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Circuit designers pressed for space should check out Micro Crystal’s newest MHz quartz crystal, the CC7A-T1A. Designed for applications in implantable medical and medical telemetry, avionics, automotive and other high-reliability markets, this precision timing crystal has a package height of 0.90mm and a footprint of only 3.2 x 1.5mm. This is the smallest size available for implantable crystals and marks an extension of the new small size line-up of implantable, high-reliable crystals of Micro Crystal. An already-released, low frequency version, covers from
30 to 500kHz and 32.768kHz and comes in the same package.

Intended for critical timing applications, the AT cut quartz crystal CC7A-T1A offers a wide temperature range, up to -40 to +85/+125°C, and a high thermal stability for medical applications (down to +/-10ppm), which meets the requirements for wireless applications. Low aging and very high 5.000g shock and vibration resistance combine to make this device ideal to meet the specifications of the high-reliable market applications. An innovative crystal design provides performance comparable to larger devices. The CC7A-T1A is RoHS compliant and 100% lead free.

Micro Crystal also offers extended custom testing screening in order to meet the requirement of cardiologic and neurostimulation applications for implantable devices, including particle detection,
X-ray scanning and others. Standard frequencies are 24.0, 26.0 and 26.5MHz, with other frequencies in the 24 to 30MHz range upon request. All frequencies are generated in fundamental mode. The crystals are supplied in special trays (170 crystals per tray). For pick-and-place equipment, the parts are available in 12 mm tapes: 7” (178 mm) reel with 3’000 crystals13” (330 mm) reel with 14’000 crystals.

Applications include: Implantable devices, pacemaker, cardiologic and neurostimulations, high reliable markets

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Intersil Corporation (NASDAQ Global Select: ISIL), a world leader in the design and manufacture of high-performance analog and mixed-signal semiconductors, today introduced four new triple analog delay lines for video signals that provide sharp, clear images for keyboard-video-mouse (KVM) applications or any video carried over long distances of inexpensive twisted-pair cable.

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 and 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 ISL59923s 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.

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Featuring built-in 20-MHz demodulation capability, the BTS Master MT8221B handheld analyzer support emerging 4G wireless network standards such as LTE and WiMAX, as well as installed 2G and 3G networks. A 30-MHz zero-span IF output permits external demodulation of other wideband signals. As an option, users can order vector signal generation capability to generate two modulated signals plus noise for receiver testing. The unit simplifies testing for key performance indicators such as dropped calls, call denial, or call-blocking rates due to a malfunction at the cell site or interference. Included software allows remote monitoring and control and easy transfer of acquired data to a computer.