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Número de pieza | GR281 | |
Descripción | 2048 x 8-Bit Non-Volatile CMOS Static RAM | |
Fabricantes | Greenwich | |
Logotipo | ||
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GR281
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DESCRIPTION
The GR281 is a 2048 word by 8 bits (2K x 8) non-volatile CMOS Static Ram, fabricated from advanced
silicon gate CMOS technology and a high reliability lithium power cell.The pin-out of the GR281 conforms
to the JEDEC standards and is fully compatible with normal static RAM.The power down circuit is fully
automatic and is referenced at 4.5 volts. At this point the GR281 is write protected by an internal inhibit
function for Data Protection and the memory contents are retained by the lithium power source.Power down
is very fast, this being essential for data integrity, taking a maximum of 15 µS (15 microseconds) to power
down from 5 volts to 0 volts. This is much faster than system power failure conditions. Therefore there are
no special conditions required when installing the GR281.The GR281 can, without external power, retain
data almost indefinitely. The limiting factor will be the shelf life of the lithium cell, which is typically ten
years. It is possible that this figure may be extended in view of the extremely light duty imposed upon the
cell.
TECHNICAL DATA
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27/11/01
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Páginas | Total 2 Páginas | |
PDF Descargar | [ Datasheet GR281.PDF ] |
Número de pieza | Descripción | Fabricantes |
GR281 | 2048 x 8-Bit Non-Volatile CMOS Static RAM | Greenwich |
GR281 | Non Volatile Memory | Greenwich Instruments |
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