FEATURES:

• Choose among the following memory organizations:

IDT72T1845 ⎯ 2,048 x 18/4,096 x 9

IDT72T1855 ⎯ 4,096 x 18/8,192 x 9

IDT72T1865 ⎯ 8,192 x 18/16,384 x 9

IDT72T1875 ⎯ 16,384 x 18/32,768 x 9

IDT72T1885 ⎯ 32,768 x 18/65,536 x 9

IDT72T1895 ⎯ 65,536 x 18/131,072 x 9

IDT72T18105 ⎯ 131,072 x 18/262,144 x 9

IDT72T18115 ⎯ 262,144 x 18/524,288 x 9

IDT72T18125 ⎯ 524,288 x 18/1,048,576 x 9

• Up to 225 MHz Operation of Clocks

• User selectable HSTL/LVTTL Input and/or Output

• Read Enable & Read Clock Echo outputs aid high speed operation

• User selectable Asynchronous read and/or write port timing

• 2.5V LVTTL or 1.8V, 1.5V HSTL Port Selectable Input/Ouput voltage

• 3.3V Input tolerant

• Mark & Retransmit, resets read pointer to user marked position

• Write Chip Select (WCS) input enables/disables Write operations

• Read Chip Select (RCS) synchronous to RCLK

• Programmable Almost-Empty and Almost-Full flags, each flag can

default to one of eight preselected offsets

• Program programmable flags by either serial or parallel means

• Selectable synchronous/asynchronous timing modes for Almost-

Empty and Almost-Full flags