CY7C199-15DMB - 32K x 8 Static RAM

Functional Description

The CY7C199 is a high-performance CMOS static RAM

organized as 32,768 words by 8 bits. Easy memory expansion 

is provided by an active LOW Chip Enable (CE) and active

LOW Output Enable (OE) and three-state drivers. This device

has an automatic power-down feature, reducing the power

consumption by 81% when deselected. The CY7C199 is in the

standard 300-mil-wide DIP, SOJ, and LCC packages.

An active LOW Write Enable signal (WE) controls the

writing/reading operation of the memory. When CE and WE

inputs are both LOW, data on the eight data input/output pins

(I/O0 through I/O7) is written into the memory location

addressed by the address present on the address pins (A0

through A14). Reading the device is accomplished by selecting

the device and enabling the outputs, CE and OE active LOW,

while WE remains inactive or HIGH. Under these conditions,

the contents of the location addressed by the information on

address pins are present on the eight data input/output pins.

The input/output pins remain in a high-impedance state unless

the chip is selected, outputs are enabled, and Write Enable

(WE) is HIGH. A die coat is used to improve alpha immunity.