Vishay's New Ultra-High-Precision, Surface-Mount Bulk Metal® Z Foil Flip Chip Resistors Are First to Combine Power Ratings up to 750 mW, Long-Term Stability Down to ±0.005 %, and Typical TCR of ±0.2 ppm/°C

MALVERN, Pa. — January 18, 2006 — Vishay Intertechnology, Inc. (NYSE: VSH) today announced the release of the VFCP series of ultra-high-precision, surface-mount Bulk Metal® Z Foil (BMZF) resistors in a flip chip configuration that provides an outstanding power to size ratio. The five new VFCP resistors are the industry's first in a flip chip design to combine high power ratings up to 750 mW at 70 °C with long-term stability down to ±0.005 %, very low typical TCR of ±0.2 ppm/°C, excellent PCR of ±5 ppm typical at rated power, and tight tolerance of ±0.01 %.

These new resistors are designed for applications in which ultra-precise, ultra-stable, ultra-reliable resistors with an extremely low total error budget are required under load and extreme environmental conditions. The wide range of intended end products include automatic test equipment; high-precision instrumentation; laboratory, industrial, and medical equipment; high-end audio gear; electron beam scanning and recording equipment including electron microscopes; and military, space, airborne, and downhole instruments and communications systems. The 35 % space savings realized by using the VFCP series flip chip design over wrap-around designs enables more compact end products.

Vishay's revolutionary BMZF technology provides a significant reduction of the resistive component's sensitivity to ambient temperature variations (TCR) and applied power changes (PCR). This breakthrough level of stability, more than an order of magnitude better than that offered by thin film technology, allows designers to guarantee a high degree of accuracy in fixed-resistor applications.

The VFCP series consists of resistors in five surface-mountable case sizes — 0805, 1206, 1506, 2010, and 2512 — with a range of maximum power ratings from 100 mW to 750 mW and resistance ratings from 10 Ω to 150 kΩ, with even lower and higher resistance values available by request. The resistors achieve excellent load-life stability of ±0.01 % at maximum power, and even greater stability of ±0.005 % at decreased power.

New Vishay Surface-Mount Bulk Metal® Z Foil Flip Chip Resistors: Summary Table

Chip Size	Maximum Power @ 70 °C	Maximum Change in Resistance	Resistance Range (ohms)	Physical Dimensions
0805	100 mW	±0.005% @ 50 mW ±0.01% @ 100 mW	10 to 12,000 Ω	0.079 x 0.049 x 0.025 in. 2.01 x 1.25 x 0.64 mm
1206	250 mW	±0.005% @ 150 mW ±0.01% @ 250 mW	10 to 30,000 Ω	0.126 x 0.062 x 0.025 in. 3.20 x 1.57 x 0.64 mm
1506	300 mW	±0.005% @ 150 mW ±0.01% @ 300 mW	10 to 40,000 Ω	0.150 x 0.062 x 0.025 in. 3.81 x 1.57 x 0.64 mm
2010	500 mW	±0.005% @ 200 mW ±0.01% @ 400 mW	10 to 100,000 Ω	0.200 x 0.100 x 0.025 in. 5.08 x 2.54 x 0.64 mm
2512	750 mW	±0.005% @ 500 mW ±0.01% @ 750 mW	10 to 150,000 Ω	0.250 x 0.126 x 0.025 in. 6.35 x 3.20 x 0.64 mm

Additional featured specifications include a low thermal EMF of less than 0.05 µV/°C, voltage coefficient below 0.1 ppm/V, inductance lower than 0.08 µH, and response time faster than 1 ns. The noise generated by these resistors is less than -40 dB, or essentially noise-free.

Both lead (Pb)-free and tin/lead alloy terminal finishes are available, and matched resistor sets can be provided by request. Vishay's application engineering department is available to advise customers and make recommendations for non-standard technical requirements and special applications.

Available in waffle-pack and tape-and-reel packaging, samples and production quantities of the VFCP series of resistors are available now. Lead time for production quantities is four to six weeks, and less on request.

Vishay Intertechnology, Inc., a Fortune 1,000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers of discrete semiconductors (diodes, rectifiers, transistors, and optoelectronics and selected ICs) and passive electronic components (resistors, capacitors, inductors, sensors, and transducers). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, and medical markets. Its product innovations, successful acquisition strategy, and ability to provide "one-stop shop" service have made Vishay a global industry leader. Vishay can be found on the Internet at http://www.vishay.com.

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Bulk Metal is a registered trademark of Vishay Intertechnology, Inc.