Details

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BUY 27C64 https://www.utsource.net/itm/p/12605999.html

Parameter	Description
Device Type	27C64 is an UV erasable, electrically programmable read-only memory (EPROM)
Memory Capacity	8K x 8 bits (64 Kbit)
Vcc Supply Voltage	4.5V to 5.5V
Operating Temperature	-55掳C to +125掳C
Access Time	Typically 250ns
Programming Voltage	Vpp = 12.5V to 13.5V
Package Types	DIP (Dual Inline Package), PLCC (Plastic Leaded Chip Carrier)
Endurance	1,000 Program/Erase cycles
Data Retention	10 years at 25掳C

Instructions for Use

1. Powering the Device:

   • Connect Vcc (pin 20) to a supply voltage between 4.5V and 5.5V.
   • Connect Vss (pin 10) to ground.

2. Addressing:

   • Apply the desired address to the address lines (A0-A12).

3. Data Output:

   • Data can be read from the data output pins (D0-D7) after applying the correct address and enabling the chip select (/CE) and output enable (/OE) pins.

4. Programming:

   • To program the EPROM, use a suitable programmer that applies the necessary high voltage (Vpp) to the appropriate pin while setting the address and data lines.
   • Programming voltage (Vpp) should be between 12.5V and 13.5V.

5. Erase Cycle:

   • Erase the EPROM by exposing it to ultraviolet light for approximately 20 minutes through the window on the top of the package.

6. Handling Precautions:

   • Handle with care to avoid damage to the UV window or pins.
   • Use proper ESD (Electrostatic Discharge) precautions when handling the device.

7. Storage:

   • Store in a cool, dry place away from direct sunlight if not in use.

(For reference only)