henry@utzoo.UUCP (Henry Spencer) (09/11/85)
Here's a summary of the replies I got from my inquiry about FIFO chips.
The Z8060 is real, and is second-sourced by AMD. (One possible worry:
Zilog is for sale, with its future uncertain.) The Z8060 apparently does
tend to run rather hot, though, with 200mA or so of power needed. It is
also a bit slow, although that's not very important for my application.
The 2812 is 32x8 and is made by AMD and Plessey, but needs -12V.
The preferred choice seems to be the Mostek MK4501, second-sourced by IDT.
It's 512x9, has tri-state, single supply, respectably fast. It too is
a bit of a power hog, 200mA or so, and it's in a 28-pin package. Otherwise,
it looks good. 1024x9 versions are coming.
The TRW 1030 is not second-sourced.
Several people mentioned the old MMI parts, second-sourced by various
people, but there were some disparaging comments about power dissipation,
small size (they are x4), and cost.
The TI 74S22_ series was mentioned, although there is some uncertainty
about whether it still exists. It too is 4 bits wide.
The RCA 40105 was mentioned, likewise a forthcoming 74HC(T)40105.
Both CMOS. No indication of second source.
The Signetics 8X60 is a chip that makes a static RAM act like a FIFO.
The RAM can be made quite large. There was an allusion to a similar,
perhaps identical, chip from MMI. This is not the compact-and-simple
solution I was after, but may be of interest for other applications.
Finally, there was mention of the SY2130 1024x8 dual-port RAM made by
Synertek and apparently second-sourced by IDT.
--
Henry Spencer @ U of Toronto Zoology
{allegra,ihnp4,linus,decvax}!utzoo!henry