Details

---

BUY 25LC1024-I/SM https://www.utsource.net/itm/p/5429476.html
1 Mbit SPI Bus Serial EEPROM

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC	Operating	2.5	-	5.5	V
Standby Current	ICC(SB)	VCC = 5.5V, T = 25°C	-	1	5	μA
Active Current	ICC(ACT)	VCC = 5.5V, T = 25°C	-	2	3	mA
Write Cycle Time	tWC	-	-	5	-	ms
Page Write Time	tPW	-	-	4	-	ms
Serial Clock Frequency	fCLK	-	0	-	10	MHz
Data Retention	-	-	-	100	-	Years
Operating Temperature	Toperating	-	-40	-	85	°C
Storage Temperature	Tstorage	-	-65	-	150	°C

Instructions for 25LC1024-I/SM

1. Power Supply:

   • Ensure the supply voltage (VCC) is within the range of 2.5V to 5.5V.
   • The device has a low standby current of 1 to 5 μA at 5.5V and 25°C.

2. Clock Frequency:

   • The maximum serial clock frequency (fCLK) is 10 MHz.

3. Write Operations:

   • A single write cycle takes up to 5 ms.
   • Writing a page (up to 32 bytes) takes up to 4 ms.

4. Temperature:

   • The operating temperature range is from -40°C to 85°C.
   • The storage temperature range is from -65°C to 150°C.

5. Data Retention:

   • The data retention period is 100 years under typical conditions.

6. Pin Configuration:

   • VCC: Power supply
   • GND: Ground
   • SI: Serial data input
   • SO: Serial data output
   • SCK: Serial clock
   • /CS: Chip select (active low)
   • HOLD: Hold (optional, can be tied to VCC if not used)

7. Communication Protocol:

   • Use SPI (Serial Peripheral Interface) protocol for communication.
   • Ensure the chip select (/CS) is low during communication.
   • Data is shifted in on the rising edge of the clock (SCK) and out on the falling edge.

8. Initialization:

   • Before any read or write operation, ensure the device is properly powered and the /CS line is low.
   • Send the appropriate command byte followed by the necessary address and data bytes.

9. Read Operation:

   • Send the READ command (0x03) followed by the 24-bit address.
   • The device will start sending data on the next rising edge of SCK.

10. Write Operation:

    • Send the WRITE command (0x02) followed by the 24-bit address and the data to be written.
    • Ensure the write cycle time (tWC) is respected to avoid data corruption.

11. Page Write:

    • For writing more than one byte at a time, use the PAGE WRITE command (0x02).
    • Up to 32 bytes can be written in a single page write operation.

12. Status Check:

    • Use the READ STATUS REGISTER command (0x05) to check the status of the device, including the write in progress (WIP) bit.

13. Write Protection:

    • Use the WRITE ENABLE (0x06) and WRITE DISABLE (0x04) commands to control write operations.
    • The WRITE PROTECT pin can be used to prevent accidental writes.

14. Deep Power-Down Mode:

    • To reduce power consumption, use the DEEP POWER-DOWN command (0xB9).
    • The device will enter a low-power state with minimal current draw.

15. Handling:

    • Handle the device with care to avoid static damage.
    • Store the device in a dry, cool environment when not in use.

(For reference only)