Hall-Effect Switches feature latched digital output.
Press Release Summary:
Models A3213 and A3214 micropower, omnipolar digital switches have nominal current consumption of 300 µA and 5 µA respectively, and operate from battery voltages of 2.4-5.5 V. Model A3212 for 2.5-3.5 V operation is offered in ultra-slim micro lead-frame package measuring 0.75 mm high x 2 mm long and 3 mm wide. All switches are suited to detection of open/closed positions in battery-operated equipment such as mobile phones, pagers, and laptops.
Original Press Release:
Allegro Microsystems, Inc. Announces New Micropower Omnipolar Digital Hall-Effect Switches
New Ultra-Slim MLP Package
Worcester, MA - August 25, 2003 - Allegro MicroSystems, Inc. introduces a new family of micropower omnipolar digital switches consisting of ultra-sensitive, pole-independent Hall-effect switches with a latched digital output.
The A3213 and the A3214 have nominal current consumption of only 300 µA and 5 µA respectively, and the devices are available for operation from battery voltages of 2.4-5.5 V which is ideally suited to use in almost all handheld portable electronic equipment. Other features include chopper-stabilized, high-sensitivity thresholds, superior temperature stability, low switch-point drift, and insensitivity to physical stresses.
In addition, Allegro's popular A3212 (designed for 2.5-3.5 V operation) is now available in a new ultra-slim micro lead-frame MLP package (suffix EH). The height of this package is only 0.75 mm, with a length of 2mm and width of 3mm.
These new low-power omnipolar parts incorporate a unique clocking scheme designed to reduce the average operating power requirements, making them ideally suited to the detection of open/closed positions in battery-operated equipment such as mobile telephones, pagers and laptop computers. The patented omnipolar feature simplifies application assembly by allowing the device to detect the presence or absence of a magnetic field irrespective of the magnet's polarity.
All three devices are offered in a single-inline (suffix UA) package, and the SOT23W surface-mount package (suffix LH). The A3212 is also offered in a micro lead-frame package (suffix EH). The A3212, A3213 and A3214 are priced at $0.50 in quantities of 10,000.
Allegro MicroSystems, Inc. is a supplier of advanced mixed-signal power semiconductors and Hall-effect sensors targeted toward the automotive, communications, computer/office automation, consumer and industrial markets. It maintains a leadership position in the integrated magnetic sensor and integrated motor driver product segments. With over 2,000 employees, Allegro is headquartered in Worcester, MA. Further information about Allegro, as well as free samples on our products, can be found at www.allegromicro.com.
