Details

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BUY 25LC256T-I/SM https://www.utsource.net/itm/p/8970645.html
IC EEPROM 256K SPI 10MHZ 8SOIJ

Parameter	Description	Value
Device	Serial EEPROM	25LC256T-I/SM
Package	SOP-8	-
Operating Voltage (Vcc)	Supply Voltage Range	2.5V to 5.5V
Memory Size	Total Memory	256 Kbits (32 Kbytes)
Organization	Memory Organization	32,768 x 8 bits
Data Retention	Data Retention Time	100 years
Write Cycles	Endurance	1,000,000 write cycles per byte
Read Cycles	Read Cycles	Unlimited
Page Write Size	Page Write Size	32 bytes
Serial Interface	Communication Protocol	SPI (Serial Peripheral Interface)
Clock Frequency (fCLK)	Maximum Clock Frequency	10 MHz
Access Time (tACC)	Access Time	55 ns (max) at Vcc = 5.5V, 25°C
Standby Current (ISB)	Standby Current	1 μA (max) at Vcc = 5.5V, 25°C
Active Current (IACT)	Active Current	2 mA (max) at fCLK = 10 MHz, Vcc = 5.5V, 25°C
Write Time (tW)	Typical Write Time	5 ms (max) for 32-byte page
Operating Temperature (TA)	Operating Temperature Range	-40°C to +85°C
Storage Temperature (TSTG)	Storage Temperature Range	-65°C to +150°C
Package Marking	Package Marking	25LC256T-I/SM

Instructions

1. Power Supply:

   • Connect Vcc to the power supply (2.5V to 5.5V).
   • Connect GND to the ground.

2. Serial Interface:

   • Connect the SPI pins as follows:
     • SCK (Serial Clock): Connect to the master clock.
     • MOSI (Master Out Slave In): Connect to the master data output.
     • MISO (Master In Slave Out): Connect to the master data input.
     • CS (Chip Select): Connect to the master chip select signal. Pull low to activate the device.

3. Initialization:

   • Ensure the device is powered and the CS pin is high to keep the device in standby mode.
   • To communicate with the device, pull the CS pin low.

4. Reading Data:

   • Send the READ command (0x03) followed by the 24-bit address of the memory location.
   • The device will respond with the data from the specified address.

5. Writing Data:

   • Send the WRITE ENABLE command (0x06) to enable writing.
   • Send the WRITE command (0x02) followed by the 24-bit address and up to 32 bytes of data.
   • Wait for the write cycle to complete (5 ms maximum).

6. Status Register:

   • Use the READ STATUS REGISTER command (0x05) to read the status register.
   • Use the WRITE STATUS REGISTER command (0x01) to write to the status register.

7. Protection:

   • The device supports write protection using the status register. Set the WP bit to prevent accidental writes.

8. Power Down:

   • When not in use, set the CS pin high to put the device into standby mode to reduce power consumption.

9. Handling:

   • Handle the device with care to avoid static discharge, which can damage the component.
   • Store the device in a dry, cool place within the specified storage temperature range.

(For reference only)