IDT72T3685

• Choose among the following memory organizations:
   IDT72T3645  1,024 x 36
   IDT72T3655  2,048 x 36
   IDT72T3665  4,096 x 36
   IDT72T3675  8,192 x 36
   IDT72T3685  16,384 x 36
   IDT72T3695  32,768 x 36
   IDT72T36105  65,536 x 36
   IDT72T36115  131,072 x 36
   IDT72T36125  262,144 x 36
• Up to 225 MHz Operation of Clocks
• User selectable HSTL/LVTTL Input and/or Output
• 2.5V LVTTL or 1.8V, 1.5V HSTL Port Selectable Input/Ouput voltage
• 3.3V Input tolerant
• Read Enable & Read Clock Echo outputs aid high speed operation
• User selectable Asynchronous read and/or write port timing
• 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 candefault to one of eight preselected offsets
• Program programmable flags by either serial or parallel means
• Selectable synchronous/asynchronous timing modes for Almost-

The IDT72T3685 are exceptionally deep, extrememly highspeed, CMOS First-In-First-Out (FIFO) memories with clocked read and writecontrols and a flexible Bus-Matching x36/x18/x9 data flow. These FIFOs offerseveral key user benefits:
• Flexible x36/x18/x9 Bus-Matching on both read and write ports
• A user selectable MARK location for retransmit
• User selectable I/O structure for HSTL or LVTTL
• Asynchronous/Synchronous translation on the read or write ports
• The first word data latency period, from the time the first word is written to anempty FIFO to the time it can be read, is fixed and short.
• High density offerings up to 9 Mbit
Bus-Matching TeraSync FIFOs of the IDT72T3685 are particularly appropriate for network,video, telecommunications, datacommunications and other applications thatneed to buffer large amounts of data and match busses of unequal sizes.