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BUY DS1337S+ https://www.utsource.net/itm/p/11245522.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Operating Voltage	VCC	Continuous	2.3	-	5.5	V
Operating Current	ICC	Active, VCC = 3V	-	400	-	μA
Standby Current	ISB	VCC = 3V	-	1	-	μA
Frequency Accuracy	Δf	25°C	-	0	20	ppm
Temperature Range	Toper	Operating	-40	-	85	°C
Square Wave Output	fSQW	-	1	-	8192	Hz
Output Drive Capability	IOL	VCC = 3V, fSQW = 1kHz	-	4	-	mA
Input Leakage Current	IIH	VCC = 5.5V	-	1	-	μA
Output Leakage Current	IOL	VCC = 0V	-	1	-	μA
Data Retention	tDR	VCC = 0V	-	10	-	Years

Instructions for Using DS1337S+

1. Power Supply:

   • Ensure the supply voltage (VCC) is within the range of 2.3V to 5.5V.
   • The device can operate with a wide range of supply voltages, but optimal performance is achieved at 3V.

2. Clock Accuracy:

   • The frequency accuracy is ±20 ppm at 25°C. For applications requiring higher accuracy, consider using a temperature-compensated crystal oscillator (TCXO).

3. Current Consumption:

   • The active current consumption is typically 400 μA at 3V.
   • The standby current is typically 1 μA at 3V, making it suitable for battery-powered applications.

4. Temperature Range:

   • The device operates over a temperature range from -40°C to +85°C.

5. Square Wave Output:

   • The square wave output frequency can be set to 1 Hz, 1.024 kHz, 4.096 kHz, or 8.192 kHz.
   • The output drive capability is up to 4 mA at 3V and 1 kHz.

6. Input and Output Leakage:

   • The input leakage current should not exceed 1 μA at 5.5V.
   • The output leakage current should not exceed 1 μA at 0V.

7. Data Retention:

   • The device retains data for up to 10 years when the power is off (VCC = 0V).

8. Programming:

   • Use I2C communication to program and read the time and date registers.
   • The I2C address is determined by the A0, A1, and A2 pins. Refer to the datasheet for specific address configurations.

9. Reset:

   • The device does not have a reset pin. To reset the device, cycle the power (VCC) or use the software reset command via I2C.

10. Handling:

    • Handle the device with care to avoid static damage.
    • Follow proper ESD precautions when handling and soldering the device.

For more detailed information, refer to the official DS1337S+ datasheet provided by Maxim Integrated.

(For reference only)