At 06:33 PM 6/30/2004 -0300, you wrote:
>Hello Piclisters,
>       Anyone has a good crystal oscillator circuit with 2 schmidt
>       trigger gates (74HC14) for 4 MHz ?

Schmitt trigger inverters don't make a good xtal oscillator.

One stage of an 74HCU04 makes a good Pierce oscillator. The "U" is
important. They are available in single (and maybe dual) versions if you
want small (eg. the Toshiba TC7SZU04F)

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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