ACT4480-DFI Datasheet | Aeroflex Circuit Technology

Standard Products ACT4480-DFI Dual Transceiver for H009 Specification .aeroflex./avionics February 27, 2013 Features - Dual transceiver meets Mc Donnell Douglas H009 data bus specifications - Operates with ±12V to ±15 and +5V power supplies - Monolithic construction using linear ASICs - Packaging - Low profile ceramic - 0.60''W x 0.80''L x 0.14''H - Designed for mercial, industrial and aerospace applications - Full MIL-PRF-38534 qualification pending DESCRIPTION The Aeroflex Plainview transceiver model ACT4480-DFI is a new generation monolithic transceiver which provides pliance with H009 data bus requirements using three DC power supplies operation. The dual channel ACT4480-DFI performs the front-end analog function of inputting and outputting data through a transformer to a H009 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. The active filter design provides the required H009 low harmonic distortion waveform without increasing the pulse delay characteristics significantly. Efficient transmitter electrical and thermal design provides low internal power dissipation and heat rise at high and well as low duty cycles. The receiver input threshold is set internally. TRANSMITTER The Transmitter section accepts plementary TTL data at the input, and when coupled to the data bus with a 1:1 transformer, isolated on the transceiver side with two 34 Ohm bus terminating resistors, with the bus terminated by a 175 Ohm resistor, the data bus signal produced is 20VP-P nominal at A-A' (See Figure 5). When both DATA and DATA inputs are held low or high, the transmitter output remains a low impedance and signal is “removed” from the line. In addition, an overriding “INHIBIT" input returns the output to a high impedance state. A logic “1” applied to the “INHIBIT” takes priority over the condition of the...