The CY7C281A is a plug-in replacements for bipolar devices and offer the advantages of lower power, superior performance, and programming yield. The EPROM cell requires only 12.5V for the super voltage, and low current requirements allow for gang programming. The EPROM cells allow each memory location to be tested 100% because each location is written into, erased, and repeatedly exercised prior to encapsulation. Each PROM is also tested for AC performance to guarantee that after customer programming, the product will meet DC and AC specification limits. Reading is accomplished by placing an active LOW signal on CS1 and CS2, and active HIGH signals on CS3 and CS4. The contents of the memory location addressed by the address lines (A0-A9) will become available on the output lines (O0-O7).