Quad 2-input NOR-gate with schmitt trigger inputs... - Electronic Circuits Projects Diagrams Free

Exo · 18th July 2004, 02:30 PM

Does such a part exist?
If anyone happens to know a part number please tell me :wink:

laroche73 · 18th July 2004, 06:48 PM

Nope. Parts like the 74HC14 inverter and 74HC132 quad NAND are about the only options (Phillips made some oddball 9-wide buffers/inverters, they're hard to find). A 74HC14 combined with a 74HC08 would give you three schmitt-trigger NOR gates.

Sebi · 19th July 2004, 07:07 AM

CD4093

Exo · 19th July 2004, 11:41 AM

Quote:

Originally Posted by Sebi

CD4093

Isn't that a NAND gate?

laroche73 · 19th July 2004, 02:20 PM

Yep. The CD4093B (NAND) and CD40106B (hex) are CD4000 substitutes for the 74HC132 and 74HC14, if you need the wider supply voltage range of the CD4000 family. To my knowledge, there is no quad NOR gate package w/schmitt trigger inputs available in any family.

niq_ro · 20th July 2004, 08:04 AM

a list with datasheets are at http://www.megatronics.lk/products/ics/4000/

CD4001 or CD4002 but is not trigger schmitt

Exo · 21st July 2004, 10:25 PM

Found what i was looking for
SN74HC7002 8)

laroche73 · 22nd July 2004, 04:29 PM

Nice, I saw those once in a DigiKey catalog but didn't notice the schmitt-trigger inputs. Quad 2-input AND and OR versions are also available. The parts are a little pricey, but fill a gap that's been missing for a long time.

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18th July 2004, 02:30 PM	(permalink)
Exo	Quad 2-input NOR-gate with schmitt trigger inputs... Does such a part exist? If anyone happens to know a part number please tell me :wink:

18th July 2004, 06:48 PM	(permalink)
laroche73	Nope. Parts like the 74HC14 inverter and 74HC132 quad NAND are about the only options (Phillips made some oddball 9-wide buffers/inverters, they're hard to find). A 74HC14 combined with a 74HC08 would give you three schmitt-trigger NOR gates.

19th July 2004, 02:20 PM	(permalink)
laroche73	schmitt trigger inputs Yep. The CD4093B (NAND) and CD40106B (hex) are CD4000 substitutes for the 74HC132 and 74HC14, if you need the wider supply voltage range of the CD4000 family. To my knowledge, there is no quad NOR gate package w/schmitt trigger inputs available in any family.

21st July 2004, 10:25 PM	(permalink)
Exo	Found what i was looking for SN74HC7002 8)

22nd July 2004, 04:29 PM	(permalink)
laroche73	Nice, I saw those once in a DigiKey catalog but didn't notice the schmitt-trigger inputs. Quad 2-input AND and OR versions are also available. The parts are a little pricey, but fill a gap that's been missing for a long time.