BR9153S is a wideband MMIC 6-bit serial/parallel digital attenuator designed using GaAs process with a 31.5 dB attenuation control range in 0.5 dB steps over the frequency range from DC to 8GHz. The digital attenuator provides typical insertion loss less than 1.2dB, and excellent attenuation accuracy and high input linearity. The product operates with a single +5V positive supply voltage, and provides a CMOS-/TTL-compatible control interface. The device also features a user-selectable power-up state and a serial output port for cascading other serial controlled components.