GR881
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GR881
DESCRIPTION
The GR881 is a 8192 word by 8 bits (8K 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 GR881 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 GR881 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 S (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 GR881.The GR881 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
GR881
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APPLICATION
When powered down, the GR881 is transportable and data can be moved from system to system, this makes
it ideal for programme development, data collection in data loggers, programme changes in process control,
automation and robotics and user definable lookup tables, etc.
Additional information available through our technical sevices department.
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