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Functional Description

The CY7C1354A and CY7C1356A SRAMs are designed to eliminate dead cycles when transitioning from Read to Write or vice versa. These SRAMs are optimized for 100 bus utilization and achieve Zero Bus Latency? (ZBL?)/No Bus Latency? (NoBL?). They integrate 262,144 × 36 and 524,288 × 18 SRAM cells, respectively, with advanced synchronous peripheral circuitry and a two-bit counter for internal burst operation. These employ high-speed, low-power CMOS designs using advanced triple-layer polysilicon, double-layer metal technology. Each memory cell consists of four transistors and two high-valued resistors.

Features

? Zero Bus Latency?, no dead cycles between Write and Read cycles

? Fast clock speed: 200, 166, 133, 100 MHz

? Fast access time: 3.2, 3.6, 4.2, 5.0 ns

? Internally synchronized registered outputs eliminate the need to control OE

? Single 3.3V –5 and +5 power supply VCC

? Separate VCCQ for 3.3V or 2.5V I/O

? 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 select

? JTAG boundary scan

? Low-profile 119-bump, 14-mm × 22-mm BGA (Ball Grid Array), and 100-pin TQFP packages