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UT63M-147CPC Datasheet(PDF) 5 Page - Aeroflex Circuit Technology |
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UT63M-147CPC Datasheet(HTML) 5 Page - Aeroflex Circuit Technology |
5 / 20 page Appendix 2 - 5 TRANSMITTER The transmitter section accepts Manchester II biphase TTL data and converts this data into differential phase-modulated current drive. Transmitter current drivers are coupled to a MIL-STD- 1553 data bus via a transformer driven from the TXOUT and TXOUT terminals. Transmitter output terminals’ non- transmitting state is enabled by asserting TXIHB (logic “1”), or by placing both TXIN and TXIN at the same logic level. Table 1, Transmit Operating Mode, lists the functions for the output data in reference to the state of TXIHB. Figure 3 shows typical transmitter waveforms. RECEIVER The receiver section accepts biphase differential data from a MIL-STD-1553 data bus at its RXIN and RXIN inputs. The receiver converts input data to biphase Manchester II TTL format and is available for decoding at the RXOUT and RXOUT terminals. The outputs RXOUT and RXOUT represent positive and negative excursions (respectively) of the inputs RXIN and RXIN. Figure 4 shows typical receiver output waveforms. Table 1. Transmit Operating Mode Notes: 1. x = Don’t care. 2. Transmitter output terminals are in the non-transmitting mode during Off-time. 3. Transmitter output terminals are in the non-transmitting mode during Off-time, independent of TXIHB status. Figure 3. Typical Transmitter Wave Figure 4. Typical Receiver Waveforms TXIN TXIN TXIHB TXOUT x1 x 1 0 0 x 0 1 0 1 0 0 1 1 x 90% 10% TXOUT, TXOUT TXIN TXIN LINE-TO-LINE DIFFERENTIAL OUTPUT TXIN TXIHB TXIN tTXDD BOTH HIGH OR BOTH LOW RXOUT RXOUT RXOUT RXOUT LINE-TO-LINE DIFFERENTIAL INPUT tRXDD Off2 Off3 Off3 On On |
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