Path: utzoo!utgpu!watmath!onfcanim!dave
From: dave@onfcanim.UUCP (Dave Martindale)
Newsgroups: sci.electronics
Subject: Re: Resistor Networks
Keywords: sips
Message-ID: <17813@onfcanim.UUCP>
Date: 21 Mar 89 06:13:19 GMT
References: <2308@lll-lcc.UUCP>
Reply-To: dave@onfcanim.UUCP (Dave Martindale)
Organization: National Film Board / Office national du film, Montreal
Lines: 22

In article <2308@lll-lcc.UUCP> rzh@lll-lcc.UUCP (Roger Hanscom) writes:
>We've all seen single
>value devices that have a common pin with resistance between
>that pin and all the others equal to x ohms.  Just recently,
>I've come across some that are identified as 220/330 ohm.  They
>look just like the others, but I can't find any two pins that
>show resistance of 220 or 330.  The 'common' pin and the pin
>at the other end of the package seem different than the others,
>but they are not like regular sips.  How are they configured?

Pin one of an ordinary SIP resistor can be considered a common "bus",
and all other pins have a particular value of resistor between
that pin and the "bus".

The ones you have should use pin 1 and the one at the other end as
two separate busses.  Each of the in-between pins should have 
a 220-ohm resistor between it and one bus, and 330 between it and
the other bus.  These are often used for TTL bus terminators -
the SIP is connected to +5V and GND.

If you can't measure either 220 or 330 between an end pin and
any inner pin, perhaps the SIP is defective or marked wrong.