SY100S355

The SY100S355 offers four transparent latches with differential outputs and is designed for use in highperformance ECL systems. The Select inputs (S0, S1) select one of the two sources of input data (D0 or D1) to the latch. The Select inputs can also force the outputs to a logic LOW when the latch is in the transparent mode. The latches are in the transparent mode when both Enables (E1, E2) are at a logic LOW state. In the transparent mode, the Select inputs can pass an input logic HIGH from D0 or D1 to the output.

If the Select inputs of SY100S355 are tied together, then input data from either D0 or D1 is always passed through. A rising edge on either Enable input will latch the outputs with the most recent data at the latch inputs being stored. The Master Reset (MR) input overrides all other inputs and takes the Q outputs to a logic LOW. The inputs on this device have 75KΩ pull-down resistors.