TD100 delay line chip?

[Brad Parker]

The question about the ttl oscillator jogged my memory.

Anyone recognize a line of "delay line" chips with names like TD25,
TD50, TD100, etc...  The look they were expensive at the time, like $10
around 1976.

The TD100 pinout looks like this:

      +------+
input | 1 14 | vcc
      | 2 13 | 
      | 3 12 | 20ns
40ns  | 4 11 | 
      | 5 10 | 60s
80ns  | 6  9 | 
gnd   | 7  8 | 100ns
      +------+

I don't have an exact part number or mfg.  (I know where I can find one
but it's not easy and will take some work)

I want to model these in verilog but I'm not exactly sure how they work.
They are delay lines, but I'm not sure how they react.  The input seems
to be a short pulse from high to low of about 40ns.  I'm assuming this
produces an approx 40ns pulse after the prescibed delay, but I'm not
entirely sure.

I would love to see a few pages from a data book which describes how
these react (enough to model them correctly).

any pointers?

-brad