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Micropower Hall Switches From Diodes Incorporated Raise Detection Circuit Performance

Diodes Incorporated (Nasdaq: DIOD), a leading global manufacturer and supplier of high-quality application specific standard products within the broad discrete, logic and analog semiconductor markets, today introduced a pair of high-sensitivity, micropower devices, extending its family of Hall effect switches. Bringing greater design flexibility and savings in both power and space, the AH1902 and AH1903 help raise the performance bar of a wide range of contact-less switch applications in consumer, domestic, office and industrial products.

The AH1902 is an omnipolar device, detecting both north and south magnetic fields. In default mode, the programmable AH1903 operates as a unipolar device, detecting a south pole at the part-marked package surface. The device also offers an omnipolar mode, enabling it to meet the needs of multiple applications and to be changed ‘on the fly’ in the event of a field direction issue. The AH1903 function is changed using a simple select pin, driven by an external logic source or microcontroller.

The high sensitivity of both switches means weaker magnets can be employed or detection distances extended; the switches’ typical operating threshold switch point is ±35G.

Designed to be used with a low voltage supply, these latest Hall switches from Diodes Incorporated operate over the 1.6V to 3.6V voltage range. This characteristic, coupled with an integral sleep function and a typical current consumption of 4.3µA, makes them well-suited for battery-powered applications.

To aid product miniaturization, the switches are provided in a variety of space-saving, low-profile, surface-mount packages. The omnipolar AH1902 comes in the DFN1216-4, the ultra-thin DFN2015-6 and SOT553 packages. The AH1903 is available in the 1.2x1.6x0.5mm DFN1216-4 package, making it the industry’s smallest omnipolar/unipolar programmable Hall switch.

To accommodate a wide range of hand-held applications, these high-reliability switches have an 8kV electrostatic discharge withstand capability and offer good immunity to RF noise and other circuit stresses. Operating and release points are also highly stable over the -40ºC to +85ºC temperature range, and with a very low temperature coefficient, the switches are immune to early or late switching. For further information, visit the Company’s website at www.diodes.com.

About Diodes Incorporated

Diodes Incorporated (Nasdaq: DIOD), a Standard and Poor’s SmallCap 600 and Russell 3000 Index company, is a leading global manufacturer and supplier of high-quality application specific standard products within the broad discrete, logic and analog semiconductor markets. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets. Diodes’ products include diodes, rectifiers, transistors, MOSFETs, protection devices, functional specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors; power management devices, including LED drivers, AC-DC converters and controllers, DC-DC switching and linear voltage regulators, and voltage references along with special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers. Diodes’ corporate headquarters, logistics center, and Americas’ sales office are located in Plano, Texas. Design, marketing, and engineering centers are located in Plano; San Jose, California; Taipei, Taiwan; Manchester, England; and Neuhaus, Germany. Diodes’ wafer fabrication facilities are located in Kansas City, Missouri and Manchester, with two more located in Shanghai, China. In addition, two assembly-test facilities are located in Shanghai; two are located in Chengdu, China, with one in Neuhaus and one in Taipei. Additional engineering, sales, warehouse, and logistics offices are located in Fort Worth, Texas; Taipei; Hong Kong; Manchester; Shanghai; Shenzhen, China; Seongnam-si, South Korea; Suwon, South Korea; Tokyo, Japan; and Munich, Germany, with support offices throughout the world. For further information, including SEC filings, visit Diodes’ website at http://www.diodes.com.

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