CY7C1355A Datasheet | Cypress

Features - Zero Bus Latency, no dead cycles between write and read cycles - Fast access times: 2.5 ns, 3.0 ns, and 3.5 ns - Fast clock speed: 133, 117, and 100 MHz - Fast OE access time: 6.5, 7.0, and 7.5ns - Internally synchronized registered outputs eliminate the need to control OE - - - - - - - - - - - 3.3V - 5% and +5% power supply 3.3V or 2.5V I/O supply Single WEN (READ/WRITE) control pin Positive clock-edge triggered, address, data, and control signal registers for fully pipelined applications Interleaved or linear four-word burst capability Individual byte write (BWa- BWd) control (may be tied LOW) CEN pin to enable clock and suspend operations Three chip enables for simple depth expansion Automatic Power-down feature available using ZZ mode or CE deselect. JTAG boundary scan (except CY7C1357A) Low-profile 119-bump, 14-mm × 22-mm BGA (Ball Grid Array) for CY7C1355A, and 100-pin TQFP packages for both devices All synchronous inputs are gated by registers controlled by a positive-edge-triggered Clock Input (CLK). The synchronous inputs include all addresses, all data inputs, depth-expansion Chip Enables (CE, CE2, and CE3), Cycle Start Input (ADV/LD), Clock Enable (CEN), Byte Write Enables (BWa, BWb, BWc, and BWd), and read-write control (WEN). BWc and BWd apply to CY7C1355A only. Address and control signals are applied to the SRAM during one clock cycle, and one cycle later, its associated data occurs, either read or write. A Clock Enable (CEN) pin allows operation of the CY7C1355A/CY7C1357A to be suspended as long as necessary. All synchronous inputs are ignored when (CEN) is HIGH and the internal device registers will hold their previous values. There are three Chip Enable pins (CE, CE2, CE3) that allow the user to deselect the device when desired. If any one of these three are not active when ADV/LD is LOW, no new memory operation can be initiated and any burst cycle in progress is stopped. However, any pending data transfers (read or write) will be pleted....