>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>Sent: 08 March 2006 19:05
>To: Microcontroller discussion list - Public.
>Subject: Re: [EE] LVTTL Schmitt trigger non-inverting buffer - 
>do theyexist in tiny packages?
>
>
>At 05:32 PM 3/8/2006 +0000, you wrote:
>>Help!
>>
>>Requirements:
>>
>>Supply voltage 3.3v
>>Input thresholds LVTTL (0.8v/2.0v)
>>Output thresholds CMOS (driving an AVR)
>>Schmitt Trigger
>>Smallest package possible e.g. Philips Pico-logic or TI's
>>NanoStar/NanoFree die-with-solder-bumps style would be perfect.
>>
>>I've been scouring various manufacturers web sites and nothing I can 
>>see
>>comes close, in particular I can't find a Schmitt trigger 
>device with true 
>>LVTTL compliant inputs.  Do they exist?
>>
>>Thanks
>>
>>Mike
>
>You could always series two inverting ST in one tiny package 
>such as the SC70-6 NL27WZ14.


I would be happy to do that, but as with some Philips products I have found, they appear to have a VERY loose idea of what LVTTL is.  That part says LVTTL compliant at 3volts (which would be awkward anyway) but the min/max thresholds at that voltage are 2.2v and 0.6 rather than 2.0v and 0.8v.  Probably close enough from my point of view, but customer is insistant on meeting the actual LVTTL levels after problems with another vendors part.

Regards

Mike

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