Details

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BUY MAX813LESA https://www.utsource.net/itm/p/543258.html
Low-Cost, uP Supervisory Circuits

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC		4.5		5.5	V
Operating Temperature			-40		85	°C
Storage Temperature			-65		150	°C
Watchdog Timeout Period	TWD	RWD = 249kΩ	1.6		2.4	s
Manual Reset Timeout	TMR	RMR = 249kΩ	1.6		2.4	s
Power-Good Threshold	VPG	Rising	4.4		4.6	V
Power-Good Hysteresis			200			mV
Output Current (Watchdog)	IWD	VCC = 5V	0.1	0.2	0.3	mA
Output Current (Manual Reset)	IMR	VCC = 5V	0.1	0.2	0.3	mA
Output Current (Power-Good)	IPG	VCC = 5V	0.1	0.2	0.3	mA
Quiescent Current	IQ	VCC = 5V, No Load	10	15	20	μA
Reset Pulse Width	TRST	VCC = 5V, TPG = 1.6s	100	200	400	ms

Instructions for Use

1. Supply Voltage:

   • Ensure the supply voltage (VCC) is within the range of 4.5V to 5.5V.

2. Operating Temperature:

   • The device operates reliably within the temperature range of -40°C to 85°C.

3. Storage Temperature:

   • Store the device in an environment with temperatures ranging from -65°C to 150°C.

4. Watchdog Timeout Period:

   • Set the external resistor (RWD) to 249kΩ to achieve a watchdog timeout period of 1.6 to 2.4 seconds.

5. Manual Reset Timeout:

   • Set the external resistor (RMR) to 249kΩ to achieve a manual reset timeout period of 1.6 to 2.4 seconds.

6. Power-Good Threshold:

   • The power-good threshold (VPG) is set to trigger at 4.4V to 4.6V on the rising edge.
   • The hysteresis for the power-good threshold is 200mV.

7. Output Current:

   • The watchdog, manual reset, and power-good outputs can source current up to 0.3mA at VCC = 5V.

8. Quiescent Current:

   • The quiescent current (IQ) is typically 15μA when no load is present and VCC = 5V.

9. Reset Pulse Width:

   • The reset pulse width (TRST) is 100ms to 400ms when VCC = 5V and the power-good delay (TPG) is 1.6 seconds.

Additional Notes:

• Ensure proper decoupling capacitors are placed close to the VCC and GND pins to maintain stability.
• For detailed circuit design and layout guidelines, refer to the MAX813L datasheet provided by Maxim Integrated.

(For reference only)