S
server
Guest
https://www.dropbox.com/sh/iqv13jlolwj9nm8/AAAQ95PWFrNab0PjNscwIsjZa?dl=0
This thing costs 4 cents. Or used to.
This thing costs 4 cents. Or used to.
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A
Anthony William Sloman
Guest
On Wednesday, August 31, 2022 at 1:46:35 PM UTC+10, jla...@highlandsniptechnology.com wrote:
https://www.onsemi.com/pdf/datasheet/nc7wz17-d.pdf
John Larkin doesn\'t read data sheets, and doesn\'t think that anybody else should (or ever has) either.
That version of the datasheet is copyrighted to 2019. The package data goes back to 2010.
--
Bill Sloman, Sydney
https://www.dropbox.com/sh/iqv13jlolwj9nm8/AAAQ95PWFrNab0PjNscwIsjZa?dl=0
This thing costs 4 cents. Or used to.
https://www.onsemi.com/pdf/datasheet/nc7wz17-d.pdf
John Larkin doesn\'t read data sheets, and doesn\'t think that anybody else should (or ever has) either.
That version of the datasheet is copyrighted to 2019. The package data goes back to 2010.
--
Bill Sloman, Sydney
P
Phil Hobbs
Guest
jlarkin@highlandsniptechnology.com wrote:
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
https://www.dropbox.com/sh/iqv13jlolwj9nm8/AAAQ95PWFrNab0PjNscwIsjZa?dl=0
This thing costs 4 cents. Or used to.
Not bad for 1999.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
M
Mike Monett VE3BTI
Guest
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
2022: CAD$0.59 QTY 1 Mouser
https://octopart.com/search?q=nc7wz17¤cy=CAD&specs=0
--
MRM
jlarkin@highlandsniptechnology.com wrote:
https://www.dropbox.com/sh/iqv13jlolwj9nm8/AAAQ95PWFrNab0PjNscwIsjZa?dl=0
This thing costs 4 cents. Or used to.
Not bad for 1999.
Cheers
Phil Hobbs
2022: CAD$0.59 QTY 1 Mouser
https://octopart.com/search?q=nc7wz17¤cy=CAD&specs=0
--
MRM
P
Phil Hobbs
Guest
Mike Monett VE3BTI wrote:
Nobody but the grey market folks has any stock. Mouser is expecting 12
parts in February 2024.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
jlarkin@highlandsniptechnology.com wrote:
https://www.dropbox.com/sh/iqv13jlolwj9nm8/AAAQ95PWFrNab0PjNscwIsjZa?dl=0
This thing costs 4 cents. Or used to.
Not bad for 1999.
Cheers
Phil Hobbs
2022: CAD$0.59 QTY 1 Mouser
https://octopart.com/search?q=nc7wz17¤cy=CAD&specs=0
Nobody but the grey market folks has any stock. Mouser is expecting 12
parts in February 2024.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
S
server
Guest
On Wed, 31 Aug 2022 10:36:17 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
Maybe they shrunk it since then.
Even the first dip-packaged AC and ACT parts were fierce sub-ns
drivers. I don\'t understand why the max specified delays are so slow,
5.6 ns prop delay in this case with 1.6 measured. Tr and Tf are
unspecified.
So to get performance, one tests real parts and decides how much risk
to take.
5.6 ns would be a problem in the 1to8 clock distribution thing we\'re
doing. Assuming absolute worst-case on all the parts just wouldn\'t
work.
We\'re characterizing real prop delays on some new FPGAs too. The tools
are wildly pessimistic or just silent.
Has anyone seen faster edges from a CMOS gate?
<pcdhSpamMeSenseless@electrooptical.net> wrote:
jlarkin@highlandsniptechnology.com wrote:
https://www.dropbox.com/sh/iqv13jlolwj9nm8/AAAQ95PWFrNab0PjNscwIsjZa?dl=0
This thing costs 4 cents. Or used to.
Not bad for 1999.
Maybe they shrunk it since then.
