GS8644ZV72C

The GS8644ZV18/36/72 is a 72Mbit Synchronous Static SRAM. GSI's NBT SRAMs, like ZBT, NtRAM, NoBL or other pipelined read/double late write or flow through read/ single late write SRAMs, allow utilization of all available bus bandwidth by eliminating the need to insert deselect cycles when the GS8644ZV18/36/72 is switched from read to write cycles.

Because GS8644ZV18/36/72 is a synchronous device, address, data inputs, and read/write control inputs are captured on the rising edge of the input clock. Burst order control (LBO) must be tied to a power rail for proper operation. Asynchronous inputs of GS8644ZV18/36/72 include the Sleep mode enable (ZZ) and Output Enable. Output Enable can be used to override the synchronous control of the output drivers and turn the RAM's output drivers off at any time. Write cycles are internally self-timed and initiated by the rising edge of the clock input. GS8644ZV18/36/72 feature eliminates complex offchip write pulse generation required by asynchronous SRAMs and simplifies input signal timing.

The GS8644ZV18/36/72 may be configured by the user to operate in Pipeline or Flow Through mode. Operating as a pipelined synchronous device, in addition to the rising-edgetriggered registers that capture input signals, the GS8644ZV18/36/72 incorporates a rising edge triggered output register. For read cycles, pipelined SRAM output data is temporarily stored by the edge-triggered output register during the access cycle and then released to the output drivers at the next rising edge of clock.

The GS8644ZV18/36/72 is implemented with GSI's high performance CMOS technology and is available in a JEDECstandard 119-bump, 165-bump or 209-bump BGA package.