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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!torn!news.ccs.queensu.ca!qucdn!leek
- Organization: Queen's University at Kingston
- Date: Monday, 27 Jul 1992 11:06:11 EDT
- From: <LEEK@QUCDN.QueensU.CA>
- Message-ID: <92209.110611LEEK@QUCDN.QueensU.CA>
- Newsgroups: sci.electronics
- Subject: Re: Any LOW power PAL/GALs?
- References: <1992Jul27.025931.6415@ee.ubc.ca>
- Lines: 26
-
- In article <1992Jul27.025931.6415@ee.ubc.ca>, jmorriso@ee.ubc.ca (John Paul
- Morrison) says:
- >
- >I want to use a PAL or equivalent in a low power application.
- >So far, the best I've done is a NS GAL20V8, quarter power.
- >
- >Allegedly this part is CMOS (EEPROM), but I measured about 30 mA
- >sucked in, when nothing was clocking it. Doesn't sound like
- >CMOS to me (ie uA standby current).
-
- There are alternatives if you can program other PLD's. Some of the
- supersets of GAL's have a turbo bit. When this bit is disabled, the
- PLD powers up only when the inputs changes states. At low clock
- speeds, this approach save power at the expense of a slower speed.
-
- One of such chips is Intel's 85C224. (7.5ns doesn't have a turbo bit for
- some obvious reasons... ;) By using crossing programming or conversion
- utilities, you can create the JEDEC file for it.
-
- >jpm
-
- K. C. Lee
- Elec. Eng. Grad. Student
-
- P.S. I have no connection with Intel except for being a happy user of
- their most excellent PLD Shell+ software and hated 80x86 in general.
-