Cheers
Phil Hobbs
Even the first dip-packaged AC and ACT parts were fierce sub-ns
drivers. I don\'t understand why the max specified delays are so slow,
5.6 ns prop delay in this case with 1.6 measured. Tr and Tf are
unspecified.
So to get performance, one tests real parts and decides how much risk
to take.
5.6 ns would be a problem in the 1to8 clock distribution thing we\'re
doing. Assuming absolute worst-case on all the parts just wouldn\'t
work.
We\'re characterizing real prop delays on some new FPGAs too. The tools
are wildly pessimistic or just silent.
Has anyone seen faster edges from a CMOS gate?
S
server
Guest
On Wed, 31 Aug 2022 10:50:46 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
We have 5K in stock so should be OK for a while. I\'d expect all their
prop delays to be similar, being purchased together.
<pcdhSpamMeSenseless@electrooptical.net> wrote:
Mike Monett VE3BTI wrote:
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
jlarkin@highlandsniptechnology.com wrote:
https://www.dropbox.com/sh/iqv13jlolwj9nm8/AAAQ95PWFrNab0PjNscwIsjZa?dl=0
This thing costs 4 cents. Or used to.
Not bad for 1999.
Cheers
Phil Hobbs
2022: CAD$0.59 QTY 1 Mouser
https://octopart.com/search?q=nc7wz17¤cy=CAD&specs=0
Nobody but the grey market folks has any stock. Mouser is expecting 12
parts in February 2024.
Cheers
Phil Hobbs
We have 5K in stock so should be OK for a while. I\'d expect all their
prop delays to be similar, being purchased together.
M
Mike Monett VE3BTI
Guest
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
WinSource has plenty. They are based in Hong Kong, but so what. Most
semiconductors are made in China anyway.
Yes, you have to worry about counterfeits, but you can get them from
anywhere. That\'s the reason for using Mouser or Digi-Key for production.
Texas Instruments has a drop-in replacement that is readily available, but
it is pricey:
https://octopart.com/search?q=SN74LVC2G17¤cy=CAD&specs=0
An alternative is to design the part out. Two 7404 inverters with feedback
can give just about any amount of hysteresis needed, or a 7414 followed
with a 7404.
Any designer is going to check availability before designing a part in, so
the problem is confined to old units. Repair means only one or two may be
needed at a time, or simply scrap the unit.
Logic glue is going away, so the function may be replaced with an FPGA or
ASIC, or a microcontroller such as the STM32. There\'s all kinds of options,
so the solution is to not throw up your hands and say it can\'t be done.
--
MRM
Nobody but the grey market folks has any stock. Mouser is expecting 12
parts in February 2024.
Cheers
Phil Hobbs
WinSource has plenty. They are based in Hong Kong, but so what. Most
semiconductors are made in China anyway.
Yes, you have to worry about counterfeits, but you can get them from
anywhere. That\'s the reason for using Mouser or Digi-Key for production.
Texas Instruments has a drop-in replacement that is readily available, but
it is pricey:
https://octopart.com/search?q=SN74LVC2G17¤cy=CAD&specs=0
An alternative is to design the part out. Two 7404 inverters with feedback
can give just about any amount of hysteresis needed, or a 7414 followed
with a 7404.
Any designer is going to check availability before designing a part in, so
the problem is confined to old units. Repair means only one or two may be
needed at a time, or simply scrap the unit.
Logic glue is going away, so the function may be replaced with an FPGA or
ASIC, or a microcontroller such as the STM32. There\'s all kinds of options,
so the solution is to not throw up your hands and say it can\'t be done.
--
MRM
L
Lasse Langwadt Christensen
Guest
onsdag den 31. august 2022 kl. 18.38.52 UTC+2 skrev Mike Monett VE3BTI:
https://lcsc.com/product-detail/Buffers-Drivers_Texas-Instruments-SN74LVC2G17DBVR_C10429.html
16791 in stock, US$0.0884 for 1000+
Phil Hobbs <pcdhSpamM...@electrooptical.net> wrote:
Nobody but the grey market folks has any stock. Mouser is expecting 12
parts in February 2024.
