INTRODUCTION
The QCOTS™ UT8Q512K32 Quantified Commercial Off-the-Shelf product is a high-performance 2M byte (16Mbit) CMOS static RAM multi-chip module (MCM), organized as four individual 524,288 x 8 bit SRAMs with a common output enable. Memory expansion is provided by an active LOW chip enable (En), an active LOW output enable (G), and three-state drivers. This device has a power down feature that reduces power consumption by more than 90% when deselected.
Writing to each memory is accomplished by taking the chip enable (En) input LOW and write enable ( Wn) inputs LOW. Data on the I/O pins is then written into the location specified on the address pins (A0 through A18). Reading from the device is accomplished by taking the chip enable (En) and output enable (G) LOW while forcing write enable (Wn) HIGH. Under these conditions, the contents of the memory location specified by the address pins will appear on the I/O pins.
The input/output pins are placed in a high impedance state when the device is deselected (En HIGH), the outputs are disabled (G HIGH), or during a write operation (En LOW and Wn LOW). Perform 8, 16, 24 or 32 bit accesses by making Wn along with En a common input to any combination of the discrete memory die.

FEATURES
❐ 25ns maximum (3.3 volt supply) address access time
❐ MCM contains four (4) 512K x 8 industry-standard asynchronous SRAMs; the control architecture allows operation as 8, 16, 24, or 32-bit data width
❐ TTL compatible inputs and output levels, three-state bidirectional data bus
❐ Typical radiation performance
   - Total dose: 50krads
   - SEL Immune >80 MeV-cm2/mg
   - LETTH(0.25) = >10 MeV-cm2/mg
   - Saturated Cross Section cm2 per bit, 5.0E-9
       - <1E-8 errors/bit-day, Adams 90% geosynchronous heavy ion
❐ Packaging options:
   - 68-lead dual cavity ceramic quad flatpack (CQFP) - (weight 7.37 grams)
❐ Standard Microcircuit Drawing5962-01533
   - QML T and Q compliant part