Details

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BUY DS1687-5+ https://www.utsource.net/itm/p/4390875.html
IC RTC CLK/CALENDAR PAR 24-EDIP

Parameter	Description	Min	Typ	Max	Unit
Operating Voltage (VCC)	Supply voltage range	2.0	-	5.5	V
Operating Temperature	Temperature range for operation	-40	-	+85	°C
Frequency Output	Frequency output range	32.768	-	32.768	kHz
Current Consumption	Active mode current consumption	-	100	-	μA
Standby Current	Standby mode current consumption	-	1	-	μA
Clock Accuracy	Accuracy of the real-time clock	-	±2	-	ppm/°C
Time Update Rate	Rate at which the time is updated	-	1	-	second
Alarm Function	Number of alarm functions available	-	4	-	-
Square Wave Output	Available square wave frequencies	1	2, 4, 8	-	Hz
Write Protection	Feature to prevent accidental writes	-	Yes	-	-
Power-On Reset	Automatic reset on power-on	-	Yes	-	-

Instructions for Using DS1687-5+

1. Power Supply:

   • Connect the VCC pin to a supply voltage between 2.0V and 5.5V.
   • Connect the GND pin to ground.

2. Clock Input:

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

3. Frequency Output:

   • The SQW/OUT pin can be configured to output a square wave at 1 Hz, 2 Hz, 4 Hz, or 8 Hz. Use the control registers to set the desired frequency.

4. Real-Time Clock:

   • Set the initial time using the appropriate registers. The RTC updates the time every second.

5. Alarms:

   • Configure up to 4 alarms by setting the alarm registers. Alarms can be set to trigger on specific seconds, minutes, hours, and days.

6. Write Protection:

   • Enable write protection to prevent accidental changes to the RTC settings. This is controlled via a specific register bit.

7. Power-On Reset:

   • The device automatically resets when power is applied, ensuring a clean start.

8. Standby Mode:

   • To reduce power consumption, put the device into standby mode by setting the appropriate register bit. The current consumption in this mode is approximately 1 μA.

9. Reading Time and Status:

   • Read the current time and status of the RTC and alarms by accessing the relevant registers.

10. Square Wave Output:

    • Configure the square wave output to generate a signal at the desired frequency. This can be used for various timing applications.

For detailed register maps and programming instructions, refer to the DS1687-5+ datasheet.

(For reference only)