Which chip is this? 274 E16 L309

[Engineer]

Hi, all.
In a recently acquired pile of vintage junk (well not all junk, some
good pieces!) I found a stick of 12 vintage IC's. They are all 14 pin
DIP's marked "274 E16 L309". Does anyone know what these are? A
google search came up with nothing relevant.
Thanks for all replies,
Cheers,
Roger
PS. address shown is fake for anti-spam, please use analogdino at(ta-
boy) rogers dot(ty-as-they) com(e), suitably decoded.
PPS. I hope this is not a double post - tried yesterday but found no
sign of it on the NG.

 

[N_Cook]

Engineer <junk2007@rogers.com> wrote in message
news:7aa755ca-ff8b-4a6a-bd84-7b52387dac33@t41g2000yqt.googlegroups.com...

Hi, all.
In a recently acquired pile of vintage junk (well not all junk, some
good pieces!) I found a stick of 12 vintage IC's. They are all 14 pin
DIP's marked "274 E16 L309". Does anyone know what these are? A
google search came up with nothing relevant.
Thanks for all replies,
Cheers,
Roger
PS. address shown is fake for anti-spam, please use analogdino at(ta-
boy) rogers dot(ty-as-they) com(e), suitably decoded.
PPS. I hope this is not a double post - tried yesterday but found no
sign of it on the NG.

What is the likely date ?
Early plotter type angular chalky print or later
printed in one line or transverse down the length


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm

 

[Engineer]

On Mar 9, 7:44 am, "N_Cook" <dive...@tcp.co.uk> wrote:

Engineer <junk2...@rogers.com> wrote in message

news:7aa755ca-ff8b-4a6a-bd84-7b52387dac33@t41g2000yqt.googlegroups.com...

Hi, all.
In a recently acquired pile of vintage junk (well not all junk, some
good pieces!) I found a stick of 12 vintage IC's.  They are all 14 pin
DIP's marked "274   E16   L309".  Does anyone know what these are?  A
google search came up with nothing relevant.
Thanks for all replies,
Cheers,
Roger
PS. address shown is fake for anti-spam, please use analogdino at(ta-
boy) rogers dot(ty-as-they) com(e), suitably decoded.
PPS.  I hope this is not a double post - tried yesterday but found no
sign of it on the NG.

What is the likely date ?

No idea, when did DIP's get replaced by surface mount?

Early plotter type angular chalky print or later

No, clear white letters on the black plastic, sort-of ariel fort

printed in one line or transverse down the length

printed one above other across the IC width, viz:
274
E16
L309

Cheers,
Roger