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Allegro MicroSystems, Inc. Announces New General-Purpose
Latches For Non-Automotive Applications
Small, Robust Packages with Reverse Battery Protection 
Worcester, MA – June 3, 2008 — Allegro® has released two new temperature-stable and stress-resistant Hall-effect latches, especially suited for operation in consumer and industrial products. Superior high-temperature performance is made possible through Dynamic Offset Cancellation, which reduces the residual offset voltage normally caused by device package overmolding, temperature dependencies, and thermal stress. The two devices are targeted at non-automotive applications and are identical except for their magnetic switchpoints.
Both devices include, on a single silicon chip, a voltage regulator, a Hall-voltage transducer, a small-signal amplifier, chopper stabilization, a Schmitt trigger, and a short-circuit protected open-collector output to sink up to 25 mA. A south polarity magnetic field of sufficient strength is required to turn the output on. A north polarity field of sufficient strength is necessary to turn the output off. An onboard regulator permits operation with supply voltages in the range of 4.2 to 24 volts with an operating temperature range of -40°C to 125°C.
Allegro’s A3290 and A3291 devices are available in a three-lead single in-line package (UA) and a SOT-23W surface mount package (LH).
About Allegro
Allegro MicroSystems, Inc. is a leader in developing, manufacturing and marketing high-performance power and Hall-effect sensor integrated circuits. Allegro's innovative solutions serve high-growth applications within the automotive, communications, computer/office automation, consumer and industrial markets. Allegro is headquartered in Worcester, Massachusetts (USA) with design and applications centers located in North and South America, Asia, and Europe. Further information about Allegro can be found at www.allegromicro.com.
Editorial Contact:
Stephanie Fennelly
Director - Marketing Communications
Tel: (508) 854-5363
sfennelly@allegromicro.com