CY7199-25VCT by Cypress Semiconductor Corporation
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.
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.
FEATURES:
- High speed — 10 ns
- Fast tDOE
- CMOS for optimum speed/power
- Low active power — 467 mW (max, 12 ns “L” version)
- Low standby power — 0.275 mW (max, “L” version)
- TTL-compatible inputs and outputs
- Automatic power-down when deselected
These parts are new and unused -- excellent condition.
