TI degrading specs of existing parts without changing part numbers

This looks horrendous. How to destroy your reputation in one easy lesson. John

Supposedly they enshittified the TL072 as well.

They changed the process on a part that's 47 years old.

Scandalous.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

When you significantly degrade a couple of parameters that are important for many users of that part and don't provide a means of knowing whether you have the original part or the degraded imitation, then yes, it is scandalous. Especially when the ECN tells buyers that the changes will have no impact. John

It is impressive that TI keeps parts in production for decades, almost

This part belongs in the 555 timer and uA741 and 2N3055 generation, getting creaky before most of my enginers were born. Or before their parents were born.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

Well you could use the tlv9362.

Cheers

Thanks for this warning. (S.

All great parts - technically obsolete but will be available forever from thousands of sources - if your application can use them then why use anything else?

piglet

Perhaps they were telling the truth and the others were stretching it a bit?

A firm I worked for often quoted specs that were so far below the actual performance that one of our sets almost met spec. with one of the transistors soldered in backwards. This understatement meant that their sets had a reputation for always meeting the specification - even after the customer had tried to 'improve' them.

It was only when the bean-counters began over-ruling the engineers that sets with better specs on paper but worse or unreliable performance began to out-sell them.

Seems unlikely.

Specs tend to reflect what you can test quickly rather than actual performance.

MOSFETs typically had picoamp leakage through the gate, but waiting for long enough for the leakage current to build up to a respectable voltage wasn't an option for production line testing.

The bean-counters mostly don't know what they are doing. This is - in practice - where the problems usually come from.

Educating managers is definitely part of an engineers job, and managers are remarkably resistant to the idea that they need education.

I'm not saying there isn't an alternative, I am saying that if they have to reduce the maximum supply voltage spec, or similar important ones, they should just say the old part is obsolete, and provide a new part number for whatever they can make.

NE5532

. . . . just in case somebody is actually searching for info on an actual part number.

If you're wired into the ON/TI/NXP PCN channels, you'll pick this up in time to remove the TI part number from your list of alternates.

Audio mfrs are pretty paranoid about sources. Chances are TI never showed up, in the first place.

RL

If I hadn’t stopped talking audio design seriously in about 1980, I certainly would have when crappy compressed MP3s took over the world.

Golden ears, my left buttock.

Cheers

Phil Hobbs

Your buttocks have ears?

I was very impressed with mp3 compression first time I heard it So many audio files on a small memory.

Same goes for MPEG compression for video.

Have you ever heard a Quad electrostat?

Have some old Sennheiser HD210 headphones too, good when practicing playing the keyboard.

...but it doesn't sound so good by the second or third generation.

The difference between the original AIFF file and a first generation mp3 at a moderate compression rate is audible when both are electrically recorded to a wax cylinder. Sometimes, when a 78 is transferred to mp3, the results can be excruciating because the algorithm favours the scratch over the music.

Legg snipped-for-privacy@nospam.Magma.Ca> wrote: |-----------------------------------------------| |"Audio mfrs are pretty paranoid about sources."| |-----------------------------------------------|

Dear RL,

Why?

With kind regards. (S.

Jan Panteltje snipped-for-privacy@comet.invalid schreef: |----------------------------------------------------------------| |"I was very impressed with mp3 compression first time I heard it| |So many audio files on a small memory. | | | |Same goes for MPEG compression for video." | |----------------------------------------------------------------|

Commonly used resources for MPEG-4 audio are defective. Cf. e.g.

Have you ever used 'sox' in Linux? From man sox NAME SoX - Sound eXchange, the Swiss Army knife of audio manipulation

SYNOPSIS sox [global-options] [format-options] infile1 [[format-options] infile2] ... [format-options] outfile [effect [effect-options]] ...

play [global-options] [format-options] infile1 [[format-options] infile2] ... [format-options] [effect [effect-options]] ...

rec [global-options] [format-options] outfile [effect [effect-options]] ...

DESCRIPTION Introduction SoX reads and writes audio files in most popular formats and can optionally apply effects to them. It can combine multiple input sources, synthesise audio, and, on many systems, act as a general purpose audio player or a multi-track audio recorder. It also has limited ability to split the input into multiple output files.

