4069UB=CMOS HEX inverter of series 4000, Unbuffered MAnufactured year 95
Week 33
A very lot of manufacturer make it. For data try Mototrola, Harris,
National etc
Pinning as TTL 7404, Voltage 3-15V typical
One of my favourites.
Often used in analog mode as inverting amplifier: Input voltage via
resistor to inverter input, and another between input and output. Cheap,
simple low-end.
In the named cirquit, replacing the one inverter with two serially
connected inverters instead, makes it an scmitt-trigger. Another use is to
build crystal oscillators. Or RC oscillators, or....

Regards
/Morgan


At 16:19 1998-01-25 -0500, you wrote:
>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
>
>

Morgan Olsson, MORGANS REGLERTEKNIK, Sweden, ph: +46 (0)414 70741; fax 70331
============================================================================