The GR3281 is an industrial temperature range 32,768 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.

ROHS Compliant.

Units	Per unit
5 - 19	£70.19
20 - 49	£68.35
50 - 99	£66.61
100 +	£64.94

Select all	Attribute	Value
	Brand	Greenwich Instruments
	Memory Size	256kbit
	Organisation	32K 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
	Minimum Operating Temperature	-40 °C
	Minimum Operating Supply Voltage	4.75 V
	Number of Bits per Word	8bit
	Number of Words	32K

	Select all
	Brand Greenwich Instruments
	Memory Size 256kbit
	Organisation 32K 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
	Minimum Operating Temperature -40 °C
	Minimum Operating Supply Voltage 4.75 V
	Number of Bits per Word 8bit
	Number of Words 32K

Greenwich Instruments 256kbit 70ns NVRAM, 28-Pin PDIP, GR3281-HT

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