Datasheet for Signetic NE553?

Anyone have anything on this old IC - from 1976? I can't find it in my
regular Data books, IC Masters (oldest one I have is 1978), etc.

It appears to be an up/down counter of some sort, splitting the input clock
generated by a 555 into two pulses - one slightly delayed relative to the
other - used on a programming card for a test fixture (Kursh-Kasch video test
fixture) for an early video game - Demolition Derby by Chicago Coin.

It is most definite that the part number is NE553 BA, I am not missing a
digit. It is a 16pin DIP device. Power/gnd pins are 5 & 12...

There's no NE553 in the 1974 Signetics databook. I don't have a later

Markings are:

S7604
NE553
BA


Thanks!

John :-#)#
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On Sat, 26 Sep 2009, John Robertson wrote:

It appears to be an up/down counter of some sort, splitting the input clock
generated by a 555 into two pulses - one slightly delayed relative to the
other

There's no NE553 in the 1974 Signetics databook. I don't have a later
one.

Signetics did come out with the NE558, which was a quad timer, sort of
like 4 555's in a package (but since there weren't enough pins, it
couldn't do all that the 555 did).

On Sat, 26 Sep 2009, John Robertson wrote:

Anyone have anything on this old IC - from 1976? I can't find it in my
regular Data books, IC Masters (oldest one I have is 1978), etc.

It appears to be an up/down counter of some sort, splitting the input
clock generated by a 555 into two pulses - one slightly delayed
relative to the other - used on a programming card for a test fixture
(Kursh-Kasch video test fixture) for an early video game - Demolition
Derby by Chicago Coin.

It is most definite that the part number is NE553 BA, I am not missing
a digit. It is a 16pin DIP device. Power/gnd pins are 5 & 12...

There's no NE553 in the 1974 Signetics databook. I don't have a later
one.

I almost want to say it has something to do with servo motor control,
but I don't know why that comes to mind, and certainly don't know that it
applies to the 553.

Signetics did come out with the NE558, which was a quad timer, sort of
like 4 555's in a package (but since there weren't enough pins, it
couldn't do all that the 555 did). Make sure you aren't reading the
"8" for a "3". You should be able to find the pinouts for the 558, and
comparing it to the circuit might show a match.

Michael

Markings are:

S7604
NE553
BA


Thanks!

John :-#)#
--
(Please post followups or tech inquiries to the newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."