BUS-8559

www.DataSheet4U.com BUS-8559 VARIABLE OUTPUT MIL-STD-1553 TRANSCEIVER FEATURES coupled to the data bus with the specified transformer*, and isolated (on the data side) with two 55 Ω fault isolation resistors, and loaded with two 70 Ω terminations (plus additional receivers), the data bus signal produced is a nominal 0 to 7.5 V pk-pk when measured at the output side of the 55 Ω resistors. When both DATA and DATA, inputs are held low or high, the transmitter presents a high impedance to the line. An external inhibit input is also provided, which allows the the transmitter output to be removed from the line.. When a logic “1” is applied to the TX INHIBIT input, the transmitter is disabled, and the data inputs are ignored. DESCRIPTION Designed specifically for use in automatic test equipment where a variable transmitter output level is required, the DDC Model BUS-8559 transceiver is a complete transmitter and receiver conforming to MIL standards 1553A and 1553B. The receiver section accepts phasemodulated bipolar data at the input and produces a bi-phase TTL signal at the output, see FIGURE 1. Outputs, DATA and DATA, are positive and negative excursions of the input beyond an internally fixed threshold. The positive and negative thresholds are internally set at the factory for a nominal 1 V pk-pk signal, when measured at point “A” in FIGURE 2. An external strobe input is provided which allows the the receiver to be removed from the line. A logic “0” applied to RECEIVER STROBE w...