Details

---

BUY AT27C256R-15JI https://www.utsource.net/itm/p/12594147.html

Parameter	Description
Device Type	256 K-Bit (32K x 8) CMOS Electrically Erasable and Reprogrammable PROM
Package Type	JEDEC Standard 28-Pin Plastic Dual In-Line Package (PDIP)
Operating Voltage (Vcc)	4.5V to 5.5V
Programming Voltage (Vpp)	12.0V to 13.0V
Access Time (typ)	150 ns
Endurance Cycles	1,000,000 program/erase cycles
Data Retention	20 years at 85°C
Temperature Range	Commercial: 0°C to +70°C; Industrial: -40°C to +85°C
Organization	32K x 8 bit organization
Supply Current (Vcc)	5 mA max @ Vcc = 5.5V
Standby Current	1 μA max @ Vcc = 5.5V

Instructions for Use:

1. Power Supply Requirements: Ensure the device is powered within the specified voltage range (4.5V to 5.5V). For programming, apply a higher voltage (12.0V to 13.0V) to the Vpp pin.

2. Programming: Follow the specific timing and control signals required for programming as detailed in the device datasheet. Each location can be programmed up to 1,000,000 times.

3. Erase Operation: The entire chip can be erased by exposing it to ultraviolet light for approximately 15 minutes through a quartz window on the package if available. Alternatively, use electrical erase methods as per datasheet specifications.

4. Data Retention: Data stored in the device will remain intact for up to 20 years at temperatures up to 85°C.

5. Handling Precautions: Handle with care to avoid static damage. Use appropriate ESD protection measures when handling or soldering the device.

6. Environmental Conditions: Operate within the specified temperature ranges to ensure reliable performance. Use the commercial grade for environments between 0°C and +70°C, and industrial grade for -40°C to +85°C.

7. Pin Configuration: Refer to the pin configuration diagram provided in the datasheet for correct wiring of power, ground, data, address, and control lines.

(For reference only)