. Port B (as applicable) is biased with the complement of port A. Applications include military ECM and communications as well as commercial microwave radios. See SMT packaged versions; HMC110G16 (hermetic) and HMC110C14 (non hermetic).