Functional description

The AS7C33256PFS16A and AS7C33256PFS18A are high performance CMOS 4 Mbit synchronous Static Random Access Memory (SRAM) devices organized as 262,144 words × 16 or 18 bits and incorporate a pipeline for highest frequency on any given technology.

Features

• Organization: 262,144 words × 16 or 18 bits

• Fast clock speeds to 166 MHz in LVTTL/LVCMOS

• Fast clock to data access: 3.5/3.8/4.0/5.0 ns

• Fast OE access time: 3.5/3.8/4.0/5.0 ns

• Fully synchronous register-to-register operation

• “Flow-through” mode

• Single-cycle deselect

- Dual-cycle deselect also available (AS7C33256PFD16A/AS7C33256PFD18A)

• Pentium®* compatible architecture and timing

• Asynchronous output enable control

• Economical 100-pin TQFP package

• Byte write enables

• Multiple chip enables for easy expansion

• 3.3V core power supply

• 2.5V or 3.3V I/O operation with separate VDDQ

• 30 mW typical standby power in power down mode

• NTD™* pipeline architecture available (AS7C33256NTD16A/AS7C33256NTD18A)