Science & Technology
Science and Technology
Science and Technology 
Mon, July 20, 2009
Sun, July 19, 2009
Fri, July 17, 2009
Intersil: Intersil's New Triple Analog Video Delay Lines Offer Highest Bandwidth and Video Resolution With Longest Transmission
MILPITAS, CA--(Marketwire - July 17, 2009) - [ Intersil Corporation ] (
The ISL59920, ISL59921, ISL59922, and ISL59923 are triple analog delay lines that provide skew compensation between three high-speed signals. These parts are ideal for compensating for the skew introduced by a typical CAT-5, CAT-6 or CAT-7 cable (with differing electrical lengths on each twisted pair) when transmitting analog video.
Intersil's triple analog video delay lines enable users to meet a variety of bandwidth and transmission-length requirements using a single cost-effective design solution.
The whole family is footprint-compatible with Intersil's own EL9115, which was the industry's first-ever silicon delay line product. Now users have a choice of bandwidths, ranging from 150MHz up to 230MHz, which increases the range of video resolutions that can be handled up to UXGA and 1080p. The new family also has a greatly reduced offset of just +/-25mV.
The [ ISL59920 ] features up to 62ns of delay compensation in 2ns steps, with a bandwidth of 153 MHz. This is usually sufficient to compensate for the skew encountered in 1000 feet (300m) of CAT 5/6/7 cable.
Users needing higher-bandwidth solutions over shorter distances may opt for the [ ISL59921 ] or [ ISL59922 ], which feature 200MHz or 230MHz -3dB bandwidth (typ), respectively.
The [ ISL59923 ] has bandwidth of 153MHz with 30ns of total delay and is therefore ideally suited for shorter reach, lower resolution installations.
Using a simple serial interface, the ISL59920, ISL59921, ISL59922, and ISL59923 delays are programmable in steps of 2, 1.5, 1, or 2ns (respectively) for up to a total delay of 62, 46.5, 31, or 30ns (respectively) on each channel. The gain of the video amplifiers can be set to x1 (0dB) or x2 (6dB) for back-termination.
Delay lines solve the skew problem encountered when RGB video (often from a VGA source, such as a computer) is sent over twisted pair cables. CAT-5 (also CAT-6, or 7). Cables contain 4 pairs of wires, which are twisted together at different rates. This means that they are actually different physical lengths. When a red-green-blue (RGB) signal travels down a CAT-5 cable, each color is carried on a different pair. Because the pairs are different lengths, the colors that make up a single pixel arrive at different times, so the images are not on top of one another. The triple delay line enables the designer to slow down the fastest two colors so that all three colors arrive simultaneously. The result is a sharp, clear image.
Packaging, Pricing and Availability
These products are available in 20-lead 5mmx5mm QFN packages. The ISL59920 is priced at $20.11 in 1000-unit quantities. The ISL59921 is priced at $22.00; the ISL59922 is priced at $25.00 and the ISL59923 is priced at $16.43.
To view a high-resolution downloadable photo, please visit Intersil's photo room at: [ http://www.intersil.com/pressroom/photoarchives.asp ].
About Intersil
[ Intersil Corporation ] is a leader in the design and manufacture of high-performance analog and mixed-signal semiconductors. The Company's products address some of the industry's fastest growing markets, such as flat panel displays, cell phones, other handheld systems, and notebooks. Intersil's product families address power management functions and analog signal processing functions. Intersil products include ICs for [ battery management ], hot-plug controllers, linear regulators, power sequencers, supervisory ICs, bridge drivers, [ PWM controllers ], switching DC/DC regulators, Zilker Labs Digital Power ICs and power MOSFET drivers; optical storage laser diode drivers; DSL line drivers; [ D2Audio ] products; [ video ] and high-performance [ operational amplifiers ]; [ high-speed data converters ]; interface ICs; [ analog switches ] and multiplexers; crosspoint switches; voice-over-IP devices; and ICs for [ military ], space and radiation-hardened applications. For more information about Intersil or to find out how to become a member of our winning team, visit the Company's web site and career page at [ www.intersil.com ].