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I am migrating from the MC68HC811E2 to MC68HC711E9. I am looking for the maximum voltage the the MC68HC811E2 can handle. Can I apply 12v to the XIRQ of the MC68HC811E2 safely? Thanks Everyone John

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At 11:39 AM 23/12/02 -0800, you wrote: >I am migrating from the MC68HC811E2 to MC68HC711E9. I am looking for the >maximum voltage the the MC68HC811E2 can handle. Can I apply 12v to the XIRQ >of the MC68HC811E2 safely? Hi John Do you mean the XIRQ of the HC711 above? The XIRQ doubles up as the Vpp input pin in the HC711 to which you need to apply the 12V (12.25V nominal) to program the EPROM. I don't think it is safe to apply the 12V to the HC811 as there is no EPROM to program and the pin may not sustain the higher voltage. I had a look at the HC811 technical summary but it doesn't show anything on the above. Remember that you need at least 100R (up to 1K) in series with the 12V to the pin and also a 100nF cap to ground to program the chip. Regards John Samperi ****************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA Tel. (02) 9674-6495 Fax (02) 9674-8745 Email: Website http://ampertronics.com.au * Electronic Design * Technical Services * Contract Assembly ******************************************************

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