![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1555318;image)
I can resume sorting the few remaining IC's I had dug out the other day.
DS1489 DIP14
75452 DIP 8
TS4116-20NL DIP16.... looks like a memory / PAL / GAL kind of part number...
All from memory...
TS4116 = 16k x 1 bit SRAM
OK I am done Googling... here is the result !
Almost correct on this memory ! 16x 1bit indeed, but DRAM not SRAM. 20ns access time.
I have 8 of them so I could make a more useful byte wide memory out of them. However DRAM is a pain, so why would I inflict such a pain to myself instead of just using an SRAM...
However they don't take much space so might keep them anyway in case I encounter some old Gizmo one day that needs these...
I can always throw them away if I need the space and / or want to clean up my inventory.
D765 = not an FDC controller. It's an OTP microcontroller. Think it had something like 1K of OTPROM and a few bytes of RAM. It probably ended up as an FDC.
Wow I can't believe you know this chip ?!
![WTF? :wtf:](https://www.eevblog.com/forum/Smileys/default/wtf2.gif.pagespeed.ce.pxLiY5pjs4.gif)
I thought it was exotic...
What I don't understand is that other than you and a couple Ebay sellers :
https://www.ebay.com/itm/173966485163https://www.ebay.com/itm/363746983177...that have one for sale and advertise it as an MCU with as you said 1KB of PROM and 64 bytes for RAM.... other than that then, the entire internet says it's a floppy disk controller ! The datasheet says so, and I found a NEC product catalogue from 1990 that lists all their MCU and CPU peripherals and... the (µP)D765 is in there.... as a disk controller not an MCU.
![Confused :-//](https://www.eevblog.com/forum/Smileys/default/confused0024.gif.pagespeed.ce.5xOqKkq0Co.gif)
So I am flabbergasted (first time I use that weird word, hope I got it right !
![Grin ;D](https://www.eevblog.com/forum/Smileys/default/xgrin.gif.pagespeed.ic.QVVz6XIT20.png)
), as to how you and these 2 Ebay sellers think it's an MCU ?!
How did you come to think it's one ? Even know its specs... I am stunned. As you said maybe it's an MCU that NEC pre-programmed to serve as a disk controller.... but still how would you know it's an MCU inside ?!
![Confused :-//](https://www.eevblog.com/forum/Smileys/default/confused0024.gif.pagespeed.ce.5xOqKkq0Co.gif)
Maybe if you were a company big enough (that you may have worked for in the past) NEC would sell you this micro, and give you its datasheet so you can use it but.... they did not advertise it in their own products catalog, somehow. Also why would they use the same part number for the MCU and the pre-programmed disk controller... confusing at the least...
I am .... very confused and.... very curious to know what's what.
However at the end of the day, I guess it's not a big problem because in either case, since it's OTP, I can't make use of this chip so I don't really NEED to know what it is nor have a datasheet for it. So I will just keep it for the sheer beauty of its package and that's all...
DS1489 = RX end RS232 driver. Or TX end. Can't remember. Usually paired with 1488 at the other end.
Wow impressed again... It's a QUAD RS-232 receiver.
MMI = probably custom PROMs looking at the manufacturer and package. Same as the bugger that blew up in my 465B. Based on what looks like an NSN number on them they are probably programmed with some random shit already.
Yes again !
They are MMI 6301-1J, TTL PROM 256x4 bits.
I also have another one, same specs, made by HARRIS : a M3-7611A
Both have the same pinout according to their datasheet.
Found also a data sheet from Signetics for their own version of the same chip. At the end of their datasheet is a full page of cross references.
Looks like these DIP 16 TTL PROM were trendy baxck in the day, they were made by numerous manufacturers under various part number styles.
Hell, maybe the ones at ch_scr TEA Auction the other day will be the same as well ?!
![Evil >:D](https://www.eevblog.com/forum/Smileys/default/xevil.gif.pagespeed.ic.tdrs7Uj5gu.png)
Hmmm... so the programmer I will make for his PROMs might work to read these other PROMs as well
![Cool 8)](https://www.eevblog.com/forum/Smileys/default/xcool.gif.pagespeed.ic.cOxV6sPNRd.png)
Rest no idea ![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif.pagespeed.ce._hfWAz_QHO.gif)
Well here it is then :
- Blue coloured plastic DIP16, marked 16-1-151. No info, so in the trash it goes. At some point Google fooled me into thinking it could be a resistor array, but I buzzed it and no way.
- FDC 9216 DIP 8 = floppy disk "data separator"... guess it's consistent with the NEC chip discussed above... not much use for that. Dismissed.
- µA747 = it's a dual 741 ... and I have 18 of them. Add x18 "standalone" 741 (including 3 in a cool metal can), that means I have x54 741 op-amps !
![Shocked :o](https://www.eevblog.com/forum/Smileys/default/xshocked.gif.pagespeed.ic.CrwtrNUjLO.png)
That's my #1 in my inventory then.... I hope it's good enough for general purpose.
Next most popular in my inventory is the LM324. Have x11 of them... times 4, 44 op-amps.
Next is the 358. 8 chips, 2 per packages, so 16 of them.
So I guess these will be my 3 most used op-amps when fucking around on a breadboard...
- 75452 = well turns out I already have 3 of them. DIP8, contains a single TTL logic gate with an open-collector output.
- D3-6402-9 , DIP40, x7 of them. No info other than 3 sellers Google found me, 15 Euros a piece (I am rich now), but none of them actually tell you what this chip is. They sell it, that's all. So since I can't know what they are at all.... dismissed.
https://www.ebay.com/itm/194905372556https://www.radio741.com/62713-d3-6402c-9-harris-integrated-circuit.html- TDA1085C, DIP 16, x12 of them. Not an audio amp for a change. No, this thing is apparently very specialized says its datasheet. It's phase angle TRIAC controller, meant to provide speed control for "universal" type motors,, in washing machines. There you go ! I guess it makes sense that my dad stocked on these, since he was teaching white good servicing/repair, back then, and washing machines obviously amounted to a good chunk of the curriculum. I guess this chip was common place in washing machines at the time.
OH !!! Just had an idea !!!
![Shocked :o](https://www.eevblog.com/forum/Smileys/default/xshocked.gif.pagespeed.ic.CrwtrNUjLO.png)
Let's see...