Details

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BUY AT27C256R 15JC https://www.utsource.net/itm/p/12609176.html

Parameter	Description	Value
Device Type	EEPROM (Electrically Erasable Programmable Read-Only Memory)	AT27C256R
Manufacturer	Microchip Technology
Package Type	28-Pin PDIP (Plastic Dual Inline Package)
Operating Voltage (Vcc)	Supply Voltage for Operation	4.5V to 5.5V
Memory Capacity	Total Number of Bits	262,144 bits
Organization	Data Organization	32K x 8
Access Time (tAA)	Access Time	150ns
Page Mode	Page Mode Access	Not Supported
Programming Voltage (Vpp)	Programming Voltage for Writing Data	12.5V 卤 0.5V
Endurance	Write/Erase Cycles	1,000,000 cycles
Data Retention	Duration Data is Retained	10 years
Temperature Range	Operating Temperature	-40掳C to +85掳C
Standby Current (ISB)	Current in Standby Mode	10渭A max
Active Current (ICC)	Current During Active Operation	20mA max

Instructions for Use:

1. Power Supply: Ensure the device is powered within the specified operating voltage range of 4.5V to 5.5V.
2. Programming Voltage: Apply the programming voltage (Vpp) of 12.5V 卤 0.5V only during write operations.
3. Addressing: Address lines must be stable during read and write operations to ensure correct data access.
4. Write Operations: Before writing new data, ensure the memory location is erased. Each sector can endure up to 1,000,000 write/erase cycles.
5. Read Operations: Access time is 150ns; ensure that your system timing accounts for this delay.
6. Temperature Considerations: Operate the device within the temperature range of -40掳C to +85掳C to maintain reliability.
7. Handling Precautions: Handle with care to avoid damage from electrostatic discharge (ESD).

(For reference only)