The MAX9480 includes a hybrid network and two lownoise, fixed-gain-of-4.6V/V receive amplifiers. The part is designed to recover the receive signal to the same level as that of a conventional line interface circuit that incorporates a 1:2 transformer and standard back-matched hybrid, without degrading signal-to-noise ratio (SNR) or line-impedance sensitivity. The MAX9481 provides only the preamplifiers and buffers without the hybrid or receivers. The MAX9482 provides preamplifiers, buffers, and uncommitted receive amplifiers. All devices have a low-output-impedance shutdown function for saving power when not transmitting.