You take an adversarial approach. What you call "Component Police" is actually just using good design practice while noticing that the product has to ship. "Favored Vendors" are the ones who deliver product to production in time to meet customer requirements. It also helps to be cost effective so we can pay overheads including ourselves.
I once looked at switching a diode package which would help design for manufacture. It turned out the desired component which was an industry standard was 26 weeks lead time when we had 250K of the other in stock. I did not change it and kept my friends in purchasing and logistics still as friends.
As with most things the Component Engineering function is a question of balance.
Considering the needs of Engineering, Sourcing, Quality, Test, Manufacturing, Field Service, Marketing and Manufacturer/Vendor.
Maintaining appropriate & consistent levels of quality.
Overall cost of component (initial price, long term price trending, quality, defect rate, short and long term availability, toxicity, ease of use, end of life terms, alternate sources that are form, fit & function compliant, agency approvals, industy standard, etc..).
Does the component lifecycle match your product life? Does the manufacturer discontinue almost as many components as they release?
Engineering investments in currently used components such as firmware, software, design expertise, mechanicals, unique functionality, regulatory compliance...
Fostering awareness of component lifecycles for various product areas, industrial, consumer, hi-rel, automotive, wireless, etc..
Online avalability of comprehensive component information, complete part number, data sheet, package dimensions, tape and reel dwg, pricing, inventory, sample ordering, lifecycle, levels of information provided that does not necessitate a call or email to manufactuer that is diverted to voicemail or answered by automated email away message.
My favorite manufacturer is those that meet all of the above and tries to understand the customer products and personalties, provide appropriate product information in a passive, effective manner, does not hound via phone calls, spam, unplanned visits. Does not feel the need to provide cheap pens that require 110 lbs of pressure to expel ink or conversely leak, various sizes of calenders, and other personalized landfill garbage from China.
I'm also available for hire, Componentengineering@yahoo.com
At Northern Telecom everybody hated the Components Engineering department. But I saw many times where they would assist and educate a young and green engineer who didn't understand how to specify components.
One of my favourites was when the quartz-crystal engineer had to educate some designers that crystal load capacitances were standardized and they couldn't just pick any value they liked.
Another time a colleague had to have a resistor go through the full qualification process, lasting several months. While that resistor family was widely used in the company that *value* had never been used before. He was told they couldn't expidite the process.
When Nortel started to collapse, Components Engineering were one of the first groups to be cut. High management figured that function could be performed by the contract manufacturers then being brought in. Bad mistake on top of another, and everyone knows the company's end result.
Back about 1971, one of my co-workers was an incredible self taught analog designer. He did his sophisticated analog designs using large graph paper on a drafting table, calculating all offsets and temperature drifts graphically. His low power 16 bit A/D converters were stable to better than 1 LSb through the -55C to 125C temperature range of our Tenney chamber, performance unheard of in the day.
When he decided to move on to greener pastures, I volunteered to take over his latest project. Going over his documentation, I was shocked to see that he had over 150 different resistor values on the board. While I realized the need for critical values in his analog chain, I cornered him on why he had used different resistor values for every one of his pullups. It seems he was an equal opportunity designer. When picking resistors from our supply, he picked only those values that had the most stock in our bins, in other words those poor lonely values which nobody else used. He had done the same for his selection of transistors. To my relief he didn't object to my simplification of the parts list to a dozen resistor values and substituting 2N2222 and 2N2907A transistors where applicable.
While our development lab didn't have a component police force to serve and protect us, I would certainly have welcomed one as a major time saver in picking components.
@anon the quartz-crystal engineer had to educate some designers that crystal load capacitances were standardized
Had a person in the procurement department ask why my VCXO had to be that exact and expensive part number when everybody else was using much cheaper voltage-controlled-crystal-oscillators. I had to explain the difference between a frequency controlled type of oscillator for a PLL vs the types with a simple on/tristate control voltage.
Wow, a 74F logic device made by Signetics. Beautiful! The Signetics 4000 CMOS, HCMOS, and Philips FTTL books use to grace my databook shelf. And they had a wealth of information in them, not just on parts, but also on topics like ESD and latchup. It is difficult to do a component engineering job well. The component engineer is between a rock and a hard place (Design Engineering and Procurement). They need to ensure a part is chosen that will work in the circuit, is cost competitive, and will not cause supply chain problems. If they do their job well, they get to focus more on the new design part of the job, and less on the sustaining engineering part. A good component engineer will help ensure that parts are operated at their Recommended Operating Conditions, and not at the Absolute Maximum Ratings where functionality and life may be impaired. A good component engineer can be the difference between hunting down and finding a difficult to find replacement for an obsolete part in a circuit, and having to redesign the whole circuit because no replacement part can be found. A good component engineer may know a manufacturer's product line better than the sales person for that line.
The late Bob Pease addressed the subject in one of his monthly essays:
One of the reasons I gave at customer trainings for switching to Programmable Array Logic from 7400 TTL was to get around the component police. Get them to add a few PAL devices and you never had to push for a new 7400 component to be added to the approved list again.
In fact, at the end of the training I would drop the TI 7400 data book into the trash can. Always got a good response...
Wow, a 74F logic device made by Signetics. Beautiful! The Signetics 4000 CMOS, HCMOS, and Philips FTTL books use to grace my databook shelf. And they had a wealth of information in them, not just on parts, but also on topics like ESD and latchup.
antedeluvian, I wish I still had those databooks. Let's just say that my boss was one of those types that preferred a "clean office" to a "comprehensive office", which was understandable as data migrated to the internet. :) I believe Signetics may have also had an ALS/AS TTL book, which I may also have had, and this was probably a very rare book. Hmmm...what is this? A predecessor to the one I had appears to be on line:
It looks like other Signetics databooks can be accessed by editing the link, and other companies databooks can be accessed by further editing. It would be nice if some semi company could archive such data in an offical online museum.
It was kind of a badge of honor ro have a full set of books.
I had TI's huge TTL book, RCA/Harris HC/HCT and AC/ACT logic books, National and Fairchild's set of logic books, and of course Motorola's. My second level boss had worked for Motorola and designed some of their ECL logic devices. Every once in awhile he would wander into our area sit down in my or my coworkers' guest chair, kick back, put his feet on our desk, pull out a stick of chewing gum with measured precision, and start lecturing about purple plague and rat-holing in silicon stepping. He was a knowledgable and fun guy.
It looks like you are creating quite a scanned in library. Maybe there is some free cloud drive space you can put them on and make them accessable to the public.
Maybe there is some free cloud drive space you can put them on and make them accessable to the public.
There is something like that now on Internet Archive. Unfortnately I can't link to a particular comment to take you right there, but if you go back to my blog and look for my comment on 1/30/2014 you will find the links.
January 2016 Cartoon Caption ContestBob's punishment for missing his deadline was to be tied to his chair tantalizingly close to a disconnected cable, with one hand superglued to his desk and another to his chin, while the pages from his wall calendar were slowly torn away.122 comments