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List:       classiccmp
Subject:    Re: Apple II no video display
From:       Ethan Dicks via cctalk <cctalk () classiccmp ! org>
Date:       2017-10-27 20:26:03
Message-ID: CAALmim=8eY_YYUaZdHie_BZjoyBZR8=kDF2m_2U+BP-PEnadMQ () mail ! gmail ! com
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On Fri, Oct 27, 2017 at 4:13 PM, Brent Hilpert via cctalk
<cctalk@classiccmp.org> wrote:
> 74S is faster than 74LS, 74LS was combining low power techniques (which result in \
> loss of speed) with Schottky technology to get some of the lost speed back, to get \
> a better speed-power product than 'normal' TTL.

Right.  My bad there.

> The chronological order of development was 74 --> 74H & L --> 74S --> 74LS

I do recall that progression.  I've even seen a couple of 74L parts
(and there are more than a couple 74H parts in a 1968 PDP-8)

-ethan


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