10 Jul
2007
10 Jul
'07
4:03 p.m.
On 10 Jul 2007 at 15:08, Ethan Dicks wrote:
On 7/9/07, Chuck Guzis <cclist at sydex.com>
wrote:
There are lots of 16-bit SRAMs, but (my mistake) not in a DIP style.
The Alliance AS7C1026 for instance gives you 64Kx16 bits in a 44 pin
TSOP SOJ--as fast as 10 nsec.
The DIPs seem to be restricted to 8 bit wide memories, such as the
Alliance AS7C1024 (128Kx8 in 32 pins 0.300 SOJ DIP found in the Zoom
56K modem). Just too many pins, I guess when the width goes to 16.
But why stop with 64Kx16 SRAM? There's the Maxwell 89C1632
512Kx32bit SRAM in a 68 pin QFP...
Cheers,
Chuck
OTOH, there's a nice 16bit SRAM in some
modems, such as the Hayes
28.8K external models. In an 0.300" wide DIP too.
Oooh... that could be fun to play with. I didn't figure that a cache
SRAM was anything other than 4-bits wide (386/486 era) or 8-bits wide
(486/Pentium era), especially since I've used a bog standard cache RAM
on an 1802, but knowing there really are 16-bit-wide SRAMs could be
fun for, say, a 68000-based board, or even throwing away 4 bits and
using it as a 12-bit-wide single part for a PDP-8.