CY7C4292 Datasheet | Cypress

.. CY7C4282 CY7C4292 64K/128K x 9 Deep Sync FIFOs with Retransmit and Depth Expansion Features - High-speed, low-power, first-in first-out (FIFO) memories - 64K × 9 (CY7C4282) - 128K × 9 (CY7C4292) - 0.5-micron CMOS for optimum speed/power - High-speed, near-zero latency (true dual-ported memory cell), 100-MHz operation (10-ns read/write cycle times) - Low power - ICC=40 m A - ISB = 2 m A - Fully asynchronous and simultaneous read and write operation - Empty, Full, and Programmable Almost Empty and Almost Full status flags - TTL-patible - Retransmit function - Output Enable (OE) pin - Independent read and write enable pins - Supports free-running 50% duty cycle clock inputs - Width-Expansion Capability - Depth-Expansion Capability through token-passing scheme (no external logic required) - 64-pin 10 × 10 STQFP Functional Description The CY7C4282/CY7C4292 are high-speed, low-power, FIFO memories with clocked read and write interfaces. All devices are nine bits wide. The CY7C4282/CY7C4292 can be cascaded to increase FIFO depth. Programmable Features include Almost Full/Almost Empty flags. These FIFOs provide solutions for a wide variety of data buffering needs, including high-speed data acquisition, multiprocessor interfaces, video and munications buffering. These FIFOs have 9-bit input and output ports that are controlled by separate clock and enable signals. The input port is controlled by a free-running clock (WCLK) and a write-enable pin (WEN). Retransmit and Synchronous Almost Full/Almost Empty flag Features are available on these devices. Depth expansion is possible using the cascade input (XI), cascade output (XO), and First Load (FL) pins. The XO pin is connected to the XI pin of the next device, and the XO pin of the last device should be connected to the XI pin of the first device. The FL pin of the first device is tied to VSS and the FL pin of all the remaining devices should be tied to VCC. When WEN is asserted, data is written...