CMOS ICs, op-amps and other chippery ...

I have, it seems, accumulated quite a number of ICs over the years - enough that it took me two whole evenings to sort them all out. As I use surface-mount devices almost exclusively nowadays, the through-hole chips are pretty much surplus to requirements so I'm having a clearout. 

THESE ARE ALL THROUGH-HOLE DEVICES SO ARE BREADBOARD AND DIY-FRIENDLY

This is an incomplete list, and may be added to in future - stock levels will vary wildly. Take your pick from:

• TL072/TL082 (DIP-8) - dual op-amp. Myriad different uses (buffers, comparators, oscillators etc.)
• TL074/TL084 (DIP-14) - quad op-amp. As above, but twice as many.
• LM13700 (DIP-16) - dual operational transconductance amplifier (OTA). A very versatile piece of kit - can be use to make filters, VCOs and VCOs. The datasheet has a load of useful example circuits.
• NE555/SA555 (DIP-8) - the classic timer IC. Surprisingly versatile ...
• CD4017 (DIP-16) - 10-stage counter; the ideal chip for building sequencers
• CD40106 (DIP-14) - Hex Schmitt trigger inverter. Another mind-bogglingly useful chip that can be used for oscillators and a whole lot more. People have built entire systems around these ...
• 6N138 (DIP-8) - Darlington optocoupler. Very useful for MIDI-oriented circuits.

All of these ICs were sourced from suppliers in the UK, so they're all legit - most were manufactured by the likes of TI, STMicro and NXP with the occasional outlier (Renesas, Fairchild etc.). You can find datasheets using your favourite search engine or similar.

If you require a large number of any particular IC, let me know and I might be able to accomodate you (I have a lot of TL074/084s, for example ...). I also have a few surface-mount ICs available - mostly op-amps.

NOTE: if a particular IC is shown is out of stock, chances are that I will have it but I haven't got around to counting how many I actually have. Drop me an email letting me know what you're after and I can let you know whether or not there's a genuine lack of stock or it's just me being lazy ....