GR3281 datasheet, PDF - EEWORLD Datasheet

GR3281: Description32768 word by 8 bits (32K x 8) non-volatile CMOS Static Ram; File Size149KB，2 Pages; ManufacturerETC2

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GR3281 Overview

32768 word by 8 bits (32K x 8) non-volatile CMOS Static Ram

GR3281

Page 1 of 2

GR3281

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23rd April 1999

DESCRIPTION

The GR3281 is a 32768 word by 8 bits (32K 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

GR3281 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 GR3281 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 GR3281.The GR3281 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

http://www.greenwichinst.com/gr3281.html

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