(redirected from 1394b)
Also found in: Dictionary.


(computer science)



Officially the IEEE 1394 High Performance Serial Bus (HPSB), FireWire is a high-speed interface mostly developed and promoted by Apple for video transmission. Introduced in 2000, FireWire was added to camcorders and a variety of A/V equipment. Even early iPods could connect via FireWire. Still included on Mac laptop and desktop computers, modern camcorders have replaced FireWire with USB, HDMI and other video outputs.

FireWire 400 and 800
FireWire 400 is limited to a distance of 4.5 meters. In 2003, FireWire 800 increased the range to 100 meters and doubled the transfer rate. FireWire supports 63 devices, real-time data transfer, hot swapping and simultaneous multiple speeds. The faster 1600 and 3200 versions never got into production.


  FW400     400 Mbps

  1394b - 100 METER CABLE LENGTH

  FW800     800 Mbps
  FW1600   1600 Mbps
  FW3200   3200 Mbps

FireWire Sockets and Compatibility
FW800 is backward compatible with FW400. One end of a "bilingual cable" has an FW800 plug, while the other end is FW400. Sony's i.Link is a miniaturized socket that connects to cables with i.Link, FW400 or FW800 at the other end.

Easy to Tell
FireWire cables are easily distinguished from their USB counterparts.

Dual Mode FW/USB
This external hard drive can connect to the computer via FireWire or USB, whichever cable is plugged in.
References in periodicals archive ?
With Agere's solution, PC manufacturers can offer cost-effective 1394A and 1394B using one mainboard design.
Leading developers and suppliers will demonstrate products that use 1394b, which provides 800 Megabit/second performance and has become a popular standard worldwide in a broad range of applications.
PC manufacturers are looking for cost-effective ways to implement 1394B on the main board.
In addition, there is an effort now to increase the speed and bandwidth for video data transfer from the 800 Megabit/second provided by 1394b, to 1.
Further expanding the largest 1394b portfolio in the industry, the introduction of the TSB83AA22ZAJ open-host controller interface (OHCI) 1394b Link/PHY will give designers the ability to build devices using a 1394b Link and PHY layer on the same chip.
It features cable bus power for transferring power over the Cat5/5e/6 cable and has industrial standard screw locking for both RJ45 and 1394b 9-pin ports.
FireTrac provides a dedicated, high-performance & cost-effective solution for 1394b data logging & monitoring solutions," says Jan de Vries, CEO of DapTechnology.
The MB88387 incorporates both the 1394b PHY and Link in a single chip, along with the digital transmission content protection (DTCP) standard that prohibits unauthorized copying or transmission of protected A/V content.
Software availability and support for 1394b has been one of the key barriers to rapid market adoption of this high-performance serial bus, and we have now eliminated that barrier," said Zephra Freeman, marketing manager, PC connectivity, TI.
PLX continues to see strong demand for its 1394b line of storage controllers through 2010 and beyond, even with the rollout of the new USB SuperSpeed standard, because consumers demand peripherals that are supported freely in the current installed base," said James Tout, Vice President of Storage Engineering, PLX Technology.
The new high-speed chipset architecture, capable of surpassing one Gigabit, presents CE manufacturers with DVI, HDMI and 1394b cable replacement opportunities for interconnectivity of high-end multimedia devices and wireless streaming of HDTV.