Product category:
Analogue and Mixed Signal ICs
News Release from: Catalyst Semiconductor | Subject: CAT1232LP and CAT1832
Edited by the Electronicstalk Editorial
Team on 16 June 2005
Supervisors offer monitoring system on
single chip
Watchdog supervisors perform three vital system functions - power on reset, software watchdog and manual reset.
Catalyst Semiconductor has continued expansion of its supervisory product family of analogue/mixed-signal integrated circuits with the industry standard, low power CAT1232LP and CAT1832 watchdog supervisors The CAT1232LP and CAT1832 are pin compatible and each performs three vital system functions - power on reset, software watchdog and manual reset
This article was originally published on Electronicstalk on 7 Feb 2002 at 8.00am (UK)
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The CAT1232LP performs the reset and monitoring functions for a 5V powered system, whereas the CAT1832 performs the reset and monitoring functions for a 3V powered system.
The devices will hold a microprocessor, microcontroller or system chipset in reset until the supply reaches the specified in-tolerance condition; and then maintains the reset condition for a minimum of 250ms before releasing the reset outputs providing time for the power supply to completely stabilise.
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Once the reset outputs are released, the device immediately starts a watchdog count down clock that is reset each time the watchdog input is strobed.
If the watchdog clock should time out, the device will immediately cycle the reset outputs; restarting the system.
A debounced manual reset input also allows the device to be connected to an external pushbutton, or other signal, for system restart.
These devices are found in virtually all types of applications, but most extensively in industrial/commercial control and monitoring applications, especially those using the 8051 family of processors.
"The CAT1232LP and CAT1832 expand Catalyst Semiconductor's supervisory product breadth with two of the most popular products of this type.
These supervisors provide a complete supervisory monitoring system on a single chip.
They not only monitor the power supply to maintain reliable and consistent operating conditions, but also automatically restart the processor if it hangs for any reason without external intervention", said Jerry Miller, Product Marketing Manager.
"Additionally, the watchdog function provides an exceptional benefit in systems that are remote or not easily accessible, reducing potential maintenance costs by automating the system restart process", he concluded.
The CAT1232LP and CAT1832 are available in 8-lead SOIC, MSOP, DIP packages; the CAT1232LP is also available in a 16-lead SOIC package; price in 1000 piece quantities for the CAT1232LP and the CAT1832 is $0.54.
Both devices are available in environment friendly "green" packages that are halogen and lead free with full RoHS compliance.
Samples and production quantities are available now.
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