TI to discontinue many ICs!

Status
Not open for further replies.
Jump to Latest
#22
Well, let's be specific. I happen to have a number of spreadsheets I use for quick reference due to the high degree of overlap in National's audio portfolio. Just finished updating them for the PCN and there's actually still a fair amount of duplication in the line up. TI is consolidating from

  • 10 op amps to 5, 2 of which still very much duplicate functionality of 2 others
  • 3 buffers to 1, which were all likely just about the same die anyway
  • 11 chipamps to 5, 4 of which are still all basically the same part
And, for those wanting a through hole op amp option, the LME49720 remains available in TO-99. This doesn't count devices sold under multiple part numbers as those aren't being consolidated---the LM4562 and LME49720 both remain, as do the LM1875 and LM675.

IMO the real loss here is the LME49811 and 49830 as those were actually unique. (The 49810 largely overlaps with the 49811 and hasn't seen much adoption, so I'd consider it pretty much duplicate.)
 
#23
Just checking Farnell stock of the LM4780 as although I don't need them NOW, I might. They still have a stash of evil leaded units that are substantially cheaper than the NOPBs (which are dwindling). Tempting to put a few by for personal use.
 
#26
jackinnj said:
Anyone need an 8080?
Click to expand...

Nope, I'm very happy with $10 LGA771 dual-core Xeons from EBay vendors, with sticker mods for use on LGA775 mobos.

However, I did notice that EBay prices for side-brazed white/gold ceramic-package 8080s have been climbing for some time now, and are now several 100 USD each. Perhaps there are some serious collectors who want to keep spares for their Altair 8800 and IMSAI boxes. Also noted that NOS Intel 2104 4k DRAMs with 1975 and 1976 date codes are still available.

I do have a full set of 1982-dated OKI 64k DRAMs in purple/gold side-brazed ceramic packages lying around, just in case I get the overwhelming urge to build a Circuit Cellar MPX-16 with date-accurate period parts, but it seems very unlikely that it will ever happen.

I've also read about an Altair 8800 clone implemented in a single FPGA. The box is mostly empty, except for a single front-panel planar for the LEDs and toggle switches.
 
#27
twest820 said:
Well, let's be specific. I happen to have a number of spreadsheets I use for quick reference due to the high degree of overlap in National's audio portfolio. Just finished updating them for the PCN and there's actually still a fair amount of duplication in the line up. TI is consolidating from

  • 10 op amps to 5, 2 of which still very much duplicate functionality of 2 others
  • 3 buffers to 1, which were all likely just about the same die anyway
  • 11 chipamps to 5, 4 of which are still all basically the same part
And, for those wanting a through hole op amp option, the LME49720 remains available in TO-99. This doesn't count devices sold under multiple part numbers as those aren't being consolidated---the LM4562 and LME49720 both remain, as do the LM1875 and LM675.

IMO the real loss here is the LME49811 and 49830 as those were actually unique. (The 49810 largely overlaps with the 49811 and hasn't seen much adoption, so I'd consider it pretty much duplicate.)
Click to expand...

The remaining buffer lacks the wide bandwidth mode though so it will be harder to stabilize in a composite amplifier depending on the input op-amp.
 
#28
Thanks again to the OP for the original post/heads-up! I discovered that Arrow had emailed a notice about this on the 1st but I hadn't checked that account in a month. I just ordered a pile of my favorites from Arrow & Mouser.

It probably goes without saying, but be wary of the "replacements" TI has on the list. They have the bipolar-input LME49860 listed as a replacement for the JFET-input LME49880.

Well maybe this is an opportunity for some other manufacturer that cares a bit about audio (I'm looking at you NJR - AD - LT) to jump in and make some equivalent-or-better chips to replace the handful of still-useful parts. Another company might even be able to buy the existing intellectual property from TI for cheap since TI appears to be abandoning these (National) parts entirely.
 
Last edited:
#29
twest820 said:
Last time buys are in September 2016 for all parts I've checked. The parts remain in production until those orders are filled. So there's probably not, you know, exactly a rush.
Click to expand...

I rather doubt DK and mouser will keep their stocks replenished and will let them go into minimum order status for most of the 'end of life' parts , not exactly DIY friendly either
 
#32
from TIe2e:
TI's OpAmp business has a huge portfolio of newer parts that you can select from. Please refer to below table to find an alternative part for the LM part.

