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- Newsgroups: sci.electronics
- From: tchannon@black.demon.co.uk (Tim Channon)
- Path: sparky!uunet!gatech!destroyer!sol.ctr.columbia.edu!eff!ibmpcug!pipex!demon!black!tchannon
- Subject: Dallas Semiconductor Clock Chip
- Distribution: world
- References: <1992Jul22.200259.22871@athena.mit.edu>
- Organization: null
- Lines: 22
- Date: Fri, 24 Jul 1992 20:33:25 +0000
- Message-ID: <712010005snx@black.demon.co.uk>
- Sender: usenet@gate.demon.co.uk
-
- > I am presently working on a project which uses a 6811 and
- > a clock chip as part of a timer which will be deployed
- > in the ocean for up to a year at a time. The timer controls
- > and instrument which takes water samples for climate
- > change research...
- >
- A good chip for many application is the ICM7170 (or similar number from other
- source(s)).
-
- This is a nice chip to use. Unusually (for clock chips) it is fast enough to
- hang directly on the bus (300ns), has the alarm you want during powerdown,
- time from 1/100s to years inc. leap years, has a latch instruction for easy
- reading, on board power switchover. It is intended for single lithium cell
- backup and screened parts to 2ua on 32k xtal are available.
-
- I've used it for critical applications without problems in commercial
- systems. Critical means one failure costs as much as I'm paid in three
- months. I hate leap years, and will not be available starting 1999!
-
- TC.
- E-mail: tchannon@black.demon.co.uk or tchannon@cix.compulink.co.uk
-
-