The GR881 is an industrial temperature range 8192 word by 8 bits (8k 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 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 4.5V. 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 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 GR881.

The GR881 can, without external power, retain data almost indefinitely; the limiting factor being the shelf life of the lithium power cell, typically 10 years.

ROHS Compliant

Units	Per unit	Per Box*
20 - 40	£82.971	£1,659.42
60 - 80	£76.332	£1,526.64
100 - 180	£70.227	£1,404.54
200 - 480	£64.609	£1,292.18
500 +	£59.441	£1,188.82

Select all	Attribute	Value
	Brand	Greenwich Instruments
	Memory Size	64kbit
	Organisation	8K x 8 bit
	Interface Type	Parallel
	Data Bus Width	8bit
	Maximum Random Access Time	70ns
	Mounting Type	Through Hole
	Package Type	PDIP
	Pin Count	28
	Dimensions	37 x 18 x 7.3mm
	Length	37mm
	Width	18mm
	Height	7.3mm
	Maximum Operating Supply Voltage	5.5 V
	Maximum Operating Temperature	+85 °C
	Number of Bits per Word	8bit
	Minimum Operating Supply Voltage	4.75 V
	Minimum Operating Temperature	-40 °C
	Number of Words	8K

	Select all
	Brand Greenwich Instruments
	Memory Size 64kbit
	Organisation 8K x 8 bit
	Interface Type Parallel
	Data Bus Width 8bit
	Maximum Random Access Time 70ns
	Mounting Type Through Hole
	Package Type PDIP
	Pin Count 28
	Dimensions 37 x 18 x 7.3mm
	Length 37mm
	Width 18mm
	Height 7.3mm
	Maximum Operating Supply Voltage 5.5 V
	Maximum Operating Temperature +85 °C
	Number of Bits per Word 8bit
	Minimum Operating Supply Voltage 4.75 V
	Minimum Operating Temperature -40 °C
	Number of Words 8K

Greenwich Instruments 64kbit 70ns NVRAM, 28-Pin PDIP, GR881-HT

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