Details

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BUY DS17487-5 https://www.utsource.net/itm/p/1568547.html
3V/5V Real-Time Clock

Parameter	Description	Min	Typ	Max	Unit
VCC	Supply Voltage	2.7	-	5.5	V
ICC	Supply Current (Active)	-	100	-	μA
ICC (Sleep)	Supply Current (Sleep Mode)	-	1	-	μA
fIN	Input Frequency	32.768	-	32.768	kHz
fOUT	Output Frequency	32.768	-	32.768	kHz
IOL	Output Low Current	-	4	-	mA
IOH	Output High Current	-	-0.4	-	mA
tPD	Propagation Delay	-	100	-	ns
tR	Rise Time	-	10	-	ns
tF	Fall Time	-	10	-	ns
Operating Temperature	Range	-40	-	85	°C
Storage Temperature	Range	-65	-	150	°C

Instructions for Use:

1. Power Supply:

   • Connect the VCC pin to a power supply within the range of 2.7V to 5.5V.
   • Ensure the ground (GND) pin is connected to the system ground.

2. Input Signal:

   • Apply a 32.768 kHz input signal to the fIN pin. This can be from a crystal oscillator or another suitable source.

3. Output Signal:

   • The fOUT pin will provide a 32.768 kHz output signal. This can be used to drive other circuits or devices requiring this frequency.

4. Sleep Mode:

   • To enter sleep mode, set the appropriate control pin to the specified level (usually low). The device will reduce its current consumption to approximately 1 μA.

5. Propagation Delay:

   • The propagation delay (tPD) is typically 100 ns. This should be considered when designing timing-sensitive applications.

6. Temperature Considerations:

   • The device operates reliably over a temperature range of -40°C to 85°C. For storage, the temperature range is -65°C to 150°C.

7. Handling:

   • Handle the device with care to avoid damage from electrostatic discharge (ESD). Use proper ESD protection equipment and practices.

8. Mounting:

   • Follow standard surface mount technology (SMT) procedures for mounting the device on a PCB. Ensure proper soldering and alignment.

9. Testing:

   • After assembly, verify the operation of the device by checking the input and output signals. Use an oscilloscope to confirm the correct frequency and waveform.

10. Troubleshooting:

    • If the device does not function as expected, check the power supply, input signal, and connections. Ensure that all pins are properly connected and that there are no short circuits or open circuits.

(For reference only)