All SoX functionality is available using just the sox command. To simplify playing and recording audio, if SoX is invoked as play, the output file is automatically set to be the default sound device, and if invoked as rec, the default sound device is used as an input source. Additionally, the soxi(1) command provides a convenient way to just query audio file header information. The heart of SoX is a library called libSoX. Those interested in extending SoX or using it in other programs should refer to the libSoX manual page: libsox(3).

SoX is a command-line audio processing tool, particularly suited to making quick, simple edits and to batch processing. If you need an interactive, graphical audio editor, use audacity(1). I use it sometimes to make test signals, audio sweeps what not.

ffmpeg is useful too, as is mpg123, Much more free audio stuff exists for Linux: raspberrypi: ~ # apropos audio alsa_in (1) - Jack clients that perform I/O with an alternate audio interface alsa_out (1) - Jack clients that perform I/O with an alternate audio interface axfer-list (1) - dump lists of available sound devices and nodes to transfer audio data frame. axfer-transfer (1) - transferrer of audio data frame for sound devices and nodes. default.pa (5) - PulseAudio Sound Server Startup Script jack_monitor_client (1) - The JACK Audio Connection Kit example client jack_showtime (1) - The JACK Audio Connection Kit example client jack_simple_client (1) - The JACK Audio Connection Kit example client jack_unload (1) - The JACK Audio Connection Kit example client jackd (1) - JACK Audio Connection Kit sound server jackrec (1) - JACK toolkit client for recording audio lame (1) - create mp3 audio files mediainfo (1) - command line utility to display information about audio/video files mp3-decoder (1) - play audio MPEG 1.0/2.0/2.5 stream (layers 1, 2 and 3) mpg123 (1) - play audio MPEG 1.0/2.0/2.5 stream (layers 1, 2 and 3) mpg123-alsa (1) - play audio MPEG 1.0/2.0/2.5 stream (layers 1, 2 and 3) mpg123-jack (1) - play audio MPEG 1.0/2.0/2.5 stream (layers 1, 2 and 3) mpg123-nas (1) - play audio MPEG 1.0/2.0/2.5 stream (layers 1, 2 and 3) mpg123-openal (1) - play audio MPEG 1.0/2.0/2.5 stream (layers 1, 2 and 3) mpg123-oss (1) - play audio MPEG 1.0/2.0/2.5 stream (layers 1, 2 and 3) mpg123-portaudio (1) - play audio MPEG 1.0/2.0/2.5 stream (layers 1, 2 and 3) mpg123-pulse (1) - play audio MPEG 1.0/2.0/2.5 stream (layers 1, 2 and 3) mpg123.bin (1) - play audio MPEG 1.0/2.0/2.5 stream (layers 1, 2 and 3) out123 (1) - send raw PCM audio or a waveform pattern to an output device pacat (1) - Play back or record raw or encoded audio streams on a PulseAudio sound server pacmd (1) - Reconfigure a PulseAudio sound server during runtime pactl (1) - Control a running PulseAudio sound server padsp (1) - PulseAudio OSS Wrapper pamon (1) - Play back or record raw or encoded audio streams on a PulseAudio sound server paplay (1) - Play back or record raw or encoded audio streams on a PulseAudio sound server parec (1) - Play back or record raw or encoded audio streams on a PulseAudio sound server parecord (1) - Play back or record raw or encoded audio streams on a PulseAudio sound server pasuspender (1) - Temporarily suspend PulseAudio pax11publish (1) - PulseAudio X11 Credential Utility play (1) - Sound eXchange, the Swiss Army knife of audio manipulation pulse-cli-syntax (5) - PulseAudio Command Line Interface Syntax pulse-client.conf (5) - PulseAudio client configuration file pulse-daemon.conf (5) - PulseAudio daemon configuration file pulseaudio (1) - The PulseAudio Sound System qjackctl (1) - User interface for controlling JACK (Jack Audio Connection Kit) rec (1) - Sound eXchange, the Swiss Army knife of audio manipulation scsynth (1) - SuperCollider audio synthesis server sox (1) - Sound eXchange, the Swiss Army knife of audio manipulation soxeffect (7) - Sound eXchange, the Swiss Army knife of audio manipulation soxformat (7) - Sound eXchange, the Swiss Army knife of audio manipulation start-pulseaudio-x11 (1) - PulseAudio Sound Server X11 Startup Script raspberrypi: ~ #

And that is just the default install....

raspberrypi: ~ # apropos sound and all the stuff I wrote myself of course