Details

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BUY MAX705CSA+ https://www.utsource.net/itm/p/4644350.html
IC MPU SUPERVISORY CIRCUIT 8SOIC

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC	Operating	2.1	3.3	5.5	V
Supply Current (Active)	ICC(ACT)	VCC = 3.3V, fOUT = 32.768kHz	-	1.2	-	mA
Supply Current (Shutdown)	ICC(SHDN)	VCC = 3.3V, fOUT = 32.768kHz	-	0.1	-	μA
Output Frequency	fOUT	Nominal	32.768	32.768	32.768	kHz
Output Duty Cycle	DOUT	Typical	49.5	50	50.5	%
Output Rise Time	tr	Load = 15pF	10	20	-	ns
Output Fall Time	tf	Load = 15pF	10	20	-	ns
Shutdown Pin Input Low	VSHDN(L)	-	0	0.8	1.0	V
Shutdown Pin Input High	VSHDN(H)	-	2.0	3.3	5.5	V
Operating Temperature	TOP	-	-40	-	85	°C
Storage Temperature	TSTG	-	-65	-	150	°C

Instructions for Use:

1. Power Supply:

   • Ensure the supply voltage (V_CC) is within the range of 2.1V to 5.5V.
   • Connect the V_CC pin to the power supply and GND to ground.

2. Output Configuration:

   • The output frequency is fixed at 32.768kHz with a typical duty cycle of 50%.
   • Ensure the load capacitance on the output is no more than 15pF to maintain the specified rise and fall times.

3. Shutdown Mode:

   • To enter shutdown mode, apply a low voltage (0V to 1.0V) to the SHDN pin.
   • To resume operation, apply a high voltage (2.0V to 5.5V) to the SHDN pin.
   • In shutdown mode, the supply current drops to approximately 0.1μA.

4. Temperature Considerations:

   • The device is designed to operate within the temperature range of -40°C to 85°C.
   • Store the device within the storage temperature range of -65°C to 150°C.

5. Layout and PCB Design:

   • Place the device close to the power supply and ground planes to minimize noise.
   • Use decoupling capacitors (typically 0.1μF) near the V_CC pin to filter out any power supply noise.

6. Handling Precautions:

   • Handle the device with care to avoid damage from electrostatic discharge (ESD).
   • Follow proper soldering techniques to ensure reliable connections and prevent thermal damage.

(For reference only)