New subject: SCSI sector size

9 Dec 2010

...
  Subject: Re: 1970s TTL specs and prices
 To: cctalk at classiccmp.org
 Message-ID: <4D006B2A.5090407 at bitsavers.org>
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 On 8/20/10 11:23 AM, Tom Gardner wrote:
  For some Computer History Museum work I need
information on 7400 series  Flip
  Flops (S and Normal, DIPs) circa 1973 (anything
1970-75).  Anyone have  any
  maximum clock speed and OEM volume pricing
information on parts such as  7473
  thru 79 or 74106-116?

 At introduction (May 1966) The 7474 (25Mhz toggle freq) was $11.40, $9.10,
 $7.70
 quantity 1/25/100, respectively

 The most expensive TI TTL part at that time was the 7491 9 bit shift
 register at
 $31.25, $24.85, $21.25

 Their most expensive IC was the linear SN354A Demodulator/Chopper at
 $145, $116, $99
 ------------------------------ There is a fairly complete set of IC Masters at the
UC's Northern Reference
Library Facility, Richmond CA, http://www.lib.berkeley.edu/NRLF/.  They have
a public reading room and will pre-pull material per an email request,
nrlfreq at library.berkeley.edu. 

As it turns out I will be there next week doing some research on DRAM using
all the IC Masters and can see what is in the 1973 version about various
TTL.

FWIW, I frequently use a learning (pricing) curve off a per 100 price to get
a reasonable estimate of the high volume OEM price.  You will have to
justify the learning percentage (2% to 10%) and the OEM volume (multiple of
annual volume of a high volume system?) to come up with a price.  For
example using the 1966 7474 at $7.70 with a 5% learning curve and a 100,000
OEM volume has an estimated OEM price of $4.60.  You will have to do some
research and thinking to come up with the values u use.

Tom