Our apologizes for any inconvenience this causes.
EOL Part Alternative Part # Comment
LM4562MA/NOPB OPA1602AID
LM4562NA/NOPB OPA2227P PDIP
LM833M/NOPB OPA1652AID
LM833MMX/NOPB OPA1652AID
LM833MX OPA1652AID
LM833N/NOPB LM833P PDIP
LME49600TS/NOPB BUF634F
LME49610TS/NOPB BUF634F
LME49710MA/NOPB OPA1611AID
LME49710MAX/NOPB OPA1611AID
LME49710NA/NOPB OPA227P PDIP
LME49720MA/NOPB OPA1602AID
LME49720NA/NOPB OPA2227P PDIP
LME49722MA/NOPB OPA1612AID
LME49722MAX/NOPB OPA1612AID
LME49723MA/NOPB OPA1652AID/OPA1662
LME49724MAX/NOPB OPA1632D
LME49724MR/NOPB OPA1632D
LME49725MA/NOPB OPA1662AID
LME49725MAX/NOPB OPA1662AID
LME49740MA/NOPB OPA1604AID
LME49740MAX/NOPB OPA1604AID
LME49740NA/NOPB OPA4227P PDIP
LME49743MT/NOPB OPA1664/OPA1654AID
LME49860MA/NOPB OPA1612AID
LME49860NA/NOPB OPA2227P PDIP
LME49870MA/NOPB OPA1611AID
LME49880MR/NOPB OPA1642AID
LME49880MRX/NOPB OPA1642AID
LME49990MA/NOPB OPA1611AID
LME49990MAX/NOPB OPA1611AID
 
#33
A tip for anyone else looking to buy a quantity of LME49600 for cheaper than Mouser. Arrow is sold out but it appears that Avnet not only has stock, they show stock on order to arrive 12/1/15 and 1/25/16. They often have big minimum quantities, but it looks like they are showing "special quantity" - meaning 1x (!) - for some of the discontinued TI parts.

lms said:
TI's OpAmp business has a huge portfolio of newer parts

LME49600TS/NOPB BUF634F
LME49610TS/NOPB BUF634F
Click to expand...

This is interesting. They are saying the BUF634 is "newer" than the LME49600 :Pinoc: and the +/-18Vdc BUF634 is a replacement for the +/-22V LME49610 :headbash: . Nice try, TI.
 

Attachments

  • avnet1.jpg
    avnet1.jpg
    61.7 KB · Views: 1,025
Last edited:
#34
agdr said:
Thanks again to the OP for the original post/heads-up! I discovered that Arrow had emailed a notice about this on the 1st but I hadn't checked that account in a month. I just ordered a pile of my favorites from Arrow & Mouser.

It probably goes without saying, but be wary of the "replacements" TI has on the list. They have the bipolar-input LME49860 listed as a replacement for the JFET-input LME49880.

Well maybe this is an opportunity for some other manufacturer that cares a bit about audio (I'm looking at you NJR - AD - LT) to jump in and make some equivalent-or-better chips to replace the handful of still-useful parts. Another company might even be able to buy the existing intellectual property from TI for cheap since TI appears to be abandoning these (National) parts entirely.
Click to expand...

No problem, I've gotten so much help on my projects here I want to find ways I can give back.

As far as AD, LT, & NJR- I agree, I've already been experimenting with AD8620 & LT1028 quite a bit. I respect NJR after building my O2, using 2068, 4556, and 2903(?).

I ordered about $200 of spares from Mouser last night, also not expecting them to replenish stock.
 
#37
Derfnofred said:
I realize that the OPA16XX series is SOIC-8, but there are a LOT of good opamps in there. Pity this is happening, but understandable.
Click to expand...

I appreciate you pointing this out. Our team here in Tucson did the best they could to offer replacement suggestions on very short notice. Although I'm not sure why a marketer stuck the word "newer" in there, that made me cringe...

Obviously we can't just conjure identical op amps out of thin air to replace the EOL National parts, so not all the parameters on the OPAxxxx parts line up perfectly with the National parts. The BJT replacement for a JFET is another story, but we were only asked to offer OPAxxxx suggestions, so I'm not sure who made that suggestion. If you need a good JFET op amp: OPA1642, if you needs a REALLY good JFET op amp: OPA827 (only available in single).

I can tell you unequivocally that the TI op amp team in Tucson does care about audio (because it's my job personally to make them care) and will continue to develop new OPA16xx op amps for the audio market.
 
Status
Not open for further replies.
Top Bottom