ACT4487 Datasheet | Aeroflex Circuit Technology

Standard Products ACT4487 Single Transceiver for MIL-STD-1553A/B, MIL-STD-1760 & SAE-AS15531 .aeroflex./Avionics February 14, 2008 Features ❑ Small size, light weight and low power dissipation, single transceiver ❑ +5V / ±15V DC power supply operation ❑ Outstanding MIL-STD-1553 / SAE-AS15531 performance ❑ Monolithic construction ❑ Input and output TTL patible design ❑ Designed for mercial, industrial and aerospace applications ❑ MIL-PRF-38534 pliant devices available ❑ Aeroflex-Plainview is a Class H & K MIL-PRF-38534 manufacturer GENERAL DESCRIPTION The Aeroflex-Plainview ACT4487 is the next generation monolithic transceiver design which provides full pliance with MIL-STD-1553A/B, MIL-STD-1760 and meets SAE-AS15531 requirements in the smallest package with lower pin count for those designs with less board space. The ACT4487 performs the front-end analog function of inputting and outputting data through a transformer to the MIL-STD-1553 data bus. Design of this transceiver 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. TRANSMITTER The transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1.4:1 ratio transformer the data bus signal is typically 7.5 Volts P-P at Point A (See Figure 5). When both DATA and DATA inputs are held low or high, the transmitter output bees a high impedance and is “removed” from the line. In addition, an overriding “INHIBIT input provides for the removal of the transmitter output from the line. A logic “1” applied to the “INHIBIT” takes priority over the condition of the data inputs and disables the transmitter (See Figure 1 Transmitter Logic Waveform). The Transmitter may be safely operated for an indefinite...