Microprocessor Supervisory IC monitors 4 voltage inputs.
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Press Release Summary:
Able to monitor up to 4 system supply voltages without requiring external components, AS1923 asserts single reset if any monitored supply voltage drops below threshold. Factory-trimmed voltage threshold options are available for monitoring +5.0, +3.3, +3.0, +2.5, +1.8, and -5.0 V supplies with -5% and/or -10% tolerances. Solution is also available with 1 or 2 user-adjustable threshold options, via external resistor-divider network, if non-standard voltage thresholds are required.
Original Press Release:
Austriamicrosystems Launches Quad-Voltage Microprocessor Supervisory Circuit
AS1923 offers precise monitoring of multi supply systems without the need for external components
Unterpremstaetten, Austria (July 27, 2007) - austriamicrosystems (SWX: AMS), a leading global designer and manufacturer of analog integrated circuits (ICs) for communications, industrial, medical and automotive applications, has expanded its supervisory portfolio with the AS1923, a quad voltage microprocessor supervisory IC. The AS1923 was designed to monitor up to four system supply voltages without the need for external components, and asserts a single reset if any of the monitored supply voltages drops below its reset threshold.
A variety of different factory-trimmed voltage threshold options are available for monitoring +5.0, +3.3, +3.0, +2.5, +1.8, and -5.0V supplies with -5% and/or -10% tolerances. The AS1923 is also available with one or two user adjustable threshold options (via external resistor-divider network) if non-standard voltage thresholds are required. The internally trimmed thresholds and the two reset output options minimise the need for external components. The open-drain output can be overdriven by external voltages ranging from 0V to +5.5V to provide easy interfacing to other devices.
The AS1923 features an active-low reset output that is asserted when any of the 4 monitored voltages are below their respective reset threshold. The reset output is available as open-drain (AS1923A) or 10µA Current Source Pullup (AS1923B). Reset remains low for a specified reset timeout period (120ms min) after all voltages have stabilized. The output is valid as long as the IN1 or IN2 input voltage remains above 1V.
The AS1923 operates from +1.0V to +5.5V, while consuming only 55µA of supply current. Minimal external component requirements and small size greatly improves reliability compared to individual supervisory circuits or discrete components.
The devices are available in a small 6-pin SOT23 package, suitable for operating environments ranging from -40°C to +85°C. For product-specific information, to download datasheets or to request free samples from austriamicrosystems' online shop ICdirect, please visit http://austriamicrosystems.com/03products/15_microprocessor_supervisors.htm
About austriamicrosystems
austriamicrosystems is a leading designer and manufacturer of high performance analog ICs, combining more than 25 years of analog design capabilities and system know-how with its own state-of-the-art manufacturing and test facilities. austriamicrosystems leverages its expertise in low power and high accuracy to provide industry-leading customized and standard analog products. Operating worldwide with more than 1,000 employees, austriamicrosystems focuses on the areas of power management, sensors & sensor interfaces, portable audio and car access in its markets Communications, Industry & Medical and Automotive, complemented by its Full Service Foundry activities. austriamicrosystems is listed on the SWX Swiss Exchange in Zurich (ticker symbol: AMS).
For more information, please visit the web site at www.austriamicrosystems.com.
Electronic picture and block diagram are available on request or at http://austriamicrosystems.com/07presscenter/presscenter_start.htm
For further information:
Technical Contact
austriamicrosystems AG
Manfred Kogler
Marketing Manager Standard Linear
Tel: +43 (0) 3136 500 5274
Fax: +43 (0) 3136 500 5420
manfred.kogler@austriamicrosystems.com
www.austriamicrosystems.com
