[time-nuts] lunatic fringe time standards

J. Forster jfor at quik.com
Mon Apr 19 15:40:49 EDT 2010


RTL was a VERY simple design. a 2 input NAND had 2 transistors and 3
resistors as I remember.

The main issue was lead attachment was the main failure mode in the
epoxy-ceramic 8 lead packages. If you twisted a lead, the device died.

-John

==============


> I stand corrected. On reflection, I seem to remember a lower supply
> voltage
> on the RTL, although 3.6 doesn't ring a bell. Do remember that it was very
> temperamental logic family. Used to get lots of catastrophic failures on
> the
> DMM product range (which I believe SD acquired from Fairchild).
>
> Rob
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Chuck Harris
> Sent: 19 April 2010 5:57 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] lunatic fringe time standards
>
> DTL had essentially the same specs as TTL.  It was an evolutionary step.
>
> RTL was a strange beast, and ran off of 3.6V.  There is no inherent reason
> that there couldn't have been multiple families that used different
> supplies,
> but I only remember the 3.6V variety.
>
> -Chuck Harris
>
> Rob Kimberley wrote:
>> RTL and DTL used 5.0V. I used to service Systron-Donner kit back in the
>> early 70's, and we had a bunch of RTL and DTL stuff.
>>
>> Rob K
>
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