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From: Oliver Betz on 14 Dec 2009 03:16 Vladimir Vassilevsky wrote: [...] >Motorola/Freescale is good with old parts availabitity, too. Intel and Ack. See http://www.freescale.com/productlongevity - they assure a life cycle of at least 10 years for standard parts and 15 years for "automotive" controllers. This - and the availability of many 5V parts - is a huge advantage for my long-lived industrial applications with analog signal processing operating in noisy environments. I remember only one case where a Motorola EOL caused some headache - the MC68HC811E2 got no drop-in successor. >Atmel are the opposite: they drop product lines just like it. > >> assume this means that they still have the old fab equipment to make >> some of those ancient parts like the SPO256A-AL2 and CTS256... > >I guess Freescale redesigns old parts for new technologies. How could I don't think so. The process is known and you have to migrate to newer parts to get smaller, cheaper chips (and new bugs, of course). >you explain that modern HC12 de-facto can run at ~70MHz, while old >datasheet specifies 25 MHz? "Old" HC12 devices also ran much faster than specified. The data sheet is very conservative. Oliver -- Oliver Betz, Munich despammed.com might be broken, use Reply-To:
From: Paul Carpenter on 14 Dec 2009 06:58 In article <hg3mar$dcf$1(a)aioe.org>, not.going.to.be(a)seen.com says... .... > Motogorilla is notorious about being lax on specs on their > "newer" parts. Everything is "typ" -- nothing *guaranteed* > (I guess it gives them an out if something doesn't work as > *you* expect it would: "Well, there's no guaranteed max/min > on that parameter -- and we don't test it, either!") > > I can recall avoiding '05s for an issue like this (IRC, > something in the reset circuit that I wanted to exploit > "outside the box") NXP is just as bad, best I had was a USB hub chip that had loose specs for TTL and Schmitt inputs, but NOTHING told you which inputs were what type. -- Paul Carpenter | paul(a)pcserviceselectronics.co.uk <http://www.pcserviceselectronics.co.uk/> PC Services <http://www.pcserviceselectronics.co.uk/fonts/> Timing Diagram Font <http://www.gnuh8.org.uk/> GNU H8 - compiler & Renesas H8/H8S/H8 Tiny <http://www.badweb.org.uk/> For those web sites you hate
From: Ulf Samuelsson on 14 Dec 2009 08:41 Vladimir Vassilevsky skrev: > > > larwe wrote: > >> On Dec 13, 11:00 am, Mike Harrison <m...(a)whitewing.co.uk> wrote: >> >> >>> Microchip has historically scored very well in this regard, despite >>> the huge number >> >> >> Their unofficial boast is that they have never discontinued a part. I > > Motorola/Freescale is good with old parts availabitity, too. Intel and > Atmel are the opposite: they drop product lines just like it. The AT91 product line is fairly stable, and has been so since it started. The AVRs 0.5u was droppped but there are other examples like the ATmega8 which has seen production for quite some time now. When Atmel announced the new AVR "A" range, it was announced that the older parts would remain in production. Seem to remember a $10 bet on that an XMEGA would be obsolete within one year. Time to collect soon ? >> assume this means that they still have the old fab equipment to make >> some of those ancient parts like the SPO256A-AL2 and CTS256... > > I guess Freescale redesigns old parts for new technologies. How could > you explain that modern HC12 de-facto can run at ~70MHz, while old > datasheet specifies 25 MHz? > > VLV > Ulf Samuelsson Personal Opinion - as always.
From: Ulf Samuelsson on 14 Dec 2009 08:42 Vladimir Vassilevsky skrev: > > > larwe wrote: > >> On Dec 13, 11:00 am, Mike Harrison <m...(a)whitewing.co.uk> wrote: >> >> >>> Microchip has historically scored very well in this regard, despite >>> the huge number >> >> >> Their unofficial boast is that they have never discontinued a part. I > > Motorola/Freescale is good with old parts availabitity, too. Intel and > Atmel are the opposite: they drop product lines just like it. The AT91 product line is fairly stable, and has been so since it started. The AVRs 0.5u was droppped but there are other examples like the ATmega8 which has seen production for quite some time now. When Atmel announced the new AVR "A" range, it was announced that the older parts would remain in production. Seem to remember a $10 bet on that an XMEGA would be obsolete within one year. Time to collect soon ? >> assume this means that they still have the old fab equipment to make >> some of those ancient parts like the SPO256A-AL2 and CTS256... > > I guess Freescale redesigns old parts for new technologies. How could > you explain that modern HC12 de-facto can run at ~70MHz, while old > datasheet specifies 25 MHz? > > VLV > Ulf Samuelsson Personal Opinion - as always.
From: Ulf Samuelsson on 14 Dec 2009 08:58
> NXP have just released 5V LPC9xx series models, as they > move to fix one blind spot, (but it is clear their main effort is > behind M0/M3 - M0's already show at Digikey). > Winbond (now called Nuvoton) has a growing family of 80C51, again > covering 5V. > > It is rare to see 5V M3/M0, so Vcc is becoming one 8:32 delimiter. The forthcoming AVR32 based AT32UC3C runs at 5V, so there are exceptions to that rule. > SRAM size is another : 4-8K is where most 8051's top-out, and pin- > count has most devices at and under 32 pins being 8 bits, and very few > 32/33 pin ARM offerings. > > -jg -- Best Regards Ulf Samuelsson These are my own personal opinions, which may or may not be shared by my employer Atmel Nordic AB |