The UCC561 low-voltage differential (LVD) regulator set is designed to provide the correct references voltages and bias currents for LVD termination resistor networks (475 ). The device also provides a 1.3-V output for "diff sense" signaling. With the proper resistor network, the UCC561 solution meets the common mode bias impedance, differential bias, and termination impedance requirements of SPI-2 (Ultra2), SPI-3 (Ultra3/Ultra160) and SPI-4 (Ultra320). The UCC561 is not intended for SPI-5 applications.
This device incorporates into a single monolith, two sink/source reference voltage regulators, a 1.3-V buffered output and protection features. The protection features include thermal shutdown and active current-limiting circuitry.
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