Mission Viejo, CA (December 16, 2015) - Holt Integrated Circuits today announced the introduction of HI-1585, the first MIL-STD-1553 dual transceiver with tail-off compensation. MIL-STD-1553 bus tail-off or offset is a transmitter-induced phenomenon caused by imbalance in the transmit signal path. It causes a temporary DC offset on the terminal’s bus stub which can temporarily impair the terminal’s ability to decode received commands following transmission of long messages.
The device provides two options to compensate for transmitter-induced tail-off, namely input data synchronization and programmable tail-off adjustment. The former enables a clocked input for the logic-level transmit signal pair to provide precise synchronization and mitigate input signal timing differences. The latter option provides a means for digitally tuning tail-off characteristics for problem designs that fail to meet “output symmetry” (tail-off) requirements, usually a result of non-optimal board design and layout. Compensation is pin-selected and bus-specific. Three adjustment levels are provided for either polarity, reducing tail-off amplitude up to ±100 mV DC.
In addition to bus tail-off compensation, the HI-1585 also has an optional receiver output pulse extension. This ensures minimum receive output pulsewidth of 300ns, even when the receiver differential input signals are close to the MIL-STD-1553 minimum receiver input response amplitude of 860mVpp for a transformer-coupled bus.
“Bus tail-off is often an undesirable side effect of board design, arising from layout space constraints or other unavoidable physical attributes,” said George Noh, Director of Sales and Marketing at Holt. “Providing a means to compensate for bus tail-off enables our customers to avoid expensive board redesigns and post-qualification modifications.”
The HI-1585 is packaged in the industries smallest MIL-STD-1553 transceiver package, a 48-pin plastic 6 x 6mm QFN with an exposed heat sink pad, which may be soldered to the PCB ground plane for optimal thermal dissipation. The device is available in industrial −40oC to +85oC and extended −55oC to +125oC temperatures, with optional burn-in available on the extended temperature range.
To request information on Holt’s ARINC 429, CAN (ARINC 825), MIL-STD-1553 and other product lines, readers should contact Holt at (949) 859-8800, by e-mail at info@holtic.com, or visit the Holt website at www.holtic.com.
About Holt Integrated Circuits
Located in Mission Viejo, CA, Holt Integrated Circuits is a major supplier of ICs for avionics and military data bus and display applications. The company’s products are specified by more than 400 manufacturers worldwide and are employed in flight control, navigation, engine management, communications, safety equipment, and in-flight entertainment systems.
Holt’s range of ICs supporting the ARINC 429 standard is the widest in the industry and its MIL-STD-1553 transceivers are recognized as the industry’s smallest, having the lowest power consumption. In addition, Holt MIL-STD-1553 integrated terminals offer the most compact, cost effective solution available, integrating protocol, transceiver and transformers in a single 16x16mm package. Other data bus products include ARINC 717, CAN (ARINC 825), RS-485/422 and analog switches. Select products are available to DSCC SMD specifications. Holt also offers product compliant to the European Union "RoHS Directive 002/95/EC".
Holt Integrated Circuits is ISO 9001:2008 registered and is a STACK certified supplier and recipient of the STACK International 2012 Gold Supplier Award.
