Re: k7elp60 and ICL7660 Specs
Here are the Specs:
ICL7660CPA is rated at 10.5 volts, ICL7660ACPA is rated at 13 volts, ICL7662CPA is rated at 22 volts And the LT1054-CN8 is rated at 15 Volts.
However, In tests I did with Various Batches of the ICL7660CPA, (with it claimed rating of 10.5 volts) It Works Perfectly OK with voltages up to "AT LEAST 16 Volts".
In Addition, I have a Metal Detector Project on my website that runs on a 12 Volt Sealed Lead Acid Battery, However, it Typically delivers 14.5 volts at a full charge. I have used this ICL7660CPA on well over 100 of these units, WITHOUT ANY FAILURES in over a year.
I believe all these chips are close to being identical, if not identical. Its more how they want to spec them for a particular price and application.
Reminds me of FLEA Powder for Cats and Dogs. They sell Both, But Both are Identical except for the label. However most persons have both will buy both. A Cheap way to increase Sales.
Try it Yourself, It is Much Cheaper to buy.
Take care.........Gary