The differential inputs D_, D _ can be configured to accept a single-ended signal when the unused complementary input is connected to the on-chip reference output (V BB1, V BB2). All the differential inputs have internal bias and clamping circuits that ensure a low output state when the inputs are left open. The MAX9389 operates with a wide supply range VCC VEE of 2.375V to 5.5V. The device is offered in 32-pin TQFP and thin QFN packages, and operates over the -40C to +85C extended temperature range.