GR3281 non-volatile RAM
256k (32k x 8)
Greenwich Instruments designed and manufactured 256k non-volatile memory module
Image is for illustrative purposes only.
The GR3281 is a 32768 word by 8 bits (32k x 8) non-volatile static RAM fabricated from advanced silicon gate CMOS technology and a high reliability lithium power cell.
The 28W dil pinout 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 4.5V. 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 15 microseconds to power down from 5V to 0V. This is much faster than any 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 being the shelf life of the lithium power cell, typically 10 years
When powered down the GR3281 is transportable and data can be moved from system to system. Being pin compatible with the 27256 EPROM it is ideal for program development, data collection in data loggers, program changes in process control, automation and robotics and user defineable look-up tables etc.
For further information please email Greenwich Instruments Ltd.
Address: Meridian House, Park Road, Swanley, Kent, BR8 8AH United Kingdom Tel: 0843 289 4056* Fax: 0843 289 4783*
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