Hall-Effect Latches suit non-automotive applications.

Press Release Summary:

Offered in reverse battery protected packages, temperature-stable and stress-resistant latches have dynamic offset cancellation that reduces residual offset voltage. On single silicon chip, Models A3290 and A3291 include Hall-voltage transducer, small-signal amplifier, chopper stabilization, Schmitt trigger, and short-circuit protected open-collector output to sink up to 25 mA. Onboard regulator allows operation with 4.2-24 V supply voltages with -40 to 125°C operating temperatures.

Original Press Release:

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 MicroSystems, Inc. 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). The A329xKLHLT-T is priced at $0.44 and the A329xKUA-T is priced at $0.46 both in quantities of 1,000. They both have a 12 - 14 week typical lead-time to market.

About Allegro

Allegro MicroSystems, Inc. is leader in developing, manufacturing and marketing high-performance power integrated circuits and integrated Hall-effect magnetic sensors. Allegro's innovative solutions serve high-growth applications within the automotive, communications, computer/office automation, consumer and industrial markets. Allegro is headquartered in Worchester, Massachusetts (USA) with design and applications center located in North and South America, Asia, and Europe. Further information about Allegro can be found at www.allegromicro.com.

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