Forums

LPC2138

Started by subb...@gmail.com December 17, 2008
Hi,
Is it a wise decision to use LPC2138 for new design? I need to choose a device, which will have supply/support for another 15 years.. Will NXP supply/support LPC2138 for another 15 years. Or will they vanish soon. Any known issues with LPC21238. Flash data retention for 15 years?

Thanks in advance.
Regards,
Subbiah

An Engineer's Guide to the LPC2100 Series

s...@gmail.com schrieb:
> Hi,
> Is it a wise decision to use LPC2138 for new design? I need to choose
>
a device, which will have supply/support for another 15 years.. Will NXP
supply/support LPC2138 for another 15 years. Or will they vanish soon.

15years ?? I don't know of any CPU which is supported such long.
I'd say you need to build up some stock yourself.

--
42Bastian

Note: SPAM-only account, direct mail to bs42@...

Hi,

> s...@gmail.com schrieb:
> > Hi,
> > Is it a wise decision to use LPC2138 for new design? I need to choose
> >
> a device, which will have supply/support for another 15 years.. Will NXP
> supply/support LPC2138 for another 15 years. Or will they vanish soon.
>
> 15years ?? I don't know of any CPU which is supported such long.

I'd say 8051s will be around in 15 years. Those bloody things won't die.

--
Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
CrossWorks for ARM, MSP430, AVR, MAXQ, and now Cortex-M3 processors
On Wed, 17 Dec 2008 05:42:29 -0500, you wrote:

>Hi,
>Is it a wise decision to use LPC2138 for new design? I need to choose a device, which will have supply/support for another 15 years.. Will NXP supply/support LPC2138 for another 15 years. Or will they vanish soon. Any known issues with LPC21238. Flash data retention for 15 years?
>
>Thanks in advance.
>Regards,
>Subbiah

15 years is a lot to expect for any part. Obviously you should be using the /01 version as the
original will almost certainly not be available.

If it's a low-volume product, buy plenty of stock when a last-time buy notice arrives. For higher
volumes, you should be able to afford a redesign around a new part.
The important thing is to manage your supply chain properly so you know well in advance if a part
goes obsolete so you can find a solution in plenty of time, instead of having a sudden panic when
the part is no longer available.

s...@gmail.com ha scritto:
>
> Hi, Is it a wise decision to use LPC2138 for new design? I need to
> choose a device, which will have supply/support for another 15
> years.. Will NXP supply/support LPC2138 for another 15 years. Or will
> they vanish soon. Any known issues with LPC21238. Flash data
> retention for 15 years?
In general terms Philips was a good partner for digital ICs and 8051
derivatives have a long life and considering that 2138 is quite general
mcu probably it will have a long life. The will be its price during a so
long time and probably you or some other will re-engineer the product
before 15 years to reduce cost or to increase performance. So initially
you have to be sure to use 2138 for not more then 60-70% of its memory,
i/o and computing power and may be that also respecting these conditions
your product will be re-engineered before 15 years almost 3 times.
>
> Thanks in advance. Regards, Subbiah
>
> -------------------------
> 12.28
>


----Original Message----
From: l...
[mailto:l...] On Behalf Of Paul Curtis
Sent: 17 December 2008 10:51 To: l...
Subject: RE: [lpc2000] LPC2138

> Hi,
>
> > s...@gmail.com schrieb:
> > > Hi,
> > > Is it a wise decision to use LPC2138 for new design?
> > > I need to choose
> > >
> > a device, which will have supply/support for another 15
> > years.. Will
> > NXP supply/support LPC2138 for another 15 years. Or
> > will they vanish soon.
> >
> > 15years ?? I don't know of any CPU which is supported
> > such long.
>
> I'd say 8051s will be around in 15 years. Those bloody
> things won't die.

One of our customers is still manufacturing an 8051-based product we
designed in 1993. The actual device used has changed from time to time,
as has the software, but pin-compatible devices are still very much
available.

You might be able to still buy something pin-compatible with LPC2138 in
15 years... NXP/Philips do not have a good record for maintaining
backward compatibility in my experience though.
--
Tim Mitchell
Paul Curtis schrieb:

>> 15years ?? I don't know of any CPU which is supported such long.
>
> I'd say 8051s will be around in 15 years. Those bloody things won't die.

Yes, but as the same chip ? The core yes , you can see it in
smart-cards, USB-to-rs232 controllers and all such.

Maybe you can get an ARM7TDMI device in 10years but a today's uC ?
--
42Bastian

Note: SPAM-only account, direct mail to bs42@...

Hi,

> Paul Curtis schrieb:
>
> >> 15years ?? I don't know of any CPU which is supported such long.
> >
> > I'd say 8051s will be around in 15 years. Those bloody things won't
die.
>
> Yes, but as the same chip ? The core yes , you can see it in
> smart-cards, USB-to-rs232 controllers and all such.

Dallas will be making them, and still on steroids. There's only so much
horsepower you can add to a soapbox before it blows itself apart.

--
Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
CrossWorks for ARM, MSP430, AVR, MAXQ, and now Cortex-M3 processors

----Original Message----
From: l...
[mailto:l...] On Behalf Of Paul Curtis
Sent: 17 December 2008 11:12 To: l...
Subject: RE: [lpc2000] LPC2138

> Hi,
>
> > Paul Curtis schrieb:
> >
> > > > 15years ?? I don't know of any CPU which is
> > > > supported such long.
> > >
> > > I'd say 8051s will be around in 15 years. Those
> > > bloody things won't die.
> >
> > Yes, but as the same chip ? The core yes , you can see
> > it in smart-cards, USB-to-rs232 controllers and all
> > such.
>
> Dallas will be making them, and still on steroids.
> There's only so much horsepower you can add to a soapbox
> before it blows itself apart.

Atmel still has a big range of basic 8051 based parts which are pin
compatible (yes, 40 pin DIP!) with the original 8051.
8051 was factory programmed ROM, Atmel don't have one of those but they
do have an 8031 which uses external eprom, or 8052 which is OTP-ROM with
an additional timer.

There's lots of stuff out there still being made with 8051 in 40-pin
DIP.

--
Tim Mitchell
----- Original Message -----
From: "Paul Curtis"
To:
Sent: Wednesday, December 17, 2008 10:51 AM
Subject: RE: [lpc2000] LPC2138
> Hi,
>
>> s...@gmail.com schrieb:
>> > Hi,
>> > Is it a wise decision to use LPC2138 for new design? I need to choose
>> >
>> a device, which will have supply/support for another 15 years.. Will NXP
>> supply/support LPC2138 for another 15 years. Or will they vanish soon.
>>
>> 15years ?? I don't know of any CPU which is supported such long.
>
> I'd say 8051s will be around in 15 years. Those bloody things won't die.
I think that PICs have been around almost as long. GI originally designed it
as a peripheral controller for their rather nice16-bit processor.

Leon