Product category:
Frequency Control Components
News Release from: Intersil | Subject: SL12030 and ISL12032
Edited by the Electronicstalk Editorial
Team on 25 February 2008
Real-time clocks provide long-term
accuracy
By using the AC power line for timekeeping, designers can build devices that perform more accurately and reliably and better withstand extreme temperature changes.
Intersil has introduced the world's first full-featured, AC-driven real-time clock (RTC) devices The new ICs will be designed into a wide range of industrial and consumer products, from power meters and security devices to white goods and other appliances that require precise measurement of time
This article was originally published on Electronicstalk on 8 Jan 2001 at 8.00am (UK)
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The SL12030 and ISL12032 offer dual alarms, event detection and a "brownout" alert.
Traditionally, RTCs have used an external crystal for timekeeping and over long periods of time, some crystal-based solutions can accumulate significant errors.
The 50/60Hz AC power ubiquitous to the USA and Europe is a new and even more efficient method of providing RTCs with a clock source.
By using the AC power line for timekeeping, designers can build devices that perform more accurately and reliably and better withstand extreme temperature changes.
Other features of Intersil's AC-driven RTCs include an automatic crystal oscillator backup in case the AC line frequency is lost (ISL12032); an integrated trickle charger that allows a rechargeable energy source such as a super capacitor or rechargeable battery to be used as a backup supply; dual alarms for reporting problems with system performance; a power status "brownout" alarm that allows the system to save vital information to memory before a complete power loss occurs; time stamp, which records the time and date of events including power loss, recovery and tampering; and a battery status monitor that provides warning if battery voltage drops below a certain threshold.
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