Functional Description
The GS840Z18/36AT is a 4Mbit Synchronous Static SRAM. GSIs 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 device is switched from read to write cycles.

Features
• 256K x 18 and 128K x 36 configurations
• User configurable Pipeline and Flow Through mode
• NBT (No Bus Turn Around) functionality allows zero wait read-write-read bus utilization
• Fully pin compatible with both pipelined and flow through NtRAM™, NoBL™ and ZBT™ SRAMs
• Pin-compatible with 2M, 8M and 16M devices
• 3.3 V +10%/–5% core power supply
• 2.5 V or 3.3 V I/O supply
• LBO pin for Linear or Interleave Burst mode
• Byte write operation (9-bit Bytes)
• 3 chip enable signals for easy depth expansion
• Clock Control, registered address, data, and control
• ZZ Pin for automatic power-down
• JEDEC-standard 100-lead TQFP package
• Pb-Free 100-lead TQFP package available