Try Phillips/Signetics HEF4069UB  (hex inverter, U stands for unbufffered
 version)

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From:   John P. Leonard[SMTP:leonard@TARDIS.SVSU.EDU]
Sent:   Sunday, January 25, 1998 10:19 PM
To:     PICLIST@MITVMA.MIT.EDU
Subject:        Name that chip! [adjacent topic]

Hi all,

I need help identifying an IC in a device I'm dissecting.  The device is
a the receiver for an "invisible fence" system for pets:  a buried perimeter
wire emits a signal that is picked up by a small receiver attached to the
pet's collar.  The transmitter and receiver are both PIC-based; the receiver
detects the signal with an IC bearing the following logo and part #:

                  ___________________
                 /                  /
               /      ____________/
             /______/   _________         9  5  3  3  H
                       /       /
                     /       /
                   /       /            4   0  6  9  U  B
                 /_______/



This receiver would work perfectly in a project I'm working on.
Any help on who the manufacturer of the mystery IC would be appreciated.

Thanks,
John Leonard

J-TRON Eng.
Midland, MI