>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>Sent: 08 March 2006 20:01
>To: Microcontroller discussion list - Public.
>Subject: Re: [EE] LVTTL Schmitt trigger non-inverting buffer - 
>do theyexist in tiny packages?
>
>
>At 10:32 AM 3/8/2006, Michael Rigby-Jones 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?
>
>SN74AUP1T97DBVR
>SN74AUP1T98DBVR

Unfortunately these have LVCMOS thresholds rather than LVTTL.

>
>May not be close enough but SN74AUP1G58DBVR

It would probably work, but the customer is very specific about having LVTTL logic thresholds.  The above part has quite a wide range on the thresholds, which varies proportionaly with supply voltage (typical schmitt trigger behaviour), which is the main stumbling block I am having with any parts I have found.

Thanks for the suggestions though.

Regards

Mike

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