CY7C199

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</a>) and active LOW Output Enable (OE</a>) 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</a>) of CY7C199 controls the writing/reading operation of the memory. When CE</a> and WE</a>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 CY7C199 is accomplished by selecting the CY7C199 and enabling the outputs, CE</a> and OE</a> active LOW,while WE</a> 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 of CY7C199 remain in a high-impedance state unless the chip is selected, outputs are enabled, and Write Enable (WE</a> ) is HIGH. A die coat is used to improve alpha immunity.