CYM1464

Features:

• High-density 4-megabit SRAM module
• High-speed CMOS SRAMs
-Access time of 20 ns
• Low active power
-1.93W (max.)
• JEDEC-compatible pinout
• 32-pin, 0.6-inch-wide DIP package
• TTL-compatible inputs and outputs
• Low profile
-Max. height of 0.34 inches


Pinout




Specifications

Storage Temperature ......................................................... −55°C to +125°C
Ambient Temperature with Power Applied............................. −10°C to +85°C
Supply Voltage to Ground Potential ............................................−0.5V to +7.0V
DC Voltage Applied to Outputs in High Z State............................−0.5V to +7.0V
DC Input Voltage ........................................................................−0.5V to +7.0V


Description

The CYM1464 is a high-performance 4-megabit static RAM module organized as 512K words by 8 bits. The CYM1464 is constructed using four 256K x 4 static RAMs in SOJ packages mounted on an epoxy laminate substrate with pins.

Writing to the CYM1464 is accomplished when the chip select (CS) and write enable (WE) inputs are both LOW. Data on the eight input/output pins (I/O0 through I/O7) of the CYM1464 is written into the memory location specified on the address pins (A0 through A18). Reading the device is accomplished by taking chip select and output enable (OE) LOW, while write enable (WE) remains inactive or HIGH. Under these conditions, the contents of the memory location specified on the address pins (A0 through A18) will appear on the eight appropriate data input/output pins (I/O0 through I/O7).

The input/output pins of the CYM1464 remain in a high-impedance state unless the CYM1464 is selected, outputs are enabled, and write enable (WE) is HIGH.