Path: utzoo!attcan!uunet!know!samsung!dali.cs.montana.edu!milton!whit
From: whit@milton.u.washington.edu (John Whitmore)
Newsgroups: sci.electronics
Subject: Re: EPROM equiv. of 24SA10 needed
Message-ID: <7611@milton.u.washington.edu>
Date: 15 Sep 90 03:58:25 GMT
References: <29507@netnews.upenn.edu>
Organization: University of Washington, Seattle
Lines: 22

In article <29507@netnews.upenn.edu> depolo@eniac.seas.upenn.edu (Jeff DePolo) writes:
>I'm looking for a drop-in replacement EPROM for a TI 24SA10 PROM.  The
>24SA10 is also cross-referenced as <several different part numbers>
>Signetics 82S126
>It's 1K (256x4) OC output PROM, 16 pins. 

	This is a bipolar fuse-programmed PROM; its rated speed is 50
nanoseconds, and it's gonna be HARD to get anything that fast (or that
small) in an EPROM.  Best bet is a high-tech EEPROM; Xicor makes one
model (X2816H) with comparable speed (70 ns guaranteed, 45 ns typical).
	The X2816 is a 2k by 8-bit part, so it'll take some socket
conversion (make a daughterboard for the chip with a wire-wrap socket
that matches the 24SA10; the wire-wrap prongs will plug into the
motherboard socket).  The X2816, in turn, can be programmed in
most EPROM programmers (and erased, of course, electrically).
	Unless you're planning a LOT of changes, it'll be cheaper
to buy the equivalent PROMs and program them; these parts are
relatively inexpensive at $3.60 each (from Active Electronics).
Active will even program them for you for an extra buck per chip,
if you can generate the data in one of their favored formats.

	John Whitmore