Details

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BUY M41T11 https://www.utsource.net/itm/p/12612363.html

Parameter	Description
Part Number	M41T11
Function	Real-Time Clock (RTC) with I2C Interface
Package	SO-8
Operating Voltage (Vdd)	2.0V to 5.5V
I2C Address	1101000 (Fixed)
Temperature Range	-40掳C to +85掳C
Frequency Accuracy	卤200ppm at 25掳C (with external 32.768kHz crystal)
Supply Current	< 500nA (Typical in Backup Mode)
Oscillator Type	External 32.768kHz Crystal
Clock Output	32.768kHz Square Wave (Optional)
Power Supply Pins	Vdd, Vss (GND)
Alarm Function	Yes
Trickle Charger	Yes, for backup power source

Instructions

1. Power Supply Connection:

   • Connect Vdd to the positive supply voltage (2.0V to 5.5V).
   • Connect Vss to ground.

2. External Crystal Connection:

   • Connect a 32.768kHz crystal between X1 and X2 pins for accurate timekeeping.

3. I2C Communication:

   • Ensure proper pull-up resistors on SDA and SCL lines.
   • Use the fixed I2C address (1101000) for communication.

4. Initialization:

   • Set the initial date and time using I2C commands.
   • Configure the alarm settings if needed.

5. Backup Power:

   • If using a backup battery, connect it to Vbat pin via the trickle charger circuitry provided by the device.

6. Reading Time/Date:

   • Use I2C read commands to retrieve current time and date data from registers.

7. Alarm Setup:

   • Program the alarm registers to set desired alarm times.
   • Enable the alarm interrupt if required.

8. Output Frequency:

   • For applications requiring a clock signal, enable the 32.768kHz output.

9. Low Power Mode:

   • In low power or backup mode, ensure that Vdd is disconnected and Vbat is supplying power to maintain RTC functionality.

10. Handling:

    • Handle the device with care to avoid damage to sensitive components.

(For reference only)