Cheers
Phil Hobbs
WinSource has plenty. They are based in Hong Kong, but so what. Most
semiconductors are made in China anyway.
Yes, you have to worry about counterfeits, but you can get them from
anywhere. That\'s the reason for using Mouser or Digi-Key for production.
Texas Instruments has a drop-in replacement that is readily available, but
it is pricey:
https://octopart.com/search?q=SN74LVC2G17¤cy=CAD&specs=0
https://lcsc.com/product-detail/Buffers-Drivers_Texas-Instruments-SN74LVC2G17DBVR_C10429.html
16791 in stock, US$0.0884 for 1000+
P
Phil Hobbs
Guest
Mike Monett VE3BTI wrote:
Oh, lots of folks list them. Whether you get the same silicon is always
a crap shoot, especially in 2022. Rochester I\'m okay with, except for
the $300 per line item minimum.
But not at subnanosecond speed!
Nah, there are all sorts of places where a gate or two is just the right
medicine.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
Nobody but the grey market folks has any stock. Mouser is expecting 12
parts in February 2024.
Cheers
Phil Hobbs
WinSource has plenty. They are based in Hong Kong, but so what. Most
semiconductors are made in China anyway.
Oh, lots of folks list them. Whether you get the same silicon is always
a crap shoot, especially in 2022. Rochester I\'m okay with, except for
the $300 per line item minimum.
Yes, you have to worry about counterfeits, but you can get them from
anywhere. That\'s the reason for using Mouser or Digi-Key for production.
Texas Instruments has a drop-in replacement that is readily available, but
it is pricey:
https://octopart.com/search?q=SN74LVC2G17¤cy=CAD&specs=0
An alternative is to design the part out. Two 7404 inverters with feedback
can give just about any amount of hysteresis needed, or a 7414 followed
with a 7404.
But not at subnanosecond speed!
Any designer is going to check availability before designing a part in, so
the problem is confined to old units. Repair means only one or two may be
needed at a time, or simply scrap the unit.
Logic glue is going away, so the function may be replaced with an FPGA or
ASIC, or a microcontroller such as the STM32. There\'s all kinds of options,
so the solution is to not throw up your hands and say it can\'t be done.
Nah, there are all sorts of places where a gate or two is just the right
medicine.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
P
Phil Hobbs
Guest
Lasse Langwadt Christensen wrote:
the ones JL posted. The onsemi ones were several times faster than the
datasheet limit.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
Would be worth checking out, but there\'s no guarantee they\'re fast likeonsdag den 31. august 2022 kl. 18.38.52 UTC+2 skrev Mike Monett VE3BTI:
Phil Hobbs <pcdhSpamM...@electrooptical.net> wrote:
Nobody but the grey market folks has any stock. Mouser is expecting 12
parts in February 2024.
Cheers
Phil Hobbs
WinSource has plenty. They are based in Hong Kong, but so what. Most
semiconductors are made in China anyway.
Yes, you have to worry about counterfeits, but you can get them from
anywhere. That\'s the reason for using Mouser or Digi-Key for production.
Texas Instruments has a drop-in replacement that is readily available, but
it is pricey:
https://octopart.com/search?q=SN74LVC2G17¤cy=CAD&specs=0
https://lcsc.com/product-detail/Buffers-Drivers_Texas-Instruments-SN74LVC2G17DBVR_C10429.html
16791 in stock, US$0.0884 for 1000+
the ones JL posted. The onsemi ones were several times faster than the
datasheet limit.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
P
Phil Hobbs
Guest
jlarkin@highlandsniptechnology.com wrote:
My fave FIN1018 line receivers have faster edges, around 400 ps.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
On Wed, 31 Aug 2022 10:36:17 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:
jlarkin@highlandsniptechnology.com wrote:
https://www.dropbox.com/sh/iqv13jlolwj9nm8/AAAQ95PWFrNab0PjNscwIsjZa?dl=0
This thing costs 4 cents. Or used to.
Not bad for 1999.
Maybe they shrunk it since then.
Cheers
Phil Hobbs
Even the first dip-packaged AC and ACT parts were fierce sub-ns
drivers. I don\'t understand why the max specified delays are so slow,
5.6 ns prop delay in this case with 1.6 measured. Tr and Tf are
unspecified.
So to get performance, one tests real parts and decides how much risk
to take.
5.6 ns would be a problem in the 1to8 clock distribution thing we\'re
doing. Assuming absolute worst-case on all the parts just wouldn\'t
work.
We\'re characterizing real prop delays on some new FPGAs too. The tools
are wildly pessimistic or just silent.
Has anyone seen faster edges from a CMOS gate?
My fave FIN1018 line receivers have faster edges, around 400 ps.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
M
Mike Monett VE3BTI
Guest
Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:
Good catch. I searched LCSC and Jotrin for the original part, but forgot to
check for the TI part.
--
MRM
https://lcsc.com/product-detail/Buffers-Drivers_Texas-Instruments-SN74LVC
2G17DBVR_C10429.html
16791 in stock, US$0.0884 for 1000+
Good catch. I searched LCSC and Jotrin for the original part, but forgot to
check for the TI part.
--
MRM
M
Mike Monett VE3BTI
Guest
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
Of course not. I expect you to substitute your favorite AUC or AVC. Besides,
Lasse found the TI part at LCSC.
A schmidt part is usually only needed on I/O ports. These rarely go to 1GHz.
I rack my brain, but I can\'t find any need for non-inverting hysteresis on
internal circuitry, except for RC multivibrators. These normally don\'t go to
1GHz.
--
MRM
An alternative is to design the part out. Two 7404 inverters with feedback
can give just about any amount of hysteresis needed, or a 7414 followed
with a 7404.
But not at subnanosecond speed!
Of course not. I expect you to substitute your favorite AUC or AVC. Besides,
Lasse found the TI part at LCSC.
A schmidt part is usually only needed on I/O ports. These rarely go to 1GHz.
I rack my brain, but I can\'t find any need for non-inverting hysteresis on
internal circuitry, except for RC multivibrators. These normally don\'t go to
1GHz.
--
MRM
L
Lasse Langwadt Christensen
Guest
onsdag den 31. august 2022 kl. 19.52.23 UTC+2 skrev Phil Hobbs:
the SN74LVC2G17 datasheet list 2.2ns/5.4ns min/max @ 3.3V and 1.5ns/4.3ns min/max @ 5V -40\'C-85\'C, 50pf/500R
the NC7WZ17 datasheet list 7.3ns max @3.3V and 6.2ns max @5V with no minimums -40\'C-85\'C, 50pf/500R
so on paper Johns part look slower, but who knows
Lasse Langwadt Christensen wrote:
onsdag den 31. august 2022 kl. 18.38.52 UTC+2 skrev Mike Monett VE3BTI:
Phil Hobbs <pcdhSpamM...@electrooptical.net> wrote:
Nobody but the grey market folks has any stock. Mouser is expecting 12
parts in February 2024.
Cheers
Phil Hobbs
WinSource has plenty. They are based in Hong Kong, but so what. Most
semiconductors are made in China anyway.
Yes, you have to worry about counterfeits, but you can get them from
anywhere. That\'s the reason for using Mouser or Digi-Key for production.
Texas Instruments has a drop-in replacement that is readily available, but
it is pricey:
https://octopart.com/search?q=SN74LVC2G17¤cy=CAD&specs=0
https://lcsc.com/product-detail/Buffers-Drivers_Texas-Instruments-SN74LVC2G17DBVR_C10429.html
16791 in stock, US$0.0884 for 1000+
Would be worth checking out, but there\'s no guarantee they\'re fast like
the ones JL posted. The onsemi ones were several times faster than the
datasheet limit.
the SN74LVC2G17 datasheet list 2.2ns/5.4ns min/max @ 3.3V and 1.5ns/4.3ns min/max @ 5V -40\'C-85\'C, 50pf/500R
the NC7WZ17 datasheet list 7.3ns max @3.3V and 6.2ns max @5V with no minimums -40\'C-85\'C, 50pf/500R
so on paper Johns part look slower, but who knows
P
Phil Hobbs
Guest
Lasse Langwadt Christensen wrote:
His pictures are showing 600 ps edges. Some LVDS line receivers are
faster--my late fave FIN1018 is around 400 ps.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
onsdag den 31. august 2022 kl. 19.52.23 UTC+2 skrev Phil Hobbs:
Lasse Langwadt Christensen wrote:
onsdag den 31. august 2022 kl. 18.38.52 UTC+2 skrev Mike Monett VE3BTI:
Phil Hobbs <pcdhSpamM...@electrooptical.net> wrote:
Nobody but the grey market folks has any stock. Mouser is expecting 12
parts in February 2024.
Cheers
Phil Hobbs
WinSource has plenty. They are based in Hong Kong, but so what. Most
semiconductors are made in China anyway.
Yes, you have to worry about counterfeits, but you can get them from
anywhere. That\'s the reason for using Mouser or Digi-Key for production.
Texas Instruments has a drop-in replacement that is readily available, but
it is pricey:
https://octopart.com/search?q=SN74LVC2G17¤cy=CAD&specs=0
https://lcsc.com/product-detail/Buffers-Drivers_Texas-Instruments-SN74LVC2G17DBVR_C10429.html
16791 in stock, US$0.0884 for 1000+
Would be worth checking out, but there\'s no guarantee they\'re fast like
the ones JL posted. The onsemi ones were several times faster than the
datasheet limit.
the SN74LVC2G17 datasheet list 2.2ns/5.4ns min/max @ 3.3V and 1.5ns/4.3ns min/max @ 5V -40\'C-85\'C, 50pf/500R
the NC7WZ17 datasheet list 7.3ns max @3.3V and 6.2ns max @5V with no minimums -40\'C-85\'C, 50pf/500R
so on paper Johns part look slower, but who knows
His pictures are showing 600 ps edges. Some LVDS line receivers are
faster--my late fave FIN1018 is around 400 ps.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
P
Phil Hobbs
Guest
Mike Monett VE3BTI wrote:
Squaring up slower logic before reclocking, for instance.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
An alternative is to design the part out. Two 7404 inverters with feedback
can give just about any amount of hysteresis needed, or a 7414 followed
with a 7404.
But not at subnanosecond speed!
Of course not. I expect you to substitute your favorite AUC or AVC. Besides,
Lasse found the TI part at LCSC.
A schmidt part is usually only needed on I/O ports. These rarely go to 1GHz.
I rack my brain, but I can\'t find any need for non-inverting hysteresis on
internal circuitry, except for RC multivibrators. These normally don\'t go to
1GHz.
Squaring up slower logic before reclocking, for instance.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
M
Mike Monett VE3BTI
Guest
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
Maybe for a 1 Hz oscillator, but even then a 74AC14 would work.
--
MRM
Squaring up slower logic before reclocking, for instance.
Cheers
Phil Hobbs
Maybe for a 1 Hz oscillator, but even then a 74AC14 would work.
--
MRM
J
John Larkin
Guest
On Wed, 31 Aug 2022 14:22:53 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
This tiny flop is crazy:
https://www.dropbox.com/sh/gyn0nz486fmqp1s/AAB5kwDWJ1VR8EXMjGRHs4iEa?dl=0
Prop delay is spec\'d 1 ns typ.
<pcdhSpamMeSenseless@electrooptical.net> wrote:
Lasse Langwadt Christensen wrote:
onsdag den 31. august 2022 kl. 19.52.23 UTC+2 skrev Phil Hobbs:
Lasse Langwadt Christensen wrote:
onsdag den 31. august 2022 kl. 18.38.52 UTC+2 skrev Mike Monett VE3BTI:
Phil Hobbs <pcdhSpamM...@electrooptical.net> wrote:
Nobody but the grey market folks has any stock. Mouser is expecting 12
parts in February 2024.
Cheers
Phil Hobbs
WinSource has plenty. They are based in Hong Kong, but so what. Most
semiconductors are made in China anyway.
Yes, you have to worry about counterfeits, but you can get them from
anywhere. That\'s the reason for using Mouser or Digi-Key for production.
Texas Instruments has a drop-in replacement that is readily available, but
it is pricey:
https://octopart.com/search?q=SN74LVC2G17¤cy=CAD&specs=0
https://lcsc.com/product-detail/Buffers-Drivers_Texas-Instruments-SN74LVC2G17DBVR_C10429.html
16791 in stock, US$0.0884 for 1000+
Would be worth checking out, but there\'s no guarantee they\'re fast like
the ones JL posted. The onsemi ones were several times faster than the
datasheet limit.
the SN74LVC2G17 datasheet list 2.2ns/5.4ns min/max @ 3.3V and 1.5ns/4.3ns min/max @ 5V -40\'C-85\'C, 50pf/500R
the NC7WZ17 datasheet list 7.3ns max @3.3V and 6.2ns max @5V with no minimums -40\'C-85\'C, 50pf/500R
so on paper Johns part look slower, but who knows
His pictures are showing 600 ps edges. Some LVDS line receivers are
faster--my late fave FIN1018 is around 400 ps.
Cheers
Phil Hobbs
This tiny flop is crazy:
https://www.dropbox.com/sh/gyn0nz486fmqp1s/AAB5kwDWJ1VR8EXMjGRHs4iEa?dl=0
Prop delay is spec\'d 1 ns typ.
L
Lasse Langwadt Christensen
Guest
onsdag den 31. august 2022 kl. 20.23.02 UTC+2 skrev Phil Hobbs:
yeh, seems the datasheet is barely half the story
and the datasheet on TI site say Tpd 1ns min @5V for the 74LVC2G17
and 0.7ns min @5V for the 74LVC1G17
Lasse Langwadt Christensen wrote:
onsdag den 31. august 2022 kl. 19.52.23 UTC+2 skrev Phil Hobbs:
Lasse Langwadt Christensen wrote:
onsdag den 31. august 2022 kl. 18.38.52 UTC+2 skrev Mike Monett VE3BTI:
Phil Hobbs <pcdhSpamM...@electrooptical.net> wrote:
Nobody but the grey market folks has any stock. Mouser is expecting 12
parts in February 2024.
Cheers
Phil Hobbs
WinSource has plenty. They are based in Hong Kong, but so what. Most
semiconductors are made in China anyway.
Yes, you have to worry about counterfeits, but you can get them from
anywhere. That\'s the reason for using Mouser or Digi-Key for production.
Texas Instruments has a drop-in replacement that is readily available, but
it is pricey:
https://octopart.com/search?q=SN74LVC2G17¤cy=CAD&specs=0
https://lcsc.com/product-detail/Buffers-Drivers_Texas-Instruments-SN74LVC2G17DBVR_C10429.html
16791 in stock, US$0.0884 for 1000+
Would be worth checking out, but there\'s no guarantee they\'re fast like
the ones JL posted. The onsemi ones were several times faster than the
datasheet limit.
the SN74LVC2G17 datasheet list 2.2ns/5.4ns min/max @ 3.3V and 1.5ns/4.3ns min/max @ 5V -40\'C-85\'C, 50pf/500R
the NC7WZ17 datasheet list 7.3ns max @3.3V and 6.2ns max @5V with no minimums -40\'C-85\'C, 50pf/500R
so on paper Johns part look slower, but who knows
His pictures are showing 600 ps edges. Some LVDS line receivers are
yeh, seems the datasheet is barely half the story
and the datasheet on TI site say Tpd 1ns min @5V for the 74LVC2G17
and 0.7ns min @5V for the 74LVC1G17