Details

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BUY DS28EC20 https://www.utsource.net/itm/p/4403070.html
20Kb 1-Wire EEPROM

Parameter	Description	Units/Notes
Package	Small Outline Integrated Circuit (SOIC)	8-pin SOIC
Operating Voltage	Supply voltage range	2.8V to 5.25V
Interface	1-Wire interface	Communication protocol
Memory Size	EEPROM memory size	2048 bits (256 bytes)
Page Size	EEPROM page size	32 bytes
Write Time	Page write time	5ms
Endurance	Write cycle endurance	1,000,000 cycles per page
Data Retention	Guaranteed data retention	100 years
Temperature Range	Operating temperature range	-40掳C to +85掳C
Standby Current	Quiescent current in standby mode	1 渭A
Active Current	Current during active operations	1.5 mA

Instructions for Use

1. Power Supply Connection:

   • Connect VCC to a power supply within the operating voltage range (2.8V to 5.25V).
   • Connect GND to the system ground.

2. 1-Wire Interface Setup:

   • Connect the 1-Wire data line (DQ) to a microcontroller or other host device.
   • Ensure that DQ is pulled up to VCC with a resistor, typically 4.7k惟.

3. Initialization:

   • Initialize the 1-Wire bus using the appropriate commands in your software.
   • Send a reset pulse followed by a presence detect sequence to ensure communication is established.

4. Reading/Writing Data:

   • Use the read and write commands specific to the DS28EC20 to access the EEPROM memory.
   • For writing, ensure you do not exceed the maximum page write time of 5ms.
   • For reading, send the appropriate command and then read back the data from the specified address.

5. Error Checking:

   • Implement CRC checks as part of the 1-Wire protocol to ensure data integrity.
   • Monitor for any errors during read/write operations and handle them appropriately in your application code.

6. Power Management:

   • The device has a low standby current, making it suitable for battery-powered applications.
   • Ensure that the device is powered down correctly when not in use to conserve power.

7. Environmental Considerations:

   • Operate the device within the specified temperature range to ensure reliable performance.
   • Protect against electrostatic discharge (ESD) during handling and installation.

(For reference only)