4K x 8 Dual-Port Static RAM and 4K x 8 Dual-Port SRAM
CY7C135, CY7C135A CY7C1342
4K x 8 Dual-Port Static RAM and 4K x 8 Dual-Port SRAM with Semaphores
Features
■ True dual-p...
Description
CY7C135, CY7C135A CY7C1342
4K x 8 Dual-Port Static RAM and 4K x 8 Dual-Port SRAM with Semaphores
Features
■ True dual-ported memory cells, which allow simultaneous reads of the same memory location
■ 4K x 8 organization ■ 0.65 micron CMOS for optimum speed and power ■ High speed access: 15 ns ■ Low operating power: ICC = 160 mA (max) ■ Fully asynchronous operation ■ Automatic power down ■ Semaphores included on the 7C1342 to permit software
handshaking between ports ■ Available in 52-pin PLCC ■ Pb-free packages available
Logic Block Diagram
R/WL CEL OEL
Functional Description
The CY7C135/135A[1] and CY7C1342 are high speed CMOS 4K x 8 dual-port static RAMs. The CY7C1342 includes semaphores that provide a means to allocate portions of the dual-port RAM or any shared resource. Two ports are provided permitting independent, asynchronous access for reads and writes to any location in memory. Application areas include interprocessor/multiprocessor designs, communicatio...
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