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ACT4419FP Arkusz danych(PDF) 1 Page - Aeroflex Circuit Technology |
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ACT4419FP Arkusz danych(HTML) 1 Page - Aeroflex Circuit Technology |
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1 / 6 page  CIRCUIT TECHNOLOGY www.aeroflex.com eroflex Circuit T echnology – Data Bus Modules For The Future © SCD4419 REV B 10/21/99 Features • First fully monolithic 5V only Variable Amplitude Transceiver • Lowest standby power • Transceiver meets military data bus requirements, MIL-STD-1553 and MIL-STD-1760 • Low power dissipation at full output power • Single +5V power supply • Current source output • Monolithic construction using dielectrically isolated(D.I.) • Processed and screened to MIL-STD-883 specs • Radiation Hard to 2.5 MRADS Total Dose • DESC SMD pending • Either 5V or 10V DC control line (Factory Set) General Description The Aeroflex Circuit Technology model ACT4419 is a next generation D.I. monolithic transceiver which provides variable amplitude in full compliance with MIL-STD-1553/1760 data bus requirements with the lowest standby power consumption available and one power supply operation. The model ACT4419 performs the front-end analog function of inputting and outputting data through a transformer to a MIL-STD-1553/1760 data bus. Design of these transceivers reflects particular attention to active filter performance. This results in low bit and word error rate with superior waveform purity and minimal zero crossover distortion. Efficient transmitter electrical and thermal design provides low internal power dissipation and heat rise at high as well as low duty cycles. Variable amplitude is adjusted with factory preset 0 - 10 Vdc or 0 - 5 Vdc control line at 1mA maximum input current. Transmitter The Transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a primary grounded center tap 1:2.5 transformer, isolated on the data bus side with two 52.5 Ohm fault isolation resistors, and loaded by two 70 Ohm terminations plus additional receivers, the data bus signal produced is 7.5Volts nominal P-P at A-A’ (See Figure 5). When both DATA and DATA inputs are held low or high, the transmitter output becomes a high impedance and is “removed” from the line. In addition, an Block Diagram ACT4419FP & ACT4419 Plug In Transceivers SHAPING OUTPUT STAGE COMP. COMP. REFERENCE ACTIVE FILTER INPUT AMP DRIVER TX DATA IN TX DATA IN TX INHIBIT +5 V STROBE TX/RX TX/RX RX DATA OUT RX DATA OUT GROUND for MIL-STD-1553 Single Supply Variable Amplitude Transceivers ACT4419 Preliminary |
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