One of the most popular EPROM memories of the past is the 2716 2k x 8, whose pinout with practical use is shown in the figure. The 11 address lines allow access to the 2048 memory locations where 8-bit words are recorded. To read what is recorded in this memory, we must take pins OE (output enable) and CE (chip enable) to the LO level. Applying the levels corresponding to the address in these inputs, we obtain in the outputs the information recorded in the address. To record, the corresponding value is entered in the address entry and in the L / O entries what is to be recorded. So, we take CE to the LO level for exactly 50 milliseconds. A 25 V source must be connected to the VP pin for this purpose. After recording, the VP pin must be brought to 5 V of supply voltage.
