Details

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BUY M48T08-100 https://www.utsource.net/itm/p/9276764.html
M48T08-100 ST DIP 2017+

Parameter	Description	Value	Unit
Device Type	Real-Time Clock (RTC) with RAM	M48T08-100
Package	8-Pin DIP, SOIC, TSSOP
Operating Voltage	Supply Voltage Range	2.0 to 5.5	V
Standby Current	Current Consumption in Standby Mode	500	nA
Active Current	Current Consumption in Active Mode	300	μA
RAM Size	Non-Volatile RAM Size	1024	bytes
Clock Accuracy	Maximum Clock Deviation at 25°C	±200	ppm
Operating Temperature	Temperature Range for Normal Operation	-40 to +85	°C
Storage Temperature	Temperature Range for Storage	-65 to +150	°C
Write Cycle Time	Time Required for a Write Cycle	10	ms
Read Cycle Time	Time Required for a Read Cycle	1.5	μs
Data Retention	Minimum Data Retention Time	10	years
Interface	Communication Protocol	I2C, SPI
Oscillator	Internal or External Oscillator	Internal

Instructions for Using M48T08-100

1. Power Supply:

   • Connect the Vcc pin to a power supply within the range of 2.0V to 5.5V.
   • Connect the GND pin to the ground.

2. Clock Initialization:

   • After powering up, the RTC will start running from the internal oscillator.
   • Use the appropriate I2C or SPI commands to set the initial time and date.

3. Reading Time and Date:

   • Use the I2C or SPI read commands to access the current time and date registers.
   • The time and date are stored in BCD (Binary-Coded Decimal) format.

4. Writing to RAM:

   • To write data to the non-volatile RAM, use the I2C or SPI write commands.
   • Ensure that the write cycle time of 10ms is observed to prevent data corruption.

5. Reading from RAM:

   • Use the I2C or SPI read commands to access the data stored in the non-volatile RAM.
   • The read cycle time is 1.5μs.

6. Standby Mode:

   • To enter standby mode, set the appropriate control register bit.
   • In standby mode, the device consumes only 500nA of current.

7. Temperature Considerations:

   • Ensure that the operating temperature remains within -40°C to +85°C for reliable operation.
   • Store the device within the storage temperature range of -65°C to +150°C.

8. Data Retention:

   • The device retains data for a minimum of 10 years when powered off.

9. Oscillator Adjustment:

   • The internal oscillator provides a clock accuracy of ±200ppm at 25°C.
   • For higher accuracy, consider using an external oscillator or trimming the internal oscillator.

10. Handling Precautions:

    • Handle the device with care to avoid static damage.
    • Follow proper soldering techniques to ensure reliable connections.

(For reference only)