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I found this chip whilst looking through some old electronics parts I've been left, does anyone know what it is? I am very new to electronics and a cursory Google gives only opertunities to buy more, no data sheets.

The writing on the top says:
F P9842AB
CD4528BCN

With the first "f" being stylised as if it's a brand.

Here is a picture:

Photo of unidentified IC

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  • 2
    \$\begingroup\$ CD4528 is the important substring. \$\endgroup\$ – user2943160 Aug 27 '16 at 16:32
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As noted, this is a

CD4528BCN Dual Monostable Multivibrator

If you cannot find this (originally by RCA labs), then to convert to the On Semi equivalent number, do this:

New number = MC1 + numeric value (in this case 4528). There may or may not have been a part made, but in most cases On Semi (as Motorola semiconductor products sector) would have done so at some point.

For MC14528 we can actually find a datasheet.

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P9842AB chip data sheet or identification
[...]
The writing on the top says:
F P9842AB
CD4528BCN

As user2943160 has already kindly mentioned in the comments, you were focussing on the wrong part of the numbers on the top. :-)

This is a CD4528BC Dual Monostable Multivibrator, made by Fairchild Semiconductor (that's the " f " symbol), probably in week 42 of 1998 (hence 9842).

The suffix N identifies the package type - in this case, standard plastic dual-in-line (PDIP):

Extract from Fairchild CD4528BC datasheet Source - Fairchild datasheet

I can't find the Fairchild datasheet on their website, but the Fairchild datasheet is (currently) available on the Digikey website (link). Other CD4528 manufacturer's datasheets would also likely apply (more or less).

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