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Which chip is this? 274 E16 L309

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.

Reply to
Engineer
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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

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Reply to
N_Cook

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

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

printed one above other across the IC width, viz:

274 E16 L309

Cheers, Roger

Reply to
Engineer

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