Dallas, Tex.Aiming to cram the 1394b interface into more notebooks and PCs, Texas Instruments Inc. launched an integrated open host controller that stacks two link and physical layer (PHY) devices into a package that's less than half the size of existing 1394b silicon.
The TSB83AA22ZAJ open-host controller interface (OHCI) 1394b Link/PHY is housed in a tiny 7-mm x 7-mm µBGA package compared with its existing product, which measures 15-mm X 15-mm, according to Tom Ballew, strategic product marketing manager in TI's interface group.
"The real enhancement there is the reduction in size," he said. "It's really targeted for the notebook space, so it's in a very small package. Before, there were two separate devices that were required to do this solution. The PHY and Link were separate devices," Ballew said.
TI also introduced the TSB81BA3D single chip PHY, which contains three bilingual 1394b cable ports and is fully compatible with 1394a-2000. It supports data transfers up to 800-Mbits/s, which is nearly twice the transfer rate of USB 2.0.
Both of TI's 1394b devices are aimed to meet the growing demand for faster speeds due to larger capacity hard disk-drive storage and high-definition video transfers.
The 'b' version of the IEEE 1394 multimedia digital link standard delivers speeds starting at 800-Mbits/s, which is scalable to 1.6-Gbits/s. It is designed with architectural support to withstand data rates of 3.2-Gbits/s. It also extends the distance that FireWire-equipped devices can send video and audio to more than 100 meters over CAT-5, plastic fiber and other media. For more, go to the 1394 trade association Web site at www.1394ta.org/Technology/About/1394b.htm
TI's TSB83AA22ZAJ 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 enhanced compatibility with legacy digital video equipment, such as DV camcorders; special power-down features and low-power modes; and extra-large FIFOs for improved performance. It also has two bilingual 1394b cable ports for system configuration flexibility.
"The OHCI device is used in computers so the application gives your computer either a PC or MAC 1394b capability so you can hook it up with 1394b storage," he said.
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The 3.3-V device will have a peak power consumption of less than 600-milliwatts. It draws 128 milliamps with a 1.8-V core that consumes 75-mA, according to TI.
The TSB81BA3D provides the digital and analog transceiver functions needed to implement a three-port node in a cable-based IEEE 1394 network. Each cable port incorporates two differential line transceivers. The transceivers include circuitry to monitor the line conditions needed to determine connection status, for initialization and arbitration, and for packet reception and transmission, according to TI.
The TSB81BA3D is designed to interface with a link-layer controller (LLC). And it may also be connected cable port to cable port to an integrated 1394 Link + PHY layer. The TSB81BA3D is powered by two suppliesa 3.3-V supply for I/O and a core voltage supply.
Fully interoperable with FireWire, i.LINK and SB1394 implementations of IEEE standard 1394, the TSB81BA3D is also used in computers, add-in cards, consumer and industrial applications.
TI is also currently designing products 1394b products to support consumer electronics applications such as what is defined by HANA (High-Definition Audio Video Network Alliance). For more on HANA, click here: www.hanaalliance.org/.
Pricing for the TSB81BA3D in 1,000-unit quantities is $5.55 each. TI will not release pricing on the TSB83AA22ZAJ since it is not intended for the mass market, Ballew said.
Texas Instruments Inc., 1-972-644-5580, www.ti.com