Thin-Film, Center-Tapped Resistors Provide <0.1 pF Shunt Capacitance, -20-dB Low-Noise Operation for High Performance in Test and Measurement Systems

MALVERN, PENNSYLVANIA - April 25, 2003 - A new thin-film, center-tapped, dual-value resistor that enables more flexible hybrid circuit designs was announced today by Vishay Intertechnology, Inc. (NYSE: VSH).

The CTQ resistor chip, which measures just 0.030 in. by 0.030 in., provides low shunt capacitance of <0.1 pF and low-noise operation for high performance in hybrid circuits for test and measurement systems.

The versatile new resistor chip from Vishay Electro-Films gives the user three value choices – total value, one-half value, or one-quarter value – depending on the wire-bond configuration, while six bonding pads enhance layout flexibility.

Each CTQ chip manufactured through Vishay's sophisticated thin-film manufacturing process features a high-stability, self-passivating and moisture-resistant tantalum nitride resistor element and a quartz substrate.

CTQ resistors offer a wide resistance range of 10 W to 1 MW, and at lower power levels can provide lower shunt capacitance than is available in silicon-based resistors. Tight tolerance values down to 0.1% are available, with TCR values from ±25 ppm/°C to ±100 ppm/°C. TCR tracking between resistor halves is ±2 ppm/°C, and center tap ratio tolerance is available to ±0.1%. The resistor features a typical noise figure of –35 dB in a 100ΩW to 250ΩkW range and just –20 dB at values <100 Ω or >251 kΩ. The new device provides a maximum operating voltage of 200 V, a dielectric breakdown voltage of 400 V, and a 60ΩmW DC power rating at +70°C.

Electrically tested and visually inspected to MIL-STD-883, CTQ resistors feature resistance to thermal shock and high-temperature exposure and are specified for an operating temperature range of –55°C to +125°C. They are suitable for use with other Vishay products including wire-bondable capacitor chips, inductor chips, user-trim resistor chips, and other quartz parts such as QFM, QFN, and QFX single-value resistor chips.

Samples of the CTQ resistor chips are available now, with lead times of 14 weeks for production quantities